utils.CoordinateTransformer.polygon_from_local_coords

CoordinateTransformer.polygon_from_local_coords(polygon: Polygon) → Polygon

Transform polygon from local coordinates to geographic coordinates.

Parameters:

polygon – Shapely polygon.

Returns:

x – Shapely polygon in geographic coordinates.

Examples

>>> from seismostats.utils import CoordinateTransformer
>>> from shapely.geometry import Polygon

>>> ref_easting = 2642690
>>> ref_northing = 1205590
>>> ct = CoordinateTransformer(2056, ref_easting, ref_northing)
>>> polygon = Polygon([(0, 0), (0, 111000), (111000, 111000)])
>>> external_polygon = ct.polygon_from_local_coords(polygon)
>>> x, y = external_polygon.exterior.xy
>>> x
array('d', [7.999928695956813, 8.010557432492037,
    9.497252799712923, 7.999928695956813])
>>> y
array('d', [46.99999566074669, 47.99827972304315,
    47.98154598785103, 46.99999566074669])