44 lines
1.3 KiB
Python
44 lines
1.3 KiB
Python
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from osgeo.osr import SpatialReference, CoordinateTransformation
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import shapefile
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epsg28992 = SpatialReference()
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epsg28992.ImportFromEPSG(28992)
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epsg28992.SetTOWGS84(565.237 ,50.0087 ,465.658 ,-0.406857 ,0.350733 ,-1.87035 ,4.0812)
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epsg4326 = SpatialReference()
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epsg4326.ImportFromEPSG(4326)
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rd2latlon = CoordinateTransformation(epsg28992, epsg4326)
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def rd_to_longlat(rd_multipolygon):
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if len(rd_multipolygon) == 2 and tuple(map(type, rd_multipolygon)) == (float, float):
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return list(rd2latlon.TransformPoint(*rd_multipolygon)[:2])
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return [
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rd_to_longlat(element)
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for element in rd_multipolygon
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]
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def shapefiles_to_geojson(filename):
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shape_file = shapefile.Reader(filename)
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fields = shape_file.fields[1:]
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field_names = [field[0] for field in fields]
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buffer = []
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for shape_record in shape_file.shapeRecords():
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properties = dict(zip(field_names, shape_record.record))
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geometry = shape_record.shape.__geo_interface__
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geometry['coordinates'] = rd_to_longlat(geometry['coordinates'])
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buffer.append({
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'type': "Feature",
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'geometry': geometry,
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'properties': properties
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})
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return {
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"type": "FeatureCollection",
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"features": buffer
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}
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