问使用Python和OGR/GDAL栅格化WKT面(来自geopandas)

EN

import geopandas as gpd
import ogr, osr
import gdal
import uuid

tf = r'f:test2.shp'

def vector_to_raster(source_layer, output_path, x_size, y_size, options, data_type=gdal.GDT_Byte):
    '''
    This method should create a raster object by burning the values of a source layer to values.
    '''

    x_min, x_max, y_min, y_max = source_layer.GetExtent()
    print(source_layer.GetExtent())
    x_resolution = int((x_max - x_min) / x_size)
    y_resolution = int((y_max - y_min) / -y_size)  
    print(x_resolution, y_resolution)

    target_ds = gdal.GetDriverByName(str('GTiff')).Create(output_path, x_resolution, y_resolution, 1, data_type)
    spatial_reference = source_layer.GetSpatialRef()         
    target_ds.SetProjection(spatial_reference.ExportToWkt())
    target_ds.SetGeoTransform((x_min, x_size, 0, y_max, 0, -y_size))
    gdal.RasterizeLayer(target_ds, [1], source_layer, options=options)
    target_ds.FlushCache()
    return target_ds


#create geopandas dataframe
gdf = gpd.read_file(tf)

#grab projection from the gdf
projection = gdf.crs['init']

#get geometry from 1 polygon (now just the 1st one)
polygon = gdf.loc[0].geometry 

#grab epsg from projection
epsg = int(projection.split(':')[1])

#create geometry
geom = ogr.CreateGeometryFromWkt(polygon.wkt)

#create spatial reference
proj = osr.SpatialReference()
proj.ImportFromEPSG(epsg) 

#get driver
rast_ogr_ds = ogr.GetDriverByName('Memory').CreateDataSource('wrk')

#create polylayer with projection
rast_mem_lyr = rast_ogr_ds.CreateLayer('poly', srs=proj)

#create feature
feat = ogr.Feature(rast_mem_lyr.GetLayerDefn())

#set geometry in feature
feat.SetGeometryDirectly(geom) 

#add feature to memory layer
rast_mem_lyr.CreateFeature(feat)

#create memory location
tif_output = '/vsimem/' + uuid.uuid4().hex + '.vrt'

#rasterize
lel = vector_to_raster(rast_mem_lyr, tif_output, 0.001, -0.001,['ATTRIBUTE=Shape__Len', 'COMPRESS=LZW', 'TILED=YES', 'NBITS=4'])

# output should consist of 0's and 1's
print(np.unique(lel.ReadAsArray()))