utils.CoordinateTransformer.polygon_to_local_coords#

CoordinateTransformer.polygon_to_local_coords(polygon: Polygon) → Polygon#

Transform polygon from geographic coordinates to local coordinates.

Parameters:: polygon – Shapely polygon.
Returns:: x – Shapely polygon in local 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([(8.0, 47.0), (8.0, 48.0), (9.0, 48.0)])
>>> local_polygon = ct.polygon_to_local_coords(polygon)
>>> x, y = local_polygon.exterior.xy
>>> x
array('d', [5.4201549254357815, -789.3621860183775,
    73841.78791614715, 5.4201549254357815])
>>> y
array('d', [0.5222872239537537, 111185.62139117694,
    112195.20617892314, 0.5222872239537537])