JezK
Edit File: vec_tr_spat.py
#!/usr/bin/env python3 ############################################################################### # $Id$ # # Project: OGR Python samples # Purpose: Apply a transformation to all OGR geometries. # Author: Frank Warmerdam, warmerdam@pobox.com # ############################################################################### # Copyright (c) 2006, Frank Warmerdam <warmerdam@pobox.com> # # Permission is hereby granted, free of charge, to any person obtaining a # copy of this software and associated documentation files (the "Software"), # to deal in the Software without restriction, including without limitation # the rights to use, copy, modify, merge, publish, distribute, sublicense, # and/or sell copies of the Software, and to permit persons to whom the # Software is furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included # in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS # OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING # FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER # DEALINGS IN THE SOFTWARE. ############################################################################### import sys from osgeo import ogr ############################################################################# def Usage(): print("Usage: vec_tr_spat.py [-spat xmin ymin xmax ymax] infile outfile [layer]") print("") return 2 def main(argv=sys.argv): infile = None outfile = None layer_name = None i = 1 while i < len(argv): arg = argv[i] if arg == "-spat": s_minx = int(argv[i + 1]) s_miny = int(argv[i + 2]) s_maxx = int(argv[i + 3]) s_maxy = int(argv[i + 4]) i = i + 4 elif infile is None: infile = arg elif outfile is None: outfile = arg elif layer_name is None: layer_name = arg else: return Usage() i = i + 1 if outfile is None: return Usage() ############################################################################# # Open the datasource to operate on. in_ds = ogr.Open(infile, update=0) if layer_name is not None: in_layer = in_ds.GetLayerByName(layer_name) else: in_layer = in_ds.GetLayer(0) in_defn = in_layer.GetLayerDefn() ############################################################################# # Create output file with similar information. shp_driver = ogr.GetDriverByName("ESRI Shapefile") shp_driver.DeleteDataSource(outfile) shp_ds = shp_driver.CreateDataSource(outfile) shp_layer = shp_ds.CreateLayer( in_defn.GetName(), geom_type=in_defn.GetGeomType(), srs=in_layer.GetSpatialRef() ) in_field_count = in_defn.GetFieldCount() for fld_index in range(in_field_count): src_fd = in_defn.GetFieldDefn(fld_index) fd = ogr.FieldDefn(src_fd.GetName(), src_fd.GetType()) fd.SetWidth(src_fd.GetWidth()) fd.SetPrecision(src_fd.GetPrecision()) shp_layer.CreateField(fd) ############################################################################# # Apply spatial query. in_layer.SetSpatialFilterRect(s_minx, s_miny, s_maxx, s_maxy) ############################################################################# # Setup rect geometry to try intersect with. ring = ogr.Geometry(ogr.wkbLinearRing) ring.AddPoint_2D(s_minx, s_miny) ring.AddPoint_2D(s_maxx, s_miny) ring.AddPoint_2D(s_maxx, s_maxy) ring.AddPoint_2D(s_minx, s_maxy) ring.AddPoint_2D(s_minx, s_miny) filt_geom = ogr.Geometry(ogr.wkbPolygon) filt_geom.AddGeometry(ring) ############################################################################# # Process all features in input layer. in_feat = in_layer.GetNextFeature() while in_feat is not None: geom = in_feat.GetGeometryRef() if geom.Intersect(filt_geom) != 0: out_feat = ogr.Feature(feature_def=shp_layer.GetLayerDefn()) out_feat.SetFrom(in_feat) shp_layer.CreateFeature(out_feat) out_feat.Destroy() in_feat.Destroy() in_feat = in_layer.GetNextFeature() ############################################################################# # Cleanup shp_ds.Destroy() in_ds.Destroy() return 0 if __name__ == "__main__": sys.exit(main(sys.argv))