def mmi_ramp(raster_layer): """Generate an mmi ramp using standardised range of 1-12 A standarised range is used so that two shakemaps of different intensities can be properly compared visually with colours stretched accross the same range. The colours used are the 'standard' colours commonly shown for the mercalli scale e.g. on wikipedia and other sources. :param raster_layer: A raster layer that will have an mmi style applied. :type raster_layer: QgsRasterLayer """ items = [] for class_max in range(1, 13): colour = QtGui.QColor(mmi_colour(class_max)) label = '%i' % class_max ramp_item = QgsColorRampShader.ColorRampItem(class_max, colour, label) items.append(ramp_item) raster_shader = QgsRasterShader() ramp_shader = QgsColorRampShader() ramp_shader.setColorRampType(QgsColorRampShader.INTERPOLATED) ramp_shader.setColorRampItemList(items) raster_shader.setRasterShaderFunction(ramp_shader) band = 1 renderer = QgsSingleBandPseudoColorRenderer( raster_layer.dataProvider(), band, raster_shader) raster_layer.setRenderer(renderer)
def createRasterShader(fields, mode = "rgb", scale = "float"): shader = QgsRasterShader() colRamp = QgsColorRampShader() colRamp.setColorRampType(QgsColorRampShader.INTERPOLATED) ramp = [] col = QColor() for line in fields: val = float(line[0]) txt = unicode(line[1]) if mode == "rgb" or mode == "rnd": if scale != "float": color = [float(x)/255.0 for x in line[2:6]] col.setRgbF(*color) elif mode == "hsv": if scale != "float": color = [float(x)/float(y) for x,y in zip(line[2:6], [360, 100, 100, 255])] col.setHsvF(*color) elif mode == "hex": col.setNamedColor(str(line[2])) ramp.append(QgsColorRampShader.ColorRampItem(val, col, txt)) colRamp.setColorRampItemList(ramp) shader.setRasterShaderFunction(colRamp) return(shader)
def testNan(self): shader = QgsColorRampShader() item1 = QgsColorRampShader.ColorRampItem(1, QColor(0, 0, 0)) item2 = QgsColorRampShader.ColorRampItem(2, QColor(255, 255, 255)) shader.setColorRampItemList([item1, item2]) self.assertFalse(shader.shade(float('NaN'))[0]) self.assertFalse(shader.shade(float("inf"))[0])
def aggregate_layers(self, layers, d): aggregation = self.frequency.itemData(self.frequency.currentIndex()) month = str(d.month) month = month if len(month) == 2 else '0' + month day = str(d.day) day = day if len(day) == 2 else '0' + day filtered_layers = filter(lambda x: '.tif' in x, layers) datasets = [] file_name = None for l in filtered_layers: datasets.append(Dataset(l)) sum = datasets[0] for i in range(1,len(datasets)-1): sum += datasets[i] if aggregation == 'SUM': Env.overwrite = True avg = sum file_name = self.download_folder.text() + '/' + str(d.year) + '_' + month + '_' + day + '_SUM.tif' avg.save(file_name) elif aggregation == 'AVG': Env.overwrite = True avg = sum avg /= len(datasets) file_name = self.download_folder.text() + '/' + str(d.year) + '_' + month + '_' + day + '_AVG.tif' avg.save(file_name) if self.add_to_canvas.isChecked() is True: self.bar.pushMessage(None, str(file_name), level=QgsMessageBar.INFO) title = None if aggregation == 'SUM': title = self.tr('TRMM Aggregate (Sum): ') + str(d.year) + '-' + str(month) + '-' + str(day) elif aggregation == 'AVG': title = self.tr('TRMM Aggregate (Average): ') + str(d.year) + '-' + str(month) + '-' + str(day) rl = self.iface.addRasterLayer(file_name, title) fcn = QgsColorRampShader() fcn.setColorRampType(QgsColorRampShader.INTERPOLATED) lst = [ QgsColorRampShader.ColorRampItem(0, QColor(247, 251, 255, 0), '< 2.6 [mm]'), QgsColorRampShader.ColorRampItem(2.6, QColor(222, 235, 247), '< 5.2 [mm]'), QgsColorRampShader.ColorRampItem(5.2, QColor(199, 220, 239), '< 7.8 [mm]'), QgsColorRampShader.ColorRampItem(7.8, QColor(162, 203, 226), '< 10.4 [mm]'), QgsColorRampShader.ColorRampItem(10.4, QColor(114, 178, 215), '< 13 [mm]'), QgsColorRampShader.ColorRampItem(13, QColor(73, 151, 201), '< 15.6 [mm]'), QgsColorRampShader.ColorRampItem(15.6, QColor(40, 120, 184), '< 18 [mm]'), QgsColorRampShader.ColorRampItem(18, QColor(13, 87, 161), '< 20 [mm]'), QgsColorRampShader.ColorRampItem(20, QColor(8, 48, 107), '>= 20 [mm]') ] fcn.setColorRampItemList(lst) shader = QgsRasterShader() shader.setRasterShaderFunction(fcn) renderer = QgsSingleBandPseudoColorRenderer(rl.dataProvider(), 1, shader) rl.setRenderer(renderer) rl.triggerRepaint()
def testShaderCrash(self): """Check if we assign a shader and then reassign it no crash occurs.""" myPath = os.path.join(unitTestDataPath('raster'), 'band1_float32_noct_epsg4326.tif') myFileInfo = QFileInfo(myPath) myBaseName = myFileInfo.baseName() myRasterLayer = QgsRasterLayer(myPath, myBaseName) myMessage = 'Raster not loaded: %s' % myPath assert myRasterLayer.isValid(), myMessage myRasterShader = QgsRasterShader() myColorRampShader = QgsColorRampShader() myColorRampShader.setColorRampType(QgsColorRampShader.INTERPOLATED) myItems = [] myItem = QgsColorRampShader.ColorRampItem(10, QtGui.QColor('#ffff00'), 'foo') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem(100, QtGui.QColor('#ff00ff'), 'bar') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem(1000, QtGui.QColor('#00ff00'), 'kazam') myItems.append(myItem) myColorRampShader.setColorRampItemList(myItems) myRasterShader.setRasterShaderFunction(myColorRampShader) myPseudoRenderer = QgsSingleBandPseudoColorRenderer( myRasterLayer.dataProvider(), 1, myRasterShader) myRasterLayer.setRenderer(myPseudoRenderer) return ######## works first time ############# myRasterShader = QgsRasterShader() myColorRampShader = QgsColorRampShader() myColorRampShader.setColorRampType(QgsColorRampShader.INTERPOLATED) myItems = [] myItem = QgsColorRampShader.ColorRampItem(10, QtGui.QColor('#ffff00'), 'foo') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem(100, QtGui.QColor('#ff00ff'), 'bar') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem(1000, QtGui.QColor('#00ff00'), 'kazam') myItems.append(myItem) myColorRampShader.setColorRampItemList(myItems) myRasterShader.setRasterShaderFunction(myColorRampShader) ######## crash on next line (fixed now)################## myPseudoRenderer = QgsSingleBandPseudoColorRenderer( myRasterLayer.dataProvider(), 1, myRasterShader) myRasterLayer.setRenderer(myPseudoRenderer)
def setRamp(layer, iface): renderer = layer.renderer() provider = layer.dataProvider() extent = layer.extent() ver = provider.hasStatistics(1, QgsRasterBandStats.All) stats = provider.bandStatistics(1, QgsRasterBandStats.All,extent, 0) if ver is not False: print "minimumValue = ", stats.minimumValue print "maximumValue = ", stats.maximumValue if (stats.minimumValue < 0): min = 0 else: min= stats.minimumValue max = stats.maximumValue range = max - min add = range//2 interval = min + add colDic = {'red':'#ff0000', 'yellow':'#ffff00','blue':'#0000ff'} valueList =[min, interval, max] lst = [ QgsColorRampShader.ColorRampItem(valueList[0], QColor(colDic['red'])), QgsColorRampShader.ColorRampItem(valueList[1], QColor(colDic['yellow'])), QgsColorRampShader.ColorRampItem(valueList[2], QColor(colDic['blue']))] myRasterShader = QgsRasterShader() myColorRamp = QgsColorRampShader() myColorRamp.setColorRampItemList(lst) myColorRamp.setColorRampType(QgsColorRampShader.INTERPOLATED) myRasterShader.setRasterShaderFunction(myColorRamp) myPseudoRenderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), layer.type(), myRasterShader) layer.setRenderer(myPseudoRenderer) layer.triggerRepaint()
def displaced_people_style(layer): """Simple style to display a displaced count with a binary style. :param layer: The layer to style. :type layer: QgsRasterLayer """ color_ramp = QgsColorRampShader() color_ramp.setColorRampType(QgsColorRampShader.INTERPOLATED) color_ramp.setColorRampItemList(legend_raster_displaced) shader = QgsRasterShader() shader.setRasterShaderFunction(color_ramp) renderer = QgsSingleBandPseudoColorRenderer( layer.dataProvider(), 1, shader) layer.setRenderer(renderer)
