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 testBasic(self):
renderer = QgsPointCloudAttributeByRampRenderer()
renderer.setAttribute('attr')
self.assertEqual(renderer.attribute(), 'attr')
renderer.setMinimum(5)
self.assertEqual(renderer.minimum(), 5)
renderer.setMaximum(15)
self.assertEqual(renderer.maximum(), 15)
ramp = QgsStyle.defaultStyle().colorRamp("Viridis")
shader = QgsColorRampShader(20, 30, ramp)
renderer.setColorRampShader(shader)
self.assertEqual(renderer.colorRampShader().minimumValue(), 20)
self.assertEqual(renderer.colorRampShader().maximumValue(), 30)
renderer.setMaximumScreenError(18)
renderer.setMaximumScreenErrorUnit(QgsUnitTypes.RenderInches)
renderer.setPointSize(13)
renderer.setPointSizeUnit(QgsUnitTypes.RenderPoints)
renderer.setPointSizeMapUnitScale(QgsMapUnitScale(1000, 2000))
rr = renderer.clone()
self.assertEqual(rr.maximumScreenError(), 18)
self.assertEqual(rr.maximumScreenErrorUnit(), QgsUnitTypes.RenderInches)
self.assertEqual(rr.pointSize(), 13)
self.assertEqual(rr.pointSizeUnit(), QgsUnitTypes.RenderPoints)
self.assertEqual(rr.pointSizeMapUnitScale().minScale, 1000)
self.assertEqual(rr.pointSizeMapUnitScale().maxScale, 2000)
self.assertEqual(rr.attribute(), 'attr')
self.assertEqual(rr.minimum(), 5)
self.assertEqual(rr.maximum(), 15)
self.assertEqual(rr.colorRampShader().minimumValue(), 20)
self.assertEqual(rr.colorRampShader().maximumValue(), 30)
self.assertEqual(rr.colorRampShader().sourceColorRamp().color1().name(),
renderer.colorRampShader().sourceColorRamp().color1().name())
self.assertEqual(rr.colorRampShader().sourceColorRamp().color2().name(),
renderer.colorRampShader().sourceColorRamp().color2().name())
doc = QDomDocument("testdoc")
elem = renderer.save(doc, QgsReadWriteContext())
r2 = QgsPointCloudAttributeByRampRenderer.create(elem, QgsReadWriteContext())
self.assertEqual(r2.maximumScreenError(), 18)
self.assertEqual(r2.maximumScreenErrorUnit(), QgsUnitTypes.RenderInches)
self.assertEqual(r2.pointSize(), 13)
self.assertEqual(r2.pointSizeUnit(), QgsUnitTypes.RenderPoints)
self.assertEqual(r2.pointSizeMapUnitScale().minScale, 1000)
self.assertEqual(r2.pointSizeMapUnitScale().maxScale, 2000)
self.assertEqual(r2.attribute(), 'attr')
self.assertEqual(r2.minimum(), 5)
self.assertEqual(r2.maximum(), 15)
self.assertEqual(r2.colorRampShader().minimumValue(), 20)
self.assertEqual(r2.colorRampShader().maximumValue(), 30)
self.assertEqual(r2.colorRampShader().sourceColorRamp().color1().name(),
renderer.colorRampShader().sourceColorRamp().color1().name())
self.assertEqual(r2.colorRampShader().sourceColorRamp().color2().name(),
renderer.colorRampShader().sourceColorRamp().color2().name())
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 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 apply_symbology(rlayer, symbology, symbology_enabled, transparent=255):
""" 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, enable in zip([
'Fmask Cloud', 'Fmask Shadow', 'Fmask Snow', 'Fmask Water',
'Blue Band', 'Cloud QA', 'Aerosol', 'Pixel QA'
], [2, 3, 4, 5, 6, 7, 8, 9], symbology_enabled):
if enable is False:
continue
color = symbology[name]
# 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)
# Add the NoData symbology
color_ramp_item_list.append(
QgsColorRampShader.ColorRampItem(255, QColor(70, 70, 70, 255),
"No Data"))
# Add the valid data, no masked
color_ramp_item_list.append(
QgsColorRampShader.ColorRampItem(1, QColor(0, 0, 0, 0), "No Masked"))
# 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 not isinstance(transparent, list):
transparent = [transparent]
nodata = [QgsRasterRange(t, t) for t in transparent]
if nodata:
rlayer.dataProvider().setUserNoDataValue(1, nodata)
# Set NoData transparency to file
#for t in transparent:
