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# Copyright Crown and Cartopy Contributors
#
# This file is part of Cartopy and is released under the BSD 3-clause license.
# See LICENSE in the root of the repository for full licensing details.
"""
Provide support for converting EPSG codes to Projection instances.
"""
from pyproj.crs import CRS as _CRS
import cartopy.crs as ccrs
class _EPSGProjection(ccrs.Projection):
def __init__(self, code):
crs = _CRS.from_epsg(code)
if not crs.is_projected:
raise ValueError('EPSG code does not define a projection')
if not crs.area_of_use:
raise ValueError("Area of use not defined.")
self.epsg_code = code
super().__init__(crs.to_wkt())
def __repr__(self):
return f'_EPSGProjection({self.epsg_code})'
def __reduce__(self):
return self.__class__, (self.epsg_code, )
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