def testVaryingColorFixedWidth(self): """ test that rendering a interpolated line with fixed width and varying color""" interpolated_width = QgsInterpolatedLineWidth() interpolated_color = QgsInterpolatedLineColor() interpolated_width.setIsVariableWidth(False) interpolated_width.setFixedStrokeWidth(5) color_ramp = QgsColorRampShader( 0, 7, QgsStyle.defaultStyle().colorRamp('Viridis'), QgsColorRampShader.Interpolated) color_ramp.classifyColorRamp(10) interpolated_color.setColor(color_ramp) interpolated_color.setColoringMethod( QgsInterpolatedLineColor.ColorRamp) self.renderImage(interpolated_width, interpolated_color, 'interpolatedlinesymbollayer_2')
def updateElevationLayer(self, value=1.0): fcn = QgsColorRampShader() fcn.setColorRampType(QgsColorRampShader.Discrete) fcn.setColorRampItemList([QgsColorRampShader.ColorRampItem(value, QColor(255, 20, 225), f'Elevation {value}')]) shader = QgsRasterShader() shader.setRasterShaderFunction(fcn) renderer = QgsSingleBandPseudoColorRenderer(self.raster_layer.dataProvider(), 1, shader) self.raster_layer.setRenderer(renderer) self.raster_layer.triggerRepaint()
def run(self): """Run method that performs all the real work""" # show the dialog self.dlg.show() self.toggle_widgets(False) self.layer = self.iface.activeLayer() if self.layer is None: self.dlg.header.setText("No layer selected.") self.dlg.header.setStyleSheet("color: #000000;") else: if isinstance(self.layer, QgsRasterLayer) is False: raise TypeError("Expected QgsRasterLayer, got {}".format( type(self.layer))) self.dlg.header.setText("") # Active layer if not hasattr(self.layer, "hasFilter"): self.fcn = QgsColorRampShader() self.fcn.setColorRampType(QgsColorRampShader.Interpolated) self.layer.hasFilter = True else: self.toggle_widgets(True) if self.MAX == float("-inf"): self.startWorker(self.iface, self.layer) # Run the dialog event loop # self.set_values(True) result = self.dlg.exec_() self.dlg.threshold_0_button.clicked.disconnect() self.dlg.threshold_1_button.clicked.disconnect() self.dlg.threshold_2_button.clicked.disconnect() # See if OK was pressed if result: pass # print("OK was pressed.") # Do something useful here - delete the line containing pass and # substitute with your code. else: pass
def testTwoClassesDiscrete(self): # test for #47759 shader = QgsColorRampShader(0, 50, None, QgsColorRampShader.Discrete) item1 = QgsColorRampShader.ColorRampItem(50, QColor(0, 0, 0)) item2 = QgsColorRampShader.ColorRampItem(float("inf"), QColor(255, 255, 255)) shader.setColorRampItemList([item1, item2]) color1 = shader.shade(50) self.assertEqual(color1[1:4], (0, 0, 0)) color2 = shader.shade(50.00000000001) self.assertEqual(color2[1:4], (255, 255, 255))
def testVaryingColorVaryingWidthExact(self): """ test that rendering a interpolated line with varying width and varying color with exact color ramp """ interpolated_width = QgsInterpolatedLineWidth() interpolated_color = QgsInterpolatedLineColor() interpolated_width.setIsVariableWidth(True) interpolated_width.setMinimumValue(1) interpolated_width.setMaximumValue(8) interpolated_width.setMinimumWidth(1) interpolated_width.setMaximumWidth(10) color_ramp = QgsColorRampShader( 0, 10, QgsStyle.defaultStyle().colorRamp('Viridis'), QgsColorRampShader.Exact) color_ramp.classifyColorRamp(10) interpolated_color.setColor(color_ramp) interpolated_color.setColoringMethod( QgsInterpolatedLineColor.ColorRamp) self.renderImage(interpolated_width, interpolated_color, 'interpolatedlinesymbollayer_6')
def testVaryingColorVaryingWidthDiscrete(self): """ test that rendering a interpolated line with varying width and varying color with discrete color ramp """ interpolated_width = QgsInterpolatedLineWidth() interpolated_color = QgsInterpolatedLineColor() interpolated_width.setIsVariableWidth(True) interpolated_width.setMinimumValue(1) interpolated_width.setMaximumValue(8) interpolated_width.setMinimumWidth(1) interpolated_width.setMaximumWidth(10) color_ramp = QgsColorRampShader( 2, 7, QgsStyle.defaultStyle().colorRamp('RdGy'), QgsColorRampShader.Discrete) color_ramp.classifyColorRamp(5) interpolated_color.setColor(color_ramp) interpolated_color.setColoringMethod( QgsInterpolatedLineColor.ColorRamp) self.renderImage(interpolated_width, interpolated_color, 'interpolatedlinesymbollayer_5')
def testCreateColorRamp(self): shader = QgsColorRampShader(1, 3) item1 = QgsColorRampShader.ColorRampItem(1, QColor(255, 0, 0)) item2 = QgsColorRampShader.ColorRampItem(2, QColor(255, 255, 0)) item3 = QgsColorRampShader.ColorRampItem(3, QColor(255, 255, 255)) shader.setColorRampItemList([item1, item2, item3]) shaderRamp = shader.createColorRamp() gradientRamp = QgsGradientColorRamp( QColor(255, 0, 0), QColor(255, 255, 255), False, [QgsGradientStop(0.5, QColor(255, 255, 0))]) self.assertEqual(shaderRamp.color1(), gradientRamp.color1()) self.assertEqual(shaderRamp.color2(), gradientRamp.color2()) self.assertEqual(shaderRamp.stops(), gradientRamp.stops())
def get_quantile_ramp_item_list(layer): """ Returns the quantile ramp item list and overrides the ramp items labels with our custom categories. We use a dummy shader function to help us with the quantile classification """ stats = layer.dataProvider().bandStatistics( 1, QgsRasterBandStats.All) min_val = stats.minimumValue max_value = stats.maximumValue colors = [ QColor('#4c724b'), QColor('#89a167'), QColor('#d9d98d'), QColor('#b08d64'), QColor('#8a514a') ] dummy_shader = QgsColorRampShader( minimumValue=min_val, maximumValue=max_val, colorRamp=QgsPresetSchemeColorRamp(colors=colors), type=QgsColorRampShader.Discrete, classificationMode=QgsColorRampShader.Quantile) dummy_shader.classifyColorRamp(classes=5, band=1, input=layer.dataProvider()) labels = ['Very low', 'Low', 'Moderate', 'High', 'Very high'] ramp_items = [] for i, ramp_item in enumerate(dummy_shader.colorRampItemList()): ramp_item.label = labels[i] ramp_items.append(ramp_item) return ramp_items
def testRenderBottomToTop(self): layer = QgsPointCloudLayer( unitTestDataPath() + '/point_clouds/ept/sunshine-coast/ept.json', 'test', 'ept') self.assertTrue(layer.isValid()) renderer = QgsPointCloudAttributeByRampRenderer() renderer.setAttribute('Intensity') renderer.setMinimum(200) renderer.setMaximum(1000) ramp = QgsStyle.defaultStyle().colorRamp("Viridis") shader = QgsColorRampShader(200, 1000, ramp) shader.classifyColorRamp() renderer.setColorRampShader(shader) layer.setRenderer(renderer) layer.renderer().setPointSize(6) layer.renderer().setPointSizeUnit(QgsUnitTypes.RenderMillimeters) layer.renderer().setDrawOrder2d( QgsPointCloudRenderer.DrawOrder.BottomToTop) mapsettings = QgsMapSettings() mapsettings.setOutputSize(QSize(400, 400)) mapsettings.setOutputDpi(96) mapsettings.setDestinationCrs(layer.crs()) mapsettings.setExtent(QgsRectangle(498061, 7050991, 498069, 7050999)) mapsettings.setLayers([layer]) renderchecker = QgsMultiRenderChecker() renderchecker.setMapSettings(mapsettings) renderchecker.setControlPathPrefix('pointcloudrenderer') renderchecker.setControlName('expected_ramp_bottom_to_top') result = renderchecker.runTest('expected_ramp_bottom_to_top') TestQgsPointCloudAttributeByRampRenderer.report += renderchecker.report( ) self.assertTrue(result)
def mmi_ramp_roman(raster_layer): """Generate an mmi ramp using range of 1-10 on roman. A standarised range is used so that two shakemaps of different intensities can be properly compared visually with colours stretched accross the same range. The colours used are the 'standard' colours commonly shown for the mercalli scale e.g. on wikipedia and other sources. :param raster_layer: A raster layer that will have an mmi style applied. :type raster_layer: QgsRasterLayer .. versionadded:: 4.0 """ items = [] sorted_mmi_scale = sorted( earthquake_mmi_scale['classes'], key=itemgetter('value')) for class_max in sorted_mmi_scale: colour = class_max['color'] label = '%s' % class_max['key'] ramp_item = QgsColorRampShader.ColorRampItem( class_max['value'], colour, label) items.append(ramp_item) raster_shader = QgsRasterShader() ramp_shader = QgsColorRampShader() ramp_shader.setColorRampType(QgsColorRampShader.INTERPOLATED) ramp_shader.setColorRampItemList(items) raster_shader.setRasterShaderFunction(ramp_shader) band = 1 renderer = QgsSingleBandPseudoColorRenderer( raster_layer.dataProvider(), band, raster_shader) raster_layer.setRenderer(renderer)
