Python write_wkt Examples

Example #1

File: ch06-04_identity.py Project: Algotricx/python-geospatial-analysis-cookbook

    shp1 = realpath("../geodata/temp1-ply.shp")
    shp2 = realpath("../geodata/temp2-ply.shp")

    # output resulting GeoJSON file
    out_geojson_file = realpath("../geodata/result_identity.geojson")

    output_wkt_identity = realpath("ol3/data/ch06-04_results_identity.js")


    # convert our Shapefiles to GeoJSON
    # then to python dictionaries
    shp1_data = shp2_geojson_obj(shp1)
    shp2_data = shp2_geojson_obj(shp2)

    # transform our GeoJSON data into Shapely geom objects
    shp1_polys = create_polys(shp1_data)
    shp2_polys = create_polys(shp2_data)

    # run the difference and intersection
    res_difference = shp1_polys.difference(shp2_polys)
    res_intersection = shp1_polys.intersection(shp2_polys)

    # combine the difference and intersection polygons into results
    result_identity = create_out(res_difference, res_intersection)

    # export identity results to a GeoJSON
    out_geoj(result_identity, out_geojson_file)

    # write out new javascript variable with wkt geometry
    write_wkt(output_wkt_identity, result_identity )

Example #2

File: ch06-03_union_dissolve.py Project: sdhayalk/python-geospatial-analysis-cookbook

            # add valid geometry to list
            plys.append(g)
    # convert new polygons into a new MultiPolygon
    out_new_valid_multi = MultiPolygon(plys)
    return out_new_valid_multi


if __name__ == "__main__":

    # input NOAA Shapefile
    shp = realpath("../geodata/temp-all-warn-week.shp")

    # output union_dissolve results as GeoJSON
    out_geojson_file = realpath("../geodata/ch06-03_union_dissolve.geojson")

    out_wkt_js = realpath("ol3/data/ch06-03_results_union.js")

    # input Shapefile and convert to Shapely geometries
    shply_geom = create_shapes(shp)

    # Check the Shapely geometries if they are valid if not fix them
    new_valid_geom = check_geom(shply_geom)

    # run our union with dissolve
    dissolve_result = cascaded_union(new_valid_geom)

    # output the resulting union dissolved polygons to GeoJSON file
    out_geoj(dissolve_result, out_geojson_file)

    write_wkt(out_wkt_js, dissolve_result)

Example #3

File: ch06-04_identity.py Project: sdhayalk/python-geospatial-analysis-cookbook

    # out two input test Shapefiles
    shp1 = realpath("../geodata/temp1-ply.shp")
    shp2 = realpath("../geodata/temp2-ply.shp")

    # output resulting GeoJSON file
    out_geojson_file = realpath("../geodata/result_identity.geojson")

    output_wkt_identity = realpath("ol3/data/ch06-04_results_identity.js")

    # convert our Shapefiles to GeoJSON
    # then to python dictionaries
    shp1_data = shp2_geojson_obj(shp1)
    shp2_data = shp2_geojson_obj(shp2)

    # transform our GeoJSON data into Shapely geom objects
    shp1_polys = create_polys(shp1_data)
    shp2_polys = create_polys(shp2_data)

    # run the difference and intersection
    res_difference = shp1_polys.difference(shp2_polys)
    res_intersection = shp1_polys.intersection(shp2_polys)

    # combine the difference and intersection polygons into results
    result_identity = create_out(res_difference, res_intersection)

    # export identity results to a GeoJSON
    out_geoj(result_identity, out_geojson_file)

    # write out new javascript variable with wkt geometry
    write_wkt(output_wkt_identity, result_identity)