def test_getRasterFileCrs(self):
rast_crs = getCRSfromRasterFile(os.path.realpath(
this_dir + r"/data/rasters/area1_rgbi_jan_50cm_84sutm54.tif"))
self.assertEqual(rast_crs.epsg_number, None)
self.assertEqual(rast_crs.crs_wkt, None)
rast_crs = getCRSfromRasterFile(os.path.normpath(self.singletif))
self.assertEqual(rast_crs.epsg_number, 28354)
self.assertEqual(rast_crs.crs_wkt, rasterio.crs.CRS.from_epsg(28354).wkt)
def test11_rescaleNormaliseRaster(self):
in_file = self.gridextract_files[-1]
rast_crs = crs.getCRSfromRasterFile(in_file)
with rasterio.open(os.path.normpath(in_file)) as src:
rescaled = rescale(src, 0, 255)
rescaled2 = rescale(src, 0, 5)
norm = normalise(src)
out_meta = src.meta.copy()
out_meta['crs'] = rast_crs.crs_wkt
out_meta['count'] = 1 # contains only one band
out_meta['dtype'] = np.float32
out_rescale = os.path.join(TmpDir,
os.path.basename(in_file).replace('.tif', '_rescale0-255.tif'))
with rasterio.open(os.path.normpath(out_rescale), 'w', **out_meta) as out:
out.write_band(1, rescaled)
out_normalised = os.path.join(TmpDir,
os.path.basename(in_file).replace('.tif', '_normalised.tif'))
with rasterio.open(os.path.normpath(out_normalised), 'w', **out_meta) as out:
out.write_band(1, rescaled2)
self.assertAlmostEqual(2.0000722408294678, float(np.nanmax(norm)), 4)
self.assertAlmostEqual(-2.266947031021118, float(np.nanmin(norm)), 4)
self.assertEqual(0, np.nanmin(rescaled) )
self.assertEqual(255, np.nanmax(rescaled))
self.assertEqual(0, np.nanmin(rescaled2))
self.assertEqual(5, np.nanmax(rescaled2))
def test08_randomPixelSelection(self):
global rand_gdf, rand_crs
out_randompts = os.path.join(TmpDir,
os.path.basename(fileBlockTif).replace('.tif', '_randpts.shp'))
rast_crs = crs.getCRSfromRasterFile(fileBlockTif)
with rasterio.open(os.path.normpath(fileBlockTif)) as raster:
rand_gdf, rand_crs = random_pixel_selection(raster, rast_crs,
50, out_shapefile=out_randompts)
self.assertEqual(len(rand_gdf), 50)
self.assertTrue(os.path.exists(out_randompts))
self.assertEqual(rast_crs.epsg, rand_gdf.crs)
def accept(self, *args, **kwargs):
if not self.validate():
return False
try:
QtGui.qApp.setOverrideCursor(QtGui.QCursor(QtCore.Qt.WaitCursor))
write_setting(PLUGIN_NAME + "/" + self.toolKey + "/LastSize", self.dsbSize.value())
LOGGER.info('{st}\nProcessing {}'.format(self.windowTitle(), st='*' * 50))
self.iface.mainWindow().statusBar().showMessage('Processing {}'.format(self.windowTitle()))
# Add settings to log
settingsStr = 'Parameters:---------------------------------------'
settingsStr += '\n {:30}\t{}'.format('Sample Size:', self.dsbSize.value())
settingsStr += '\n {:30}\t{}'.format('Layer:', self.mcboTargetLayer.currentLayer().name())
settingsStr += '\n {:30}\t{}'.format('Output Shapefile:', self.lneSaveFile.text())
LOGGER.info(settingsStr)
lyrTarget = self.mcboTargetLayer.currentLayer()
removeFileFromQGIS(self.lneSaveFile.text())
raster_file = lyrTarget.source()
rasterCRS = pyprecag_crs.getCRSfromRasterFile(raster_file)
if rasterCRS.epsg is None:
rasterCRS.getFromEPSG(lyrTarget.crs().authid())
with rasterio.open(os.path.normpath(raster_file)) as src:
processing.random_pixel_selection(src, rasterCRS, int(self.dsbSize.value()), self.lneSaveFile.text())
lyrPts = addVectorFileToQGIS(self.lneSaveFile.text(), atTop=True,
layer_name=os.path.splitext(os.path.basename(self.lneSaveFile.text()))[0])
QtGui.qApp.restoreOverrideCursor()
self.iface.mainWindow().statusBar().clearMessage()
return super(RandomPixelSelectionDialog, self).accept(*args, **kwargs)
except Exception as err:
QtGui.qApp.restoreOverrideCursor()
self.iface.mainWindow().statusBar().clearMessage()
self.cleanMessageBars(True)
self.send_to_messagebar(str(err), level=QgsMessageBar.CRITICAL, duration=0, addToLog=True,
exc_info=sys.exc_info())
return False # leave dialog open