def postProcessLayer(self, layer, context, feedback): """ Apply quantile classification. """ if not isinstance(layer, QgsRasterLayer): return feedback.pushInfo('Apply styling(symbology) to raster layer..') def get_quantile_ramp_item_list(layer): """ Returns the quantile ramp item list and overrides the ramp items labels with our custom categories. We use a dummy shader function to help us with the quantile classification """ stats = layer.dataProvider().bandStatistics( 1, QgsRasterBandStats.All) min_val = stats.minimumValue max_value = stats.maximumValue colors = [ QColor('#4c724b'), QColor('#89a167'), QColor('#d9d98d'), QColor('#b08d64'), QColor('#8a514a') ] dummy_shader = QgsColorRampShader( minimumValue=min_val, maximumValue=max_val, colorRamp=QgsPresetSchemeColorRamp(colors=colors), type=QgsColorRampShader.Discrete, classificationMode=QgsColorRampShader.Quantile) dummy_shader.classifyColorRamp(classes=5, band=1, input=layer.dataProvider()) labels = ['Very low', 'Low', 'Moderate', 'High', 'Very high'] ramp_items = [] for i, ramp_item in enumerate(dummy_shader.colorRampItemList()): ramp_item.label = labels[i] ramp_items.append(ramp_item) return ramp_items shader_fnc = QgsColorRampShader() shader_fnc.setColorRampType(QgsColorRampShader.Discrete) shader_fnc.setColorRampItemList(get_quantile_ramp_item_list(layer)) shader = QgsRasterShader() shader.setRasterShaderFunction(shader_fnc) renderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), 1, shader) layer.setRenderer(renderer)
def __init__(self, layer): self.colDic = {'tan':'#ffebb0', 'green':'#267300', 'brown':'#734d00', 'white':'#ffffff', 'red':'#e60000', 'light gray':'#f0f0f0', 'blue':'#004cab'} self.shader = QgsRasterShader() self.ramp = QgsColorRampShader() self.colLst = [] self.valLst = [] self.labLst = [] self.opacity = 1.0 self.layer = layer self.provider = layer.dataProvider() extent = layer.extent() self.ver = self.provider.hasStatistics(1, QgsRasterBandStats.All) self.stats = self.provider.bandStatistics(1, QgsRasterBandStats.All, extent, 0)
def testRenderCrsTransform(self): layer = QgsPointCloudLayer( unitTestDataPath() + '/point_clouds/ept/sunshine-coast/ept.json', 'test', 'ept') self.assertTrue(layer.isValid()) renderer = QgsPointCloudAttributeByRampRenderer() renderer.setAttribute('Intensity') renderer.setMinimum(200) renderer.setMaximum(1000) ramp = QgsStyle.defaultStyle().colorRamp("Viridis") shader = QgsColorRampShader(200, 1000, ramp) shader.classifyColorRamp() renderer.setColorRampShader(shader) layer.setRenderer(renderer) layer.renderer().setPointSize(2) layer.renderer().setPointSizeUnit(QgsUnitTypes.RenderMillimeters) mapsettings = QgsMapSettings() mapsettings.setOutputSize(QSize(400, 400)) mapsettings.setOutputDpi(96) mapsettings.setDestinationCrs( QgsCoordinateReferenceSystem('EPSG:4326')) mapsettings.setExtent( QgsRectangle(152.980508492, -26.662023491, 152.980586020, -26.662071137)) mapsettings.setLayers([layer]) renderchecker = QgsMultiRenderChecker() renderchecker.setMapSettings(mapsettings) renderchecker.setControlPathPrefix('pointcloudrenderer') renderchecker.setControlName('expected_ramp_render_crs_transform') result = renderchecker.runTest('expected_ramp_render_crs_transform') TestQgsPointCloudAttributeByRampRenderer.report += renderchecker.report( ) self.assertTrue(result)
def style_land_cover_land_deg(outfile): layer_deg = iface.addRasterLayer(outfile, 'Land cover (degradation)') fcn = QgsColorRampShader() fcn.setColorRampType(QgsColorRampShader.EXACT) #TODO The GPG doesn't seem to allow for possibility of improvement...? lst = [ QgsColorRampShader.ColorRampItem(-1, QtGui.QColor(153, 51, 4), 'Degradation'), QgsColorRampShader.ColorRampItem(0, QtGui.QColor(246, 246, 234), 'Stable'), QgsColorRampShader.ColorRampItem(1, QtGui.QColor(0, 140, 121), 'Improvement') ] fcn.setColorRampItemList(lst) shader = QgsRasterShader() shader.setRasterShaderFunction(fcn) pseudoRenderer = QgsSingleBandPseudoColorRenderer(layer_deg.dataProvider(), 1, shader) layer_deg.setRenderer(pseudoRenderer) layer_deg.triggerRepaint() iface.legendInterface().refreshLayerSymbology(layer_deg)
def setStyle(self, layer): provider = layer.dataProvider() extent = layer.extent() stats = provider.bandStatistics(1, QgsRasterBandStats.All, extent, 0) if stats.minimumValue < 0: min = 0 else: min = stats.minimumValue max = stats.maximumValue range = max - min add = range // 2 interval = min + add colDic = {'red': '#ff0000', 'yellow': '#ffff00', 'blue': '#0000ff'} valueList = [min, interval, max] lst = [QgsColorRampShader.ColorRampItem(valueList[0], QColor(colDic['red'])), QgsColorRampShader.ColorRampItem(valueList[1], QColor(colDic['yellow'])), QgsColorRampShader.ColorRampItem(valueList[2], QColor(colDic['blue']))] myRasterShader = QgsRasterShader() myColorRamp = QgsColorRampShader() myColorRamp.setColorRampItemList(lst) myColorRamp.setColorRampType(QgsColorRampShader.INTERPOLATED) # TODO: add classificationMode=Continuos # myColorRamp.setClassificationMode(QgsColorRampShader.ClassificationMode(1)) # AttributeError: type object 'QgsColorRampShader' has no attribute 'setClassificationMode' myRasterShader.setRasterShaderFunction(myColorRamp) myPseudoRenderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), layer.type(), myRasterShader) layer.setRenderer(myPseudoRenderer) layer.triggerRepaint()
def setRasterStyle(self, raster_layer): shaderType = QgsColorRampShader() shaderType.setColorRampType(QgsColorRampShader.Discrete) item_list = [] item_list.append( QgsColorRampShader.ColorRampItem(1, QColor(0, 0, 0, 0), lbl="Sem visada")) item_list.append( QgsColorRampShader.ColorRampItem(1, QColor(0, 255, 0), lbl="Visível")) shaderType.setColorRampItemList(item_list) shader = QgsRasterShader() shader.setRasterShaderFunction(shaderType) renderer = QgsSingleBandPseudoColorRenderer( raster_layer.dataProvider(), 1, shader) raster_layer.setRenderer(renderer)
def testSingleBandPseudoColorRenderer_Interpolated(self): # get min and max of the band to renderer bandNo = 3 stats = self.raster_layer.dataProvider().bandStatistics(bandNo, QgsRasterBandStats.Min | QgsRasterBandStats.Max) minValue = stats.minimumValue maxValue = stats.maximumValue # create shader for the renderer shader = QgsRasterShader(minValue, maxValue) colorRampShaderFcn = QgsColorRampShader(minValue, maxValue) colorRampShaderFcn.setColorRampType(QgsColorRampShader.Interpolated) colorRampShaderFcn.setClassificationMode(QgsColorRampShader.Continuous) colorRampShaderFcn.setClip(True) items = [] for index in range(10): items.append(QgsColorRampShader.ColorRampItem(index, QColor('#{0:02d}{0:02d}{0:02d}'.format(index)), "{}".format(index))) colorRampShaderFcn.setColorRampItemList(items) shader.setRasterShaderFunction(colorRampShaderFcn) # create instance to test rasterRenderer = QgsSingleBandPseudoColorRenderer(self.raster_layer.dataProvider(), bandNo, shader) self.raster_layer.setRenderer(rasterRenderer) # do test dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertNoOpacity(root) self.assertChannelBand(root, 'sld:GrayChannel', '{}'.format(bandNo)) # check ColorMapEntry classes colorMap = root.elementsByTagName('sld:ColorMap') colorMap = colorMap.item(0).toElement() self.assertFalse(colorMap.isNull()) self.assertEqual(colorMap.attribute('type'), 'ramp') colorMapEntries = colorMap.elementsByTagName('sld:ColorMapEntry') self.assertEqual(colorMapEntries.count(), 10) for index in range(colorMapEntries.count()): colorMapEntry = colorMapEntries.at(index).toElement() self.assertEqual(colorMapEntry.attribute('quantity'), '{}'.format(index)) self.assertEqual(colorMapEntry.attribute('label'), '{}'.format(index)) self.assertEqual(colorMapEntry.attribute('opacity'), '') self.assertEqual(colorMapEntry.attribute('color'), '#{0:02d}{0:02d}{0:02d}'.format(index))
def save_pointwise_deficit_as_raster(self, iface, points_grid, end_date_index, save_file_path, layer_name): cols = len(points_grid[0]) rows = len(points_grid) originX = points_grid[0][0].qgsPoint.x() originY = points_grid[0][0].qgsPoint.y() #top-left driver = gdal.GetDriverByName('GTiff') outRaster = driver.Create(save_file_path, cols, rows, 1, gdal.GDT_Byte) outRaster.SetGeoTransform((originX, STEP, 0, originY, 0, STEP)) outband = outRaster.GetRasterBand(1) deficit_values_array = np.array([[ p.budget.PET_minus_AET_till_date[end_date_index] if not p.is_no_evaluation_point else -9999 for p in p_row ] for p_row in points_grid]) max_deficit = np.max(deficit_values_array) outband.WriteArray(deficit_values_array) outRasterSRS = osr.SpatialReference() outRasterSRS.ImportFromEPSG(32643) outRaster.SetProjection(outRasterSRS.ExportToWkt()) outband.FlushCache() layer = iface.addRasterLayer( save_file_path, layer_name + '_max_deficit_' + str(int(max_deficit))) layer.dataProvider().setNoDataValue(1, -9999) fcn = QgsColorRampShader() fcn.setColorRampType(QgsColorRampShader.INTERPOLATED) lst = [ QgsColorRampShader.ColorRampItem(0, QColor(240, 240, 240)), QgsColorRampShader.ColorRampItem(max_deficit, QColor(255, 0, 0)) ] fcn.setColorRampItemList(lst) shader = QgsRasterShader() shader.setRasterShaderFunction(fcn) renderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), 1, shader) layer.setRenderer(renderer) layer.triggerRepaint()
def loadLabelImage(imagepath, labeldescriptor = None): """ Load a labeled single band raster in the canvas Keyword arguments: imagepath -- the path to the image labeldescriptor -- a dictionnary for label (int) to tuple (QColor, QString) conversion """ if imagepath is None: return name = os.path.splitext( os.path.basename(imagepath) )[0] qgslayer = QgsRasterLayer(imagepath, name) if not qgslayer.isValid(): QtGui.QMessageBox.critical(None, u"Erreur", u"Impossible de charger la couche %s" % unicode(imagepath)) QgsMapLayerRegistry.instance().addMapLayer(qgslayer) qgslayer.setDrawingStyle('SingleBandPseudoColor') colorlist = [] max_label = 0 for label in sorted(labeldescriptor.keys()): color = labeldescriptor[label][0] labeltxt = labeldescriptor[label][1] colorlist.append(QgsColorRampShader.ColorRampItem(label, color, labeltxt)) if labeltxt > max_label: max_label = labeltxt s = QgsRasterShader() c = QgsColorRampShader() c.setColorRampType(QgsColorRampShader.INTERPOLATED) c.setColorRampItemList(colorlist) s.setRasterShaderFunction(c) ps = QgsSingleBandPseudoColorRenderer(qgslayer.dataProvider(), 1, s) qgslayer.setRenderer(ps) for bandNo in range(1,qgslayer.dataProvider().bandCount()+1): qgslayer.dataProvider().setUseSrcNoDataValue( bandNo, False ) QGisLayers.iface.legendInterface().refreshLayerSymbology(qgslayer) if hasattr(qgslayer, "setCacheImage"): qgslayer.setCacheImage(None) qgslayer.triggerRepaint()
def colormap(self): self.project.read('C:/Users/william/Documents/Qgis/example.qgs') #project = QgsProject.instance() path_to_tif = os.path.join(QgsProject.instance().homePath(), "qgis_sample_data", "raster", "SR_50M_alaska_nad.TIF") self.rlayer = QgsRasterLayer(path_to_tif) fcn = QgsColorRampShader() fcn.setColorRampType(QgsColorRampShader.Interpolated) lst = [ QgsColorRampShader.ColorRampItem(0, QColor(0, 25, 25)), QgsColorRampShader.ColorRampItem(255, QColor(255, 255, 0)) ] fcn.setColorRampItemList(lst) shader = QgsRasterShader() shader.setRasterShaderFunction(fcn) renderer = QgsSingleBandPseudoColorRenderer(self.rlayer.dataProvider(), 1, shader) self.rlayer.setRenderer(renderer) QgsProject.instance().addMapLayer(self.rlayer) QgsProject.instance().layerTreeRoot() QMessageBox.information(None, 'Example:', 'Colormap is loaded!')
def setRasterStyle(self, raster_layer, layer_values): shaderType = QgsColorRampShader() shaderType.setColorRampType(QgsColorRampShader.Discrete) item_list = [] j = 1 for i in list(layer_values.getFeatures()): color_temp = QColor(0, 0, 0) color_temp.setHsvF(j / layer_values.featureCount(), 1, 1) item_list.append( QgsColorRampShader.ColorRampItem(i[3], color_temp, lbl=str(i[0]))) j += 1 shaderType.setColorRampItemList(item_list) shader = QgsRasterShader() shader.setRasterShaderFunction(shaderType) renderer = QgsSingleBandPseudoColorRenderer( raster_layer.dataProvider(), 1, shader) raster_layer.setRenderer(renderer)
def runFilter(iface, dlg, conf, dir_dest, rasterSeuilName, rasterFilterName): # Passage des parametres pour le filtrage layer = filterRaster(dlg, conf, dir_dest, rasterSeuilName, rasterFilterName) if layer != None: # Informations de style canvas = iface.mapCanvas() QgsProject.instance().addMapLayer(layer) fcn = QgsColorRampShader() fcn.setColorRampType(QgsColorRampShader.Type.Exact) lst = [ QgsColorRampShader.ColorRampItem(1, QColor(QColor(255, 177, 67))) ] fcn.setColorRampItemList(lst) shader = QgsRasterShader() shader.setRasterShaderFunction(fcn) renderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), 1, shader) if renderer: layer.setRenderer(renderer) if layer.renderer(): layer.renderer().setOpacity(0.5) layer.triggerRepaint() setLayerVisible(layer, True) canvas.refresh() messInfo( dlg, "---> Lancez 'Filtrer' (fonction du radius choisi) pour appliquer un nouveau filtrage ou 'Vectoriser' pour poursuivre le traitement. <---" ) messInfo(dlg, "") QMessageBox.information(None, "Traitement de filtrage", " Filtrage terminé. ", QMessageBox.Ok, QMessageBox.NoButton) return
def displaced_people_style(layer): """Simple style to display a displaced count with a binary style. :param layer: The layer to style. :type layer: QgsRasterLayer """ color_ramp = QgsColorRampShader() color_ramp.setColorRampType(QgsColorRampShader.INTERPOLATED) color_ramp.setColorRampItemList(legend_raster_displaced) shader = QgsRasterShader() shader.setRasterShaderFunction(color_ramp) renderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), 1, shader) layer.setRenderer(renderer)
def apply_symbology(rlayer, symbology, transparent=None): """ Apply classification symbology to raster layer """ # See: QgsRasterRenderer* QgsSingleBandPseudoColorRendererWidget::renderer() # https://github.com/qgis/QGIS/blob/master/src/gui/raster/qgssinglebandpseudocolorrendererwidget.cpp # Get raster shader raster_shader = QgsRasterShader() # Color ramp shader color_ramp_shader = QgsColorRampShader() # Loop over Fmask values and add to color item list color_ramp_item_list = [] for name, value, color in symbology: # Color ramp item - color, label, value color_ramp_item = QgsColorRampShader.ColorRampItem( value, QColor(color[0], color[1], color[2], color[3]), name) color_ramp_item_list.append(color_ramp_item) # After getting list of color ramp items color_ramp_shader.setColorRampItemList(color_ramp_item_list) # Exact color ramp color_ramp_shader.setColorRampType('EXACT') # Add color ramp shader to raster shader raster_shader.setRasterShaderFunction(color_ramp_shader) # Create color renderer for raster layer renderer = QgsSingleBandPseudoColorRenderer(rlayer.dataProvider(), 1, raster_shader) # Set renderer for raster layer rlayer.setRenderer(renderer) # Set NoData transparency to layer qgis (temporal) if transparent is not None: if not isinstance(transparent, list): transparent = [transparent] nodata = [QgsRasterRange(t, t) for t in transparent] if nodata: rlayer.dataProvider().setUserNoDataValue(1, nodata) # Repaint if hasattr(rlayer, 'setCacheImage'): rlayer.setCacheImage(None) rlayer.triggerRepaint()