# rlayer.dataProvider().setNoDataValue(1, t)
# Repaint
if hasattr(rlayer, 'setCacheImage'):
rlayer.setCacheImage(None)
rlayer.triggerRepaint()
def changeLayerColorMap(self, layerId, colorMap):
layer = QgsMapLayerRegistry.instance().mapLayer(layerId)
provider = layer.dataProvider()
extent = layer.extent()
rampStops = colorMap.stops()
valueList = list()
colorList = list()
valueList.append(0.0)
colorList.append(colorMap.color1())
for item in rampStops:
valueList.append(item.offset)
colorList.append(item.color)
valueList.append(1.0)
colorList.append(colorMap.color2())
stats = provider.bandStatistics(1, QgsRasterBandStats.All, extent, 0)
Max = stats.maximumValue
Min = stats.minimumValue
statRange = Max - Min
valueList = self.add(self.multiply(valueList, statRange), Min)
ramplst = list()
rampItemStr = '<= ' + "%.3f" % valueList[0]
ramplst.append(
QgsColorRampShader.ColorRampItem(valueList[0], colorList[0],
rampItemStr))
for i in range(1, len(valueList)):
rampItemStr = "%.3f" % valueList[i -
1] + ' - ' "%.3f" % valueList[i]
ramplst.append(
QgsColorRampShader.ColorRampItem(valueList[i], colorList[i],
rampItemStr))
myRasterShader = QgsRasterShader()
myColorRamp = QgsColorRampShader()
myColorRamp.setColorRampItemList(ramplst)
if not colorMap.isDiscrete:
myColorRamp.setColorRampType(QgsColorRampShader.DISCRETE)
else:
myColorRamp.setColorRampType(QgsColorRampShader.INTERPOLATED)
myRasterShader.setRasterShaderFunction(myColorRamp)
myPseudoRenderer = QgsSingleBandPseudoColorRenderer(
layer.dataProvider(), layer.type(), myRasterShader)
layer.setRenderer(myPseudoRenderer)
layer.triggerRepaint()
def style_prod_traj_trend(outfile):
# Trends layer
layer_ndvi = iface.addRasterLayer(
outfile,
QtGui.QApplication.translate(
'LDMPPlugin',
'Productivity trajectory trend\n(slope of NDVI * 10000)'))
if not layer_ndvi.isValid():
log('Failed to add layer')
return None
provider = layer_ndvi.dataProvider()
# Set a colormap centred on zero, going to the extreme value significant to
# three figures (after a 2 percent stretch)
ds = gdal.Open(outfile)
band1 = np.array(ds.GetRasterBand(1).ReadAsArray())
band1[band1 >= 9997] = 0
ds = None
cutoffs = np.percentile(band1, [2, 98])
extreme = get_extreme(cutoffs[0], cutoffs[1])
fcn = QgsColorRampShader()
fcn.setColorRampType(QgsColorRampShader.INTERPOLATED)
lst = [
QgsColorRampShader.ColorRampItem(
-extreme, QtGui.QColor(153, 51, 4),
QtGui.QApplication.translate('LDMPPlugin',
'-{} (declining)').format(extreme)),
QgsColorRampShader.ColorRampItem(
0, QtGui.QColor(246, 246, 234),
QtGui.QApplication.translate('LDMPPlugin', '0 (stable)')),
QgsColorRampShader.ColorRampItem(
extreme, QtGui.QColor(0, 140, 121),
QtGui.QApplication.translate('LDMPPlugin',
'{} (increasing)').format(extreme)),
QgsColorRampShader.ColorRampItem(
9997, QtGui.QColor(0, 0, 0),
QtGui.QApplication.translate('LDMPPlugin', 'No data')),
QgsColorRampShader.ColorRampItem(
9998, QtGui.QColor(58, 77, 214),
QtGui.QApplication.translate('LDMPPlugin', 'Water')),
QgsColorRampShader.ColorRampItem(
9999, QtGui.QColor(192, 105, 223),
QtGui.QApplication.translate('LDMPPlugin', 'Urban land cover'))
]
fcn.setColorRampItemList(lst)
shader = QgsRasterShader()
shader.setRasterShaderFunction(fcn)
pseudoRenderer = QgsSingleBandPseudoColorRenderer(
layer_ndvi.dataProvider(), 1, shader)
layer_ndvi.setRenderer(pseudoRenderer)
layer_ndvi.triggerRepaint()
iface.legendInterface().refreshLayerSymbology(layer_ndvi)
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 __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 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 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 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 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 mkRasterShader(layer,
color_ramp,
classif_mode=QgsColorRampShader.Continuous):
