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cf241f51ae
- Script to pull bounds from EPSG.org Postgres dump - Add resources/data/world_map.shp for reference - Show canvas bounds for reference
57 lines
1.3 KiB
Python
57 lines
1.3 KiB
Python
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import os
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import sys
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import sqlite3 as sqlite
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def gen():
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db = sqlite.connect(":memory:")
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tablesfile = sys.argv[1]
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datafiles = sys.argv[2]
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with open(os.path.join("data", tablesfile)) as f:
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data = f.read()
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db.executescript(data)
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with open(os.path.join("data", datafiles)) as f:
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data = f.read()
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data = data.replace("CHR", "Char")
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db.executescript(data)
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query = """
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SELECT crs.coord_ref_sys_code,
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area_west_bound_lon,
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area_north_bound_lat,
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area_east_bound_lon,
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area_south_bound_lat
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FROM epsg_coordinatereferencesystem crs
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JOIN epsg_area area ON crs.area_of_use_code = area.area_code
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"""
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rows = db.execute(query)
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with open("resources/epsg_areas.csv", "w") as f:
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f.write("coord_sys_code, west_bound_lon, north_bound_lat, east_bound_lon, south_bound_lat\n")
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for row in rows:
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csv = ",".join(str(data) for data in row)
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f.write('{0}\n'.format(csv))
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def usage():
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print("""
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Generate the epsg_bounds.csv file to support viewing projection areas and bounds checks in QGIS.
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Usage:
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bounds_sync.py {table dump} {data dump}
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bounds_sync.py EPSG_v9_1.mdb_Tables_PostgreSQL.sql EPSG_v9_1.mdb_Data_PostgreSQL.sql
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""")
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if __name__ == "__main__":
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if len(sys.argv) < 3:
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usage()
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else:
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gen()
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