def setLayerSymbology(layer, qmlFilename): styleFilepath = os.path.dirname(__file__) + os.sep + 'styles' + os.sep + qmlFilename layer.loadNamedStyle(styleFilepath) # getting statistics from the layer stats = layer.dataProvider().bandStatistics(1, QgsRasterBandStats.All, layer.extent()) min = stats.minimumValue max = stats.maximumValue # adjusting the symbology to equal intervals from the renderer = layer.renderer() shader = renderer.shader() colorRampShader = shader.rasterShaderFunction() if type(colorRampShader) is QgsColorRampShader: colorRampItemList = colorRampShader.colorRampItemList() nbClasses = len(colorRampItemList) newColorRampList = [] for i in range(0,nbClasses): val = min + (i*(max-min)/(nbClasses-1)) item = QgsColorRampShader.ColorRampItem(val, (colorRampItemList[i]).color, str(val)) newColorRampList.append(item) colorRampShader.setColorRampItemList(newColorRampList) layer.triggerRepaint()
def set_color_heatmap_symbology(layer: QgsRasterLayer, color: QtGui.QColor): provider = layer.dataProvider() renderer = layer.renderer() color_ramp_items = __get_color_ramp_items(renderer, provider, color) color_ramp = QgsColorRampShader() color_ramp.setColorRampItemList(color_ramp_items) color_ramp.setColorRampType(QgsColorRampShader.Interpolated) raster_shader = QgsRasterShader() raster_shader.setRasterShaderFunction(color_ramp) renderer = QgsSingleBandPseudoColorRenderer( layer.dataProvider(), layer.type(), raster_shader ) layer.setBlendMode(QPainter.CompositionMode_Multiply) layer.setRenderer(renderer)
def getRenderer(self, layer_data_provider, color_map): """ Get QgsSingleBandPseudoColorRenderer for NDVI display. :param layer_data_provider: layer data provider :type: QgsDataProvider :param color_map: color list :type: [ColorRampItem...] :return: QgsSingleBandPseudoColorRenderer """ self.LOGGER.debug("getting renderer") raster_shader = QgsRasterShader() color_ramp_shader = QgsColorRampShader() color_ramp_shader.setColorRampType(QgsColorRampShader.DISCRETE) color_ramp_shader.setColorRampItemList(color_map) raster_shader.setRasterShaderFunction(color_ramp_shader) return QgsSingleBandPseudoColorRenderer(layer_data_provider, 1, raster_shader)
def render(self): t_0 = self.dlg.threshold_0_slider.value() / (10.0**self.precision) t_1 = self.dlg.threshold_1_slider.value() / (10.0**self.precision) t_2 = self.dlg.threshold_2_slider.value() / (10.0**self.precision) base = self.dlg.base_slider.value() / (10.0**self.precision) lst = [ QgsColorRampShader.ColorRampItem(t_0 - base, self.CLEAR), QgsColorRampShader.ColorRampItem(t_0, self.t_0_COLOR), QgsColorRampShader.ColorRampItem(t_1, self.t_1_COLOR), QgsColorRampShader.ColorRampItem(t_2, self.t_2_COLOR), ] self.fcn = QgsColorRampShader() self.fcn.setColorRampType(QgsColorRampShader.Interpolated) self.fcn.setColorRampItemList(lst) self.shader = QgsRasterShader() self.shader.setRasterShaderFunction(self.fcn) self.renderer = QgsSingleBandPseudoColorRenderer( self.layer.dataProvider(), 1, self.shader) self.layer.setRenderer(self.renderer) self.layer.triggerRepaint()
MMI_2 = QColor('#209fff') MMI_3 = QColor('#00cfff') MMI_4 = QColor('#55ffff') MMI_5 = QColor('#aaffff') MMI_6 = QColor('#fff000') MMI_7 = QColor('#ffa800') MMI_8 = QColor('#ff7000') MMI_9 = QColor('#ff0000') MMI_10 = QColor('#dd0000') MMI_11 = QColor('#880000') MMI_12 = QColor('#440000') # Displaced people raster after an EQ raster. The first item is the value in # the raster. legend_raster_displaced = [ QgsColorRampShader.ColorRampItem(0, transparent, tr('Not Displaced')), QgsColorRampShader.ColorRampItem(1, QColor('#a53c12'), tr('Displaced')), ] # Colors used in reporting. affected_column_background = QColor('#fff8e9') charcoal_black = QColor('#36454F') # Map legend templates according to standards : # https://github.com/inasafe/inasafe/issues/3653#issuecomment-275011957 # The space between count and exposure_unit will be automatically added if # the unit is not empty. template_without_thresholds = u'{name} ({count}{exposure_unit})' template_with_maximum_thresholds = ( u'{name} <= {max} {hazard_unit} ({count}{exposure_unit})') template_with_minimum_thresholds = (
def idw_interpolation(layer, parent_dialog): """Run interpolation using inverse distance weight algorithm :param layer: Vector layer with drivetimes :type layer: QgsVectorLayer :param parent_dialog: A dialog that called this function. :type parent_dialog: QProgressDialog :returns raster_layer: Interpolated raster layer with drivetimes :rtype raster_layer: QgsRasterLayer """ raster_layer = None try: Processing.initialize() Processing.updateAlgsList() output_raster = processing.runalg( 'gdalogr:gridinvdist', layer, 'minutes', 2, 0, 0, 0, 0, 0, 0, 0, 5, "[temporary file]") output_file = output_raster['OUTPUT'] file_info = QFileInfo(output_file) base_name = file_info.baseName() # retrieving the raster output , styling it and load it in Qgis raster_layer = QgsRasterLayer(output_file, base_name) except Exception as exception: # pylint: disable=broad-except # noinspection PyCallByClass,PyTypeChecker,PyArgumentList if parent_dialog: display_warning_message_box( parent_dialog, parent_dialog.tr( 'Error'), parent_dialog.tr('Error loading isochrone map,' 'please check if you have processing ' 'plugin installed ')) else: display_warning_message_box( parent_dialog, 'Error', 'Error loading isochrone map,' 'please check if you have processing ' 'plugin installed ') if raster_layer: if raster_layer.isValid(): color_shader = QgsColorRampShader() color_shader.setColorRampType(QgsColorRampShader.INTERPOLATED) colors = { 'deep_green': '#1a9641', 'light_green': '#a6d96a', 'pale_yellow': '#ffffc0', 'light_red': '#fdae61', 'red': '#d7191c' } provider = raster_layer.dataProvider() stats = provider.bandStatistics( 1, QgsRasterBandStats.All, raster_layer.extent(), 0) values = {} if stats: min = stats.minimumValue max = stats.maximumValue stat_range = max - min add = stat_range / 4 values[0] = min value = min for index in range(1, 4): value += add values[index] = value values[4] = max else: display_warning_message_box( parent_dialog, parent_dialog.tr( 'Error'), parent_dialog.tr('Error loading isochrone map' ' Problem indexing the isochrones map')) color_list = [ QgsColorRampShader.ColorRampItem( values[0], QColor(colors['deep_green'])), QgsColorRampShader.ColorRampItem( values[1], QColor(colors['light_green'])), QgsColorRampShader.ColorRampItem( values[2], QColor(colors['pale_yellow'])), QgsColorRampShader.ColorRampItem( values[3], QColor(colors['light_red'])), QgsColorRampShader.ColorRampItem( values[4], QColor(colors['red'])) ] color_shader.setColorRampItemList(color_list) raster_shader = QgsRasterShader() raster_shader.setRasterShaderFunction(color_shader) renderer = QgsSingleBandPseudoColorRenderer( raster_layer.dataProvider(), 1, raster_shader) raster_layer.setRenderer(renderer) else: if parent_dialog: display_warning_message_box( parent_dialog, parent_dialog.tr( 'Problem'), parent_dialog.tr('Problem styling the isochrone map')) else: display_warning_message_box( parent_dialog, 'Problem', 'Problem styling the isochrone map') QgsMapLayerRegistry.instance().addMapLayers([raster_layer]) else: if parent_dialog: display_warning_message_box( parent_dialog, parent_dialog.tr( 'Error'), parent_dialog.tr('Error loading isochrone map ' 'Could not load interpolated file!')) else: display_warning_message_box( parent_dialog, 'Error', 'Error loading isochrone map ' 'Could not load interpolated file!') return raster_layer
