pynetdesign.modelling.io.global2local#

pynetdesign.modelling.io.global2local(latY, lonX, refLat=None, refLon=None)[source]#

Converts global latitude and longitude coordinates to Cartesian coordinates under a simple spherical Earth approximation.

Parameters:

latYnumpy.ndarray: An array of latitude coordinates in degrees.
lonXnumpy.ndarray: An array of longitude coordinates in degrees.
refLatfloat, optional: The reference latitude for the local coordinate system. If not provided, the average of the input latitude coordinates will be used.
refLonfloat, optional: The reference longitude for the local coordinate system. If not provided, the average of the input longitude coordinates will be used.

Returns:

x_local_coordslist: A list of local x coordinates in meters.
y_local_coordslist: A list of local y coordinates in meters.
refLatfloat: The reference latitude used for the local coordinate system.
refLonfloat: The reference longitude used for the local coordinate system.

Examples

>>> latY = np.array([37.7749, 34.0522, 40.7128])
>>> lonX = np.array([-122.4194, -118.2437, -74.0060])
>>> x_local_coords, y_local_coords, refLat, refLon = global2local(latY, lonX)