min, med, max = getValuesFromLayer3(layer)
rasterShader = QgsRasterShader(minimumValue=min, maximumValue=max)
colorRamp = getRandomSingleColorRamp()
if not color_ramp:
utils.internal_error("Could not create color ramp")
colorRampShader = QgsColorRampShader(minimumValue=min,
maximumValue=max,
colorRamp=color_ramp,
classificationMode=classif_mode)
colorRampShader.classifyColorRamp(band=1, input=layer.dataProvider())
if colorRampShader.isEmpty():
utils.internal_error("Empty color ramp shader")
rasterShader.setRasterShaderFunction(colorRampShader)
return rasterShader
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 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 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 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 style_sdg_ld(outfile):
# Significance layer
layer = iface.addRasterLayer(outfile, QtGui.QApplication.translate('LDMPPlugin', 'Degradation (SDG 15.3 - without soil carbon)'))
if not layer.isValid():
log('Failed to add layer')
return None
fcn = QgsColorRampShader()
fcn.setColorRampType(QgsColorRampShader.EXACT)
lst = [QgsColorRampShader.ColorRampItem(-1, QtGui.QColor(153, 51, 4), QtGui.QApplication.translate('LDMPPlugin', 'Degradation')),
QgsColorRampShader.ColorRampItem(0, QtGui.QColor(246, 246, 234), QtGui.QApplication.translate('LDMPPlugin', 'Stable')),
QgsColorRampShader.ColorRampItem(1, QtGui.QColor(0, 140, 121), QtGui.QApplication.translate('LDMPPlugin', 'Improvement')),
QgsColorRampShader.ColorRampItem(2, QtGui.QColor(58, 77, 214), QtGui.QApplication.translate('LDMPPlugin', 'Water')),
QgsColorRampShader.ColorRampItem(3, QtGui.QColor(192, 105, 223), QtGui.QApplication.translate('LDMPPlugin', 'Urban land cover'))]
fcn.setColorRampItemList(lst)
shader = QgsRasterShader()
shader.setRasterShaderFunction(fcn)
pseudoRenderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), 1, shader)
layer.setRenderer(pseudoRenderer)
layer.triggerRepaint()
iface.legendInterface().refreshLayerSymbology(layer)
def style_prod_state_emerg(outfile):
# Significance layer
layer = iface.addRasterLayer(
outfile,
QtGui.QApplication.translate('LDMPPlugin',
'Productivity state (emerging)'))
if not layer.isValid():
return None
fcn = QgsColorRampShader()
fcn.setColorRampType(QgsColorRampShader.EXACT)
lst = [
QgsColorRampShader.ColorRampItem(
-2, QtGui.QColor(0, 0, 0),
QtGui.QApplication.translate('LDMPPlugin', 'No data')),
QgsColorRampShader.ColorRampItem(
-1, QtGui.QColor(153, 51, 4),
QtGui.QApplication.translate('LDMPPlugin',
'Significant decrease')),
QgsColorRampShader.ColorRampItem(
0, QtGui.QColor(246, 246, 234),
QtGui.QApplication.translate('LDMPPlugin',
'No significant change')),
QgsColorRampShader.ColorRampItem(
1, QtGui.QColor(0, 140, 121),
QtGui.QApplication.translate('LDMPPlugin',
'Significant increase')),
QgsColorRampShader.ColorRampItem(
2, QtGui.QColor(58, 77, 214),
QtGui.QApplication.translate('LDMPPlugin', 'Water')),
QgsColorRampShader.ColorRampItem(
3, QtGui.QColor(192, 105, 223),
QtGui.QApplication.translate('LDMPPlugin', 'Urban land cover'))
]
fcn.setColorRampItemList(lst)
shader = QgsRasterShader()
shader.setRasterShaderFunction(fcn)
pseudoRenderer = QgsSingleBandPseudoColorRenderer(layer.dataProvider(), 1,
shader)
layer.setRenderer(pseudoRenderer)
layer.triggerRepaint()
iface.legendInterface().refreshLayerSymbology(layer)
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 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 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 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 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 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 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 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)