def _setNewRasterStyle(theQgsRasterLayer, theClasses): """Set QGIS raster style based on InaSAFE style dictionary for QGIS >= 2.0. This function will set both the colour map and the transparency for the passed in layer. Args: * theQgsRasterLayer: QgsRasterLayer * theClasses: List of the form as in the example below. Returns: * list: RangeList * list: TransparencyList Example: style_classes = [dict(colour='#38A800', quantity=2, transparency=0), dict(colour='#38A800', quantity=5, transparency=50), dict(colour='#79C900', quantity=10, transparency=50), dict(colour='#CEED00', quantity=20, transparency=50), dict(colour='#FFCC00', quantity=50, transparency=34), dict(colour='#FF6600', quantity=100, transparency=77), dict(colour='#FF0000', quantity=200, transparency=24), dict(colour='#7A0000', quantity=300, transparency=22)] """ # Note imports here to prevent importing on unsupported QGIS versions # pylint: disable=E0611 # pylint: disable=W0621 # pylint: disable=W0404 from qgis.core import (QgsRasterShader, QgsColorRampShader, QgsSingleBandPseudoColorRenderer, QgsRasterTransparency) # pylint: enable=E0611 # pylint: enable=W0621 # pylint: enable=W0404 myRampItemList = [] myTransparencyList = [] LOGGER.debug(theClasses) for myClass in theClasses: LOGGER.debug('Evaluating class:\n%s\n' % myClass) if 'quantity' not in myClass: LOGGER.exception('Class has no quantity attribute') continue myMax = myClass['max'] if math.isnan(myMax): LOGGER.debug('Skipping class - max is nan.') continue myMin = myClass['min'] if math.isnan(myMin): LOGGER.debug('Skipping class - min is nan.') continue myColour = QtGui.QColor(myClass['colour']) myLabel = QtCore.QString() if 'label' in myClass: myLabel = QtCore.QString(myClass['label']) myRampItem = QgsColorRampShader.ColorRampItem(myMax, myColour, myLabel) myRampItemList.append(myRampItem) # Create opacity entries for this range myTransparencyPercent = 0 if 'transparency' in myClass: myTransparencyPercent = int(myClass['transparency']) if myTransparencyPercent > 0: # Check if range extrema are integers so we know if we can # use them to calculate a value range myPixel = QgsRasterTransparency.TransparentSingleValuePixel() myPixel.min = myMin # We want it just a leeetle bit smaller than max # so that ranges are discrete myPixel.max = myMax myPixel.percentTransparent = myTransparencyPercent myTransparencyList.append(myPixel) myBand = 1 # gdal counts bands from base 1 LOGGER.debug('Setting colour ramp list') myRasterShader = QgsRasterShader() myColorRampShader = QgsColorRampShader() myColorRampShader.setColorRampType(QgsColorRampShader.INTERPOLATED) myColorRampShader.setColorRampItemList(myRampItemList) LOGGER.debug('Setting shader function') myRasterShader.setRasterShaderFunction(myColorRampShader) LOGGER.debug('Setting up renderer') myRenderer = QgsSingleBandPseudoColorRenderer( theQgsRasterLayer.dataProvider(), myBand, myRasterShader) LOGGER.debug('Assigning renderer to raster layer') theQgsRasterLayer.setRenderer(myRenderer) LOGGER.debug('Setting raster transparency list') myRenderer = theQgsRasterLayer.renderer() myTransparency = QgsRasterTransparency() myTransparency.setTransparentSingleValuePixelList(myTransparencyList) myRenderer.setRasterTransparency(myTransparency) # For interest you can also view the list like this: #pix = t.transparentSingleValuePixelList() #for px in pix: # print 'Min: %s Max %s Percent %s' % ( # px.min, px.max, px.percentTransparent) LOGGER.debug('Saving style as default') theQgsRasterLayer.saveDefaultStyle() LOGGER.debug('Setting raster style done!') return myRampItemList, myTransparencyList
class RasterSymbolizer(QgsRasterLayer): def __init__(self, layer): self.colDic = {'tan':'#ffebb0', 'green':'#267300', 'brown':'#734d00', 'white':'#ffffff', 'red':'#e60000', 'light gray':'#f0f0f0', 'blue':'#004cab'} self.shader = QgsRasterShader() self.ramp = QgsColorRampShader() self.colLst = [] self.valLst = [] self.labLst = [] self.opacity = 1.0 self.layer = layer self.provider = layer.dataProvider() extent = layer.extent() self.ver = self.provider.hasStatistics(1, QgsRasterBandStats.All) self.stats = self.provider.bandStatistics(1, QgsRasterBandStats.All, extent, 0) def render_GCD(self, type): self.setRendererOptions(type) self.shader.setRasterShaderFunction(self.ramp) renderer = QgsSingleBandPseudoColorRenderer(self.layer.dataProvider(), 1, self.shader) self.layer.setRenderer(renderer) self.layer.renderer().setOpacity(self.opacity) self.layer.triggerRepaint() def setRendererOptions(self, type): if type == "DEM": self.setValueBreaks_DEM() self.setColorRamp_DEM() elif type == "DoD": self.setValueBreaks_DoD() self.setColorRamp_DoD() elif type == "Slope_deg": self.setValueBreaks_SlopeDeg() self.setColorRamp_Slope() elif type == "Slope_per": self.setValueBreaks_SlopePer() self.setColorRamp_Slope() elif type == "Roughness": self.setValueBreaks_Roughness() self.setColorRamp_Roughness() def setValueBreaks_DEM(self): lo = self.stats.minimumValue hi = self.stats.maximumValue rng = hi - lo interval = rng/3.0 self.valLst = [lo, lo+interval, hi-interval, hi] def setValueBreaks_DoD(self): nClasses = 20 lo = self.stats.minimumValue hi = self.stats.maximumValue mid = 0.0 if abs(lo) > abs(hi): hi = abs(lo) else: lo = hi*-1.0 rng = hi*2.0 interval = rng/(nClasses*1.0) nRound = self.magnitude(rng) if nRound < 0: nRound = abs(nRound) + 2 else: nRound = 2 self.valLst.append(lo) for i in range(1,nClasses+1,1): self.valLst.append(lo + i*interval) self.labLst.append(str(round(self.valLst[i-1], nRound))+" to "+str(round(self.valLst[i], nRound))) def setValueBreaks_SlopeDeg(self): self.valLst.append(self.stats.minimumValue) self.valLst.append(2.0) self.valLst.append(5.0) self.valLst.append(10.0) self.valLst.append(15.0) self.valLst.append(25.0) self.valLst.append(35.0) self.valLst.append(45.0) self.valLst.append(60.0) self.valLst.append(80.0) self.labLst.append("0 to 2") self.labLst.append("2 to 5") self.labLst.append("5 to 10") self.labLst.append("10 to 15") self.labLst.append("15 to 25") self.labLst.append("25 to 35") self.labLst.append("35 to 45") self.labLst.append("45 to 60") self.labLst.append("60 to 80") self.labLst.append("80 to 90") def setValueBreaks_SlopePer(self): self.valLst.append(0.0) self.valLst.append(3.5) self.valLst.append(8.75) self.valLst.append(15.0) self.valLst.append(25.0) self.valLst.append(45.0) self.valLst.append(70.0) self.valLst.append(100.0) self.valLst.append(175.0) self.valLst.append(565.0) self.labLst.append("0 to 3.5%") self.labLst.append("3.5% to 8.75%") self.labLst.append("8.75% to 15%") self.labLst.append("15% to 25%") self.labLst.append("25% to 45%") self.labLst.append("45% to 70%") self.labLst.append("70% to 100%") self.labLst.append("100% to 175%") self.labLst.append("175% to 565%") self.labLst.append("> 565%") def setValueBreaks_Roughness(self): self.valLst.append(0) self.valLst.append(2) self.valLst.append(16) self.valLst.append(64) self.valLst.append(256) self.labLst.append("Fines, Sand (0 to 2 mm)") self.labLst.append("Fine Gravel (2 mm to 16 mm)") self.labLst.append("Coarse Gravel (16 mm to 64 mm)") self.labLst.append("Cobbles (64 mm to 256 mm)") self.labLst.append("Boulders (> 256 mm)") def setColorRamp_DEM(self): self.colLst = [QgsColorRampShader.ColorRampItem(self.valLst[0], QColor(self.colDic['tan']), str(self.valLst[0])), QgsColorRampShader.ColorRampItem(self.valLst[1], QColor(self.colDic['green']), str(self.valLst[1])), QgsColorRampShader.ColorRampItem(self.valLst[2], QColor(self.colDic['brown']), str(self.valLst[2])), QgsColorRampShader.ColorRampItem(self.valLst[3], QColor(self.colDic['white']), str(self.valLst[3]))] self.ramp.setColorRampItemList(self.colLst) self.ramp.setColorRampType(QgsColorRampShader.INTERPOLATED) self.opacity = 0.6 def setColorRamp_DoD(self): self.colLst = [QgsColorRampShader.ColorRampItem(self.valLst[0], QColor(230,0,0), self.labLst[0]), QgsColorRampShader.ColorRampItem(self.valLst[1], QColor(235,45,23), self.labLst[1]), QgsColorRampShader.ColorRampItem(self.valLst[2], QColor(240,67,41), self.labLst[2]), QgsColorRampShader.ColorRampItem(self.valLst[3], QColor(242,88,61), self.labLst[3]), QgsColorRampShader.ColorRampItem(self.valLst[4], QColor(245,108,81), self.labLst[4]), QgsColorRampShader.ColorRampItem(self.valLst[5], QColor(245,131,105), self.labLst[5]), QgsColorRampShader.ColorRampItem(self.valLst[6], QColor(245,151,130), self.labLst[6]), QgsColorRampShader.ColorRampItem(self.valLst[7], QColor(242,171,155), self.labLst[7]), QgsColorRampShader.ColorRampItem(self.valLst[8], QColor(237,190,180), self.labLst[8]), QgsColorRampShader.ColorRampItem(self.valLst[9], QColor(230,208,207), self.labLst[9]), QgsColorRampShader.ColorRampItem(self.valLst[10], QColor(218,218,224), self.labLst[10]), QgsColorRampShader.ColorRampItem(self.valLst[11], QColor(197,201,219), self.labLst[11]), QgsColorRampShader.ColorRampItem(self.valLst[12], QColor(176,183,214), self.labLst[12]), QgsColorRampShader.ColorRampItem(self.valLst[13], QColor(155,166,207), self.labLst[13]), QgsColorRampShader.ColorRampItem(self.valLst[14], QColor(135,150,201), self.labLst[14]), QgsColorRampShader.ColorRampItem(self.valLst[15], QColor(110,131,194), self.labLst[15]), QgsColorRampShader.ColorRampItem(self.valLst[16], QColor(92,118,189), self.labLst[16]), QgsColorRampShader.ColorRampItem(self.valLst[17], QColor(72,105,184), self.labLst[17]), QgsColorRampShader.ColorRampItem(self.valLst[18], QColor(49,91,176), self.labLst[18]), QgsColorRampShader.ColorRampItem(self.valLst[19], QColor(2,7,168), self.labLst[19])] self.ramp.setColorRampItemList(self.colLst) self.ramp.setColorRampType(QgsColorRampShader.DISCRETE) def setColorRamp_Slope(self): self.colLst = [QgsColorRampShader.ColorRampItem(self.valLst[0], QColor(255,235,176), self.labLst[0]), QgsColorRampShader.ColorRampItem(self.valLst[1], QColor(255,219,135), self.labLst[1]), QgsColorRampShader.ColorRampItem(self.valLst[2], QColor(255,202,97), self.labLst[2]), QgsColorRampShader.ColorRampItem(self.valLst[3], QColor(255,186,59), self.labLst[3]), QgsColorRampShader.ColorRampItem(self.valLst[4], QColor(255,170,0), self.labLst[4]), QgsColorRampShader.ColorRampItem(self.valLst[5], QColor(255,128,0), self.labLst[5]), QgsColorRampShader.ColorRampItem(self.valLst[6], QColor(255,85,0), self.labLst[6]), QgsColorRampShader.ColorRampItem(self.valLst[7], QColor(255,42,0), self.labLst[7]), QgsColorRampShader.ColorRampItem(self.valLst[8], QColor(161,120,120), self.labLst[8]), QgsColorRampShader.ColorRampItem(self.valLst[9], QColor(130,10,130), self.labLst[9])] self.ramp.setColorRampItemList(self.colLst) self.ramp.setColorRampType(QgsColorRampShader.DISCRETE) def setColorRamp_Roughness(self): self.colLst = [QgsColorRampShader.ColorRampItem(self.valLst[0], QColor(194,82,60), self.labLst[0]), QgsColorRampShader.ColorRampItem(self.valLst[1], QColor(240,180,17), self.labLst[1]), QgsColorRampShader.ColorRampItem(self.valLst[2], QColor(123,237,0), self.labLst[2]), QgsColorRampShader.ColorRampItem(self.valLst[3], QColor(27,168,124), self.labLst[3]), QgsColorRampShader.ColorRampItem(self.valLst[4], QColor(11,44,122), self.labLst[4])] def magnitude(self, x): return int(math.floor(math.log10(x)))
def testSingleBandPseudoColorRenderer_Interpolated(self): # get min and max of the band to renderer bandNo = 3 stats = self.raster_layer.dataProvider().bandStatistics( bandNo, QgsRasterBandStats.Min | QgsRasterBandStats.Max) minValue = stats.minimumValue maxValue = stats.maximumValue # create shader for the renderer shader = QgsRasterShader(minValue, maxValue) colorRampShaderFcn = QgsColorRampShader(minValue, maxValue) colorRampShaderFcn.setColorRampType(QgsColorRampShader.Interpolated) colorRampShaderFcn.setClassificationMode(QgsColorRampShader.Continuous) colorRampShaderFcn.setClip(True) items = [] for index in range(10): items.append( QgsColorRampShader.ColorRampItem( index, QColor('#{0:02d}{0:02d}{0:02d}'.format(index)), "{}".format(index))) colorRampShaderFcn.setColorRampItemList(items) shader.setRasterShaderFunction(colorRampShaderFcn) # create instance to test rasterRenderer = QgsSingleBandPseudoColorRenderer( self.raster_layer.dataProvider(), bandNo, shader) self.raster_layer.setRenderer(rasterRenderer) # do test dom, root = self.rendererToSld(self.raster_layer.renderer()) self.assertNoOpacity(root) self.assertChannelBand(root, 'sld:GrayChannel', '{}'.format(bandNo)) # check ColorMapEntry classes colorMap = root.elementsByTagName('sld:ColorMap') colorMap = colorMap.item(0).toElement() self.assertFalse(colorMap.isNull()) self.assertEqual(colorMap.attribute('type'), 'ramp') colorMapEntries = colorMap.elementsByTagName('sld:ColorMapEntry') self.assertEqual(colorMapEntries.count(), 10) for index in range(colorMapEntries.count()): colorMapEntry = colorMapEntries.at(index).toElement() self.assertEqual(colorMapEntry.attribute('quantity'), '{}'.format(index)) self.assertEqual(colorMapEntry.attribute('label'), '{}'.format(index)) self.assertEqual(colorMapEntry.attribute('opacity'), '') self.assertEqual(colorMapEntry.attribute('color'), '#{0:02d}{0:02d}{0:02d}'.format(index))
def set_raster_style(raster_layer, style): """Set QGIS raster style based on InaSAFE style dictionary for QGIS >= 2.0. This function will set both the colour map and the transparency for the passed in layer. :param raster_layer: A QGIS raster layer that will be styled. :type raster_layer: QgsVectorLayer :param style: List of the form as in the example below. :type style: list Example:: style_classes = [dict(colour='#38A800', quantity=2, transparency=0), dict(colour='#38A800', quantity=5, transparency=50), dict(colour='#79C900', quantity=10, transparency=50), dict(colour='#CEED00', quantity=20, transparency=50), dict(colour='#FFCC00', quantity=50, transparency=34), dict(colour='#FF6600', quantity=100, transparency=77), dict(colour='#FF0000', quantity=200, transparency=24), dict(colour='#7A0000', quantity=300, transparency=22)] :returns: A two tuple containing a range list and a transparency list. :rtype: (list, list) """ # Note imports here to prevent importing on unsupported QGIS versions # pylint: disable=E0611 # pylint: disable=W0621 # pylint: disable=W0404 # noinspection PyUnresolvedReferences from qgis.core import (QgsRasterShader, QgsColorRampShader, QgsSingleBandPseudoColorRenderer, QgsRasterTransparency) # pylint: enable=E0611 # pylint: enable=W0621 # pylint: enable=W0404 ramp_item_list = [] transparency_list = [] LOGGER.debug(style) for style_class in style: LOGGER.debug('Evaluating class:\n%s\n' % style_class) if 'quantity' not in style_class: LOGGER.exception('Class has no quantity attribute') continue class_max = style_class['max'] if math.isnan(class_max): LOGGER.debug('Skipping class - max is nan.') continue class_min = style_class['min'] if math.isnan(class_min): LOGGER.debug('Skipping class - min is nan.') continue colour = QtGui.QColor(style_class['colour']) label = '' if 'label' in style_class: label = style_class['label'] # noinspection PyCallingNonCallable ramp_item = QgsColorRampShader.ColorRampItem(class_max, colour, label) ramp_item_list.append(ramp_item) # Create opacity entries for this range transparency_percent = 0 if 'transparency' in style_class: transparency_percent = int(style_class['transparency']) if transparency_percent > 0: # Check if range extrema are integers so we know if we can # use them to calculate a value range # noinspection PyCallingNonCallable pixel = QgsRasterTransparency.TransparentSingleValuePixel() pixel.min = class_min # We want it just a little bit smaller than max # so that ranges are discrete pixel.max = class_max # noinspection PyPep8Naming pixel.percentTransparent = transparency_percent transparency_list.append(pixel) band = 1 # gdal counts bands from base 1 LOGGER.debug('Setting colour ramp list') raster_shader = QgsRasterShader() color_ramp_shader = QgsColorRampShader() color_ramp_shader.setColorRampType(QgsColorRampShader.INTERPOLATED) color_ramp_shader.setColorRampItemList(ramp_item_list) LOGGER.debug('Setting shader function') raster_shader.setRasterShaderFunction(color_ramp_shader) LOGGER.debug('Setting up renderer') renderer = QgsSingleBandPseudoColorRenderer( raster_layer.dataProvider(), band, raster_shader) LOGGER.debug('Assigning renderer to raster layer') raster_layer.setRenderer(renderer) LOGGER.debug('Setting raster transparency list') renderer = raster_layer.renderer() transparency = QgsRasterTransparency() transparency.setTransparentSingleValuePixelList(transparency_list) renderer.setRasterTransparency(transparency) # For interest you can also view the list like this: # pix = t.transparentSingleValuePixelList() # for px in pix: # print 'Min: %s Max %s Percent %s' % ( # px.min, px.max, px.percentTransparent) LOGGER.debug('Saving style as default') raster_layer.saveDefaultStyle() LOGGER.debug('Setting raster style done!') return ramp_item_list, transparency_list
