def run(self, *args, **kwargs): """ Run the command: Acquire USGS DEM data. Arguments: coverage -- string Source dataset from which DEM tile should be extracted. outfile -- string The name of the DEM file to be written. File extension ".tif" will be added. demResolution list<float>[2] Two floating point numbers representing the desired X and Y output resolution of soil property raster maps; unit: meters. srs -- string Target spatial reference system of output, in EPSG:num format. verbose -- boolean Produce verbose output. Default: False. overwrite -- boolean Overwrite existing output. Default: False. """ coverage = kwargs.get('coverage', self.DEFAULT_COVERAGE) outfile = kwargs.get('outfile', None) demResolution = kwargs.get('demResolution', None) srs = kwargs.get('srs', None) verbose = kwargs.get('verbose', False) overwrite = kwargs.get('overwrite', False) self.checkMetadata() bbox = bboxFromString(self.studyArea['bbox_wgs84']) if not outfile: outfile = 'DEM' demFilename = "%s.tif" % (outfile) demResolutionX = demResolutionY = None if demResolution: demResolutionX = demResolution[0] demResolutionY = demResolution[1] if srs: if not isValidSrs(srs): msg = "ERROR: '%s' is not a valid spatial reference. Spatial reference must be of the form 'EPSG:XXXX', e.g. 'EPSG:32617'. For more information, see: http://www.spatialreference.org/" % (srs,) raise RunException(msg) else: # Default for UTM (centerLon, centerLat) = calculateBoundingBoxCenter(bbox) (utmZone, isNorth) = getUTMZoneFromCoordinates(centerLon, centerLat) srs = getEPSGStringForUTMZone(utmZone, isNorth) try: (dataFetched, urlFetched) = ecohydrolib.usgs.demwcs.getDEMForBoundingBox(self.context.config, self.context.projectDir, demFilename, bbox, srs, coverage=coverage, resx=demResolutionX, resy=demResolutionY, scale=0.01, overwrite=overwrite, verbose=verbose, outfp=self.outfp) except Exception as e: traceback.print_exc(file=self.outfp) raise RunException(e) if not dataFetched: raise RunException("Failed to download DEM data from URL {0}".format(urlFetched)) # Write metadata entries cmdline = GenericMetadata.getCommandLine() # Write metadata demFilepath = os.path.join(self.context.projectDir, demFilename) demSrs = getSpatialReferenceForRaster(demFilepath) GenericMetadata.writeStudyAreaEntry(self.context, 'dem_res_x', demSrs[0]) GenericMetadata.writeStudyAreaEntry(self.context, 'dem_res_y', demSrs[1]) GenericMetadata.writeStudyAreaEntry(self.context, 'dem_srs', srs) # Get rows and columns for DEM (columns, rows) = getDimensionsForRaster(demFilepath) GenericMetadata.writeStudyAreaEntry(self.context, 'dem_columns', columns) GenericMetadata.writeStudyAreaEntry(self.context, 'dem_rows', rows) # Write provenance asset = AssetProvenance(GenericMetadata.MANIFEST_SECTION) asset.name = 'dem' asset.dcIdentifier = demFilename asset.dcSource = urlFetched asset.dcTitle = "Digital Elevation Model ({0})".format(coverage) asset.dcPublisher = 'U.S. Geological Survey' asset.dcDescription = cmdline asset.processingNotes = "Elevation values rescaled from centimeters to meters. " asset.processingNotes += "Spatial grid resampled to {srs} with X resolution {xres} and Y resolution {yres}." asset.processingNotes = asset.processingNotes.format(srs=srs, xres=demSrs[0], yres=demSrs[1]) asset.writeToMetadata(self.context) # Write processing history GenericMetadata.appendProcessingHistoryItem(self.context, cmdline)
# Get study area parameters studyArea = GenericMetadata.readStudyAreaEntries(context) bbox = bboxFromString(studyArea['bbox_wgs84']) # Determine target spatial reference if args.t_srs: if not isValidSrs(args.t_srs): sys.exit( textwrap.fill( "ERROR: '%s' is not a valid spatial reference. Spatial reference must be of the form 'EPSG:XXXX', e.g. 'EPSG:32617'. For more information, see: http://www.spatialreference.org/" % (args.t_srs, ))) t_srs = args.t_srs else: # Default for UTM (centerLon, centerLat) = calculateBoundingBoxCenter(bbox) (utmZone, isNorth) = getUTMZoneFromCoordinates(centerLon, centerLat) t_srs = getEPSGStringForUTMZone(utmZone, isNorth) # Get DEM from DEMExplorer sys.stdout.write('Downloading DEM from Geoscience Australia web service...') sys.stdout.flush() tmpDEMFilename = "%s-TEMP.tif" % (outfile) (returnCode, demURL) = getDEMForBoundingBox(context.config, context.projectDir, tmpDEMFilename, bbox=bbox, coverage=args.demType, srs=t_srs) assert (returnCode) sys.stdout.write('done\n') tmpDEMFilepath = os.path.join(context.projectDir, tmpDEMFilename)
if os.path.exists(demFilepath): os.unlink(demFilepath) # Get study area parameters studyArea = GenericMetadata.readStudyAreaEntries(context) bbox = bboxFromString(studyArea['bbox_wgs84']) # Determine target spatial reference if args.t_srs: if not isValidSrs(args.t_srs): sys.exit(textwrap.fill("ERROR: '%s' is not a valid spatial reference. Spatial reference must be of the form 'EPSG:XXXX', e.g. 'EPSG:32617'. For more information, see: http://www.spatialreference.org/" % (args.t_srs,) ) ) t_srs = args.t_srs else: # Default for UTM (centerLon, centerLat) = calculateBoundingBoxCenter(bbox) (utmZone, isNorth) = getUTMZoneFromCoordinates(centerLon, centerLat) t_srs = getEPSGStringForUTMZone(utmZone, isNorth) # Get DEM from DEMExplorer sys.stdout.write('Downloading DEM from DEMExplorer...') sys.stdout.flush() tmpDEMFilename = "%s-TEMP.tif" % (outfile) (returnCode, demURL) = getDEMForBoundingBox(context.config, context.projectDir, tmpDEMFilename, bbox=bbox, coverage=args.demType, srs=t_srs) assert(returnCode) sys.stdout.write('done\n') tmpDEMFilepath = os.path.join(context.projectDir, tmpDEMFilename) demSrs = getSpatialReferenceForRaster(tmpDEMFilepath) resample = False if args.demResolution: