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92 lines
3.4 KiB
92 lines
3.4 KiB
# Copyright (c) 2022 PaddlePaddle Authors. All Rights Reserved. |
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# |
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# Licensed under the Apache License, Version 2.0 (the "License"); |
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# you may not use this file except in compliance with the License. |
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# You may obtain a copy of the License at |
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# |
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# http://www.apache.org/licenses/LICENSE-2.0 |
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# |
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# Unless required by applicable law or agreed to in writing, software |
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# distributed under the License is distributed on an "AS IS" BASIS, |
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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# See the License for the specific language governing permissions and |
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# limitations under the License. |
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import os |
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import os.path as osp |
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import numpy as np |
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import argparse |
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from PIL import Image |
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from utils import Raster, Timer |
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try: |
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from osgeo import gdal, ogr, osr |
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except ImportError: |
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import gdal |
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import ogr |
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import osr |
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def _mask2tif(mask_path, tmp_path, proj, geot): |
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mask = np.asarray(Image.open(mask_path)) |
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if len(mask.shape) == 3: |
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mask = mask[:, :, 0] |
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row, columns = mask.shape[:2] |
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driver = gdal.GetDriverByName("GTiff") |
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dst_ds = driver.Create(tmp_path, columns, row, 1, gdal.GDT_UInt16) |
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dst_ds.SetGeoTransform(geot) |
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dst_ds.SetProjection(proj) |
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dst_ds.GetRasterBand(1).WriteArray(mask) |
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dst_ds.FlushCache() |
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return dst_ds |
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def _polygonize_raster(mask_path, shp_save_path, proj, geot, ignore_index): |
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tmp_path = shp_save_path.replace(".shp", ".tif") |
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ds = _mask2tif(mask_path, tmp_path, proj, geot) |
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srcband = ds.GetRasterBand(1) |
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maskband = srcband.GetMaskBand() |
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gdal.SetConfigOption("GDAL_FILENAME_IS_UTF8", "YES") |
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gdal.SetConfigOption("SHAPE_ENCODING", "UTF-8") |
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ogr.RegisterAll() |
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drv = ogr.GetDriverByName("ESRI Shapefile") |
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if osp.exists(shp_save_path): |
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os.remove(shp_save_path) |
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dst_ds = drv.CreateDataSource(shp_save_path) |
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prosrs = osr.SpatialReference(wkt=ds.GetProjection()) |
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dst_layer = dst_ds.CreateLayer( |
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"Building boundary", geom_type=ogr.wkbPolygon, srs=prosrs) |
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dst_fieldname = "DN" |
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fd = ogr.FieldDefn(dst_fieldname, ogr.OFTInteger) |
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dst_layer.CreateField(fd) |
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gdal.Polygonize(srcband, maskband, dst_layer, 0, []) |
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lyr = dst_ds.GetLayer() |
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lyr.SetAttributeFilter("DN = '{}'".format(str(ignore_index))) |
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for holes in lyr: |
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lyr.DeleteFeature(holes.GetFID()) |
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dst_ds.Destroy() |
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ds = None |
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os.remove(tmp_path) |
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@Timer |
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def raster2shp(srcimg_path, mask_path, save_path, ignore_index=255): |
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src = Raster(srcimg_path) |
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_polygonize_raster(mask_path, save_path, src.proj, src.geot, ignore_index) |
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src = None |
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parser = argparse.ArgumentParser(description="input parameters") |
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parser.add_argument("--srcimg_path", type=str, required=True, \ |
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help="The path of original data with geoinfos.") |
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parser.add_argument("--mask_path", type=str, required=True, \ |
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help="The path of mask data.") |
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parser.add_argument("--save_path", type=str, default="output", \ |
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help="The path to save the results shapefile, `output` is the default.") |
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parser.add_argument("--ignore_index", type=int, default=255, \ |
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help="It will not be converted to the value of SHP, `255` is the default.") |
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if __name__ == "__main__": |
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args = parser.parse_args() |
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raster2shp(args.srcimg_path, args.mask_path, args.save_path, |
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args.ignore_index)
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