def create_raster_layer(matrix): driver = gdal.GetDriverByName("GTiff") filename = tempfile.mktemp(prefix="hmtk", suffix=".tif") # sort the data by lon, lat gridded_data = numpy.array( sorted(matrix, key=lambda row: (90 + row[1]) * 180 + (180 + row[0]))) # extract it into separate vars lons, lats, vals = ( gridded_data[:, 0], gridded_data[:, 1], gridded_data[:, 3]) ncols = lons[lons == lons[0]].size nrows = lats[lats == lats[0]].size # put values in a grid gridded_vals = vals.reshape((ncols, nrows)).T dataset = driver.Create(filename, ncols, nrows, 1, gdal.GDT_Float32) dataset.SetGeoTransform(( min(lons), (max(lons) - min(lons)) / ncols, 0, max(lats), 0, -(max(lats) - min(lats)) / nrows)) out_srs = osr.SpatialReference() out_srs.ImportFromEPSG(4326) dataset.SetProjection(out_srs.ExportToWkt()) out_band = dataset.GetRasterBand(1) out_band.WriteArray(gridded_vals) out_band.SetNoDataValue(0) out_band.FlushCache() out_band = None dataset = None fileInfo = QFileInfo(filename) baseName = fileInfo.baseName() layer = QgsRasterLayer(filename, baseName) stat = layer.dataProvider().bandStatistics(1) minVal = stat.minimumValue maxVal = stat.maximumValue entries_nr = 20 colorRamp = QgsStyleV2().defaultStyle().colorRamp("Spectral") currentValue = float(minVal) intervalDiff = float(maxVal - minVal) / float(entries_nr - 1) colorRampItems = [] for i in reversed(xrange(entries_nr)): item = QgsColorRampShader.ColorRampItem() item.value = currentValue item.label = unicode(currentValue) currentValue += intervalDiff item.color = colorRamp.color(float(i) / float(entries_nr)) item.color.setAlphaF(0.75) colorRampItems.append(item) rasterShader = QgsRasterShader() colorRampShader = QgsColorRampShader() colorRampShader.setColorRampItemList(colorRampItems) colorRampShader.setColorRampType(QgsColorRampShader.INTERPOLATED) rasterShader.setRasterShaderFunction(colorRampShader) layer.setDrawingStyle('SingleBandPseudoColor') layer.renderer().setShader(rasterShader) QgsMapLayerRegistry.instance().addMapLayer(layer) return layer
def testShaderCrash(self): """Check if we assign a shader and then reassign it no crash occurs.""" myPath = os.path.join(unitTestDataPath('raster'), 'band1_float32_noct_epsg4326.tif') myFileInfo = QFileInfo(myPath) myBaseName = myFileInfo.baseName() myRasterLayer = QgsRasterLayer(myPath, myBaseName) myMessage = 'Raster not loaded: %s' % myPath assert myRasterLayer.isValid(), myMessage myRasterShader = QgsRasterShader() myColorRampShader = QgsColorRampShader() myColorRampShader.setColorRampType(QgsColorRampShader.Interpolated) myItems = [] myItem = QgsColorRampShader.ColorRampItem( 10, QColor('#ffff00'), 'foo') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem( 100, QColor('#ff00ff'), 'bar') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem( 1000, QColor('#00ff00'), 'kazam') myItems.append(myItem) myColorRampShader.setColorRampItemList(myItems) myRasterShader.setRasterShaderFunction(myColorRampShader) myPseudoRenderer = QgsSingleBandPseudoColorRenderer( myRasterLayer.dataProvider(), 1, myRasterShader) myRasterLayer.setRenderer(myPseudoRenderer) return # ####### works first time ############# myRasterShader = QgsRasterShader() myColorRampShader = QgsColorRampShader() myColorRampShader.setColorRampType(QgsColorRampShader.Interpolated) myItems = [] myItem = QgsColorRampShader.ColorRampItem(10, QColor('#ffff00'), 'foo') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem(100, QColor('#ff00ff'), 'bar') myItems.append(myItem) myItem = QgsColorRampShader.ColorRampItem(1000, QColor('#00ff00'), 'kazam') myItems.append(myItem) myColorRampShader.setColorRampItemList(myItems) myRasterShader.setRasterShaderFunction(myColorRampShader) # ####### crash on next line (fixed now)################## myPseudoRenderer = QgsSingleBandPseudoColorRenderer( myRasterLayer.dataProvider(), 1, myRasterShader) myRasterLayer.setRenderer(myPseudoRenderer)
def _setNewRasterStyle(theQgsRasterLayer, theStyle): """Set QGIS raster style based on InaSAFE style dictionary for QGIS >= 2.0. This function will set both the colour map and the transparency for the passed in layer. Args: * theQgsRasterLayer: QgsRasterLayer * style: Dictionary of the form as in the example below. Returns: * list: RangeList * list: TransparencyList Example: style_classes = [dict(colour='#38A800', quantity=2, transparency=0), dict(colour='#38A800', quantity=5, transparency=50), dict(colour='#79C900', quantity=10, transparency=50), dict(colour='#CEED00', quantity=20, transparency=50), dict(colour='#FFCC00', quantity=50, transparency=34), dict(colour='#FF6600', quantity=100, transparency=77), dict(colour='#FF0000', quantity=200, transparency=24), dict(colour='#7A0000', quantity=300, transparency=22)] """ # Note imports here to prevent importing on unsupported QGIS versions # pylint: disable=E0611 # pylint: disable=W0621 # pylint: disable=W0404 from qgis.core import (QgsRasterShader, QgsColorRampShader, QgsSingleBandPseudoColorRenderer, QgsRasterTransparency) # pylint: enable=E0611 # pylint: enable=W0621 # pylint: enable=W0404 myClasses = theStyle['style_classes'] myRampItemList = [] myTransparencyList = [] myLastValue = 0 for myClass in myClasses: LOGGER.debug('Evaluating class:\n%s\n' % myClass) myMax = myClass['quantity'] if math.isnan(myMax): LOGGER.debug('Skipping class.') continue myColour = QtGui.QColor(myClass['colour']) myLabel = QtCore.QString() if 'label' in myClass: myLabel = QtCore.QString(myClass['label']) myRampItem = QgsColorRampShader.ColorRampItem(myMax, myColour, myLabel) myRampItemList.append(myRampItem) # Create opacity entries for this range myTransparencyPercent = 0 if 'transparency' in myClass: myTransparencyPercent = int(myClass['transparency']) if myTransparencyPercent > 0: # Check if range extrema are integers so we know if we can # use them to calculate a value range myPixel = QgsRasterTransparency.TransparentSingleValuePixel() myPixel.min = myLastValue myPixel.max = myMax myPixel.percentTransparent = myTransparencyPercent myTransparencyList.append(myPixel) myLastValue = myMax myBand = 1 # gdal counts bands from base 1 LOGGER.debug('Setting colour ramp list') myRasterShader = QgsRasterShader() myColorRampShader = QgsColorRampShader() myColorRampShader.setColorRampType(QgsColorRampShader.INTERPOLATED) myColorRampShader.setColorRampItemList(myRampItemList) LOGGER.debug('Setting shader function') myRasterShader.setRasterShaderFunction(myColorRampShader) LOGGER.debug('Setting up renderer') myRenderer = QgsSingleBandPseudoColorRenderer( theQgsRasterLayer.dataProvider(), myBand, myRasterShader) LOGGER.debug('Assigning renderer to raster layer') theQgsRasterLayer.setRenderer(myRenderer) LOGGER.debug('Setting raster transparency list') #if len(myTransparencyList) > 0: # myRasterTransparency = QgsRasterTransparency() # myRasterTransparency.setTransparentSingleValuePixelList( # myTransparencyList) # myRenderer.setRasterTransparency(myRasterTransparency) LOGGER.debug('Saving style as default') theQgsRasterLayer.saveDefaultStyle() LOGGER.debug('Setting raster style done!') return myRampItemList, myTransparencyList