srtm_height_map#

pycraf.pathprof.srtm_height_map(lon_c, lat_c, map_size_lon, map_size_lat, map_resolution=<Quantity 3. arcsec>, hprof_step=None, do_cos_delta=True, do_coords_2d=False)[source]#

Extract terrain map from SRTM data.

Parameters:

lon_t, lat_tQuantity: Geographic longitude/latitude of map center [deg]
map_size_lon, map_size_latQuantity: Map size in longitude/latitude[deg]
map_resolutionQuantity, optional: Pixel resolution of map [deg] (default: 3 arcsec)
hprof_stepQuantity, optional: Pixel resolution of map [m] (default: None) Overrides map_resolution if given!
do_cos_deltabool, optional: If True, divide map_size_lon by cos(lat_c) to produce a more square-like map. (default: True)
do_coords_2dbool, optional: If True, return 2D coordinate arrays (default: False)

Returns:

lonsQuantity, 1D or 2D: Geographic longitudes [deg]
latsQuantity, 1D or 2D: Geographic latitudes [deg]
heightsQuantity, 1D or 2D: Height map [m]

Notes

SRTM data tiles (*.hgt) need to be accessible by pycraf. It is assumed that these are either present in the current working directory or in the path defined by the SRTMDATA environment variable (sub-directories are also parsed). Alternatively, use the SrtmConf manager to change the directory, where pycraf looks for SRTM data, during run-time. The SrtmConf manager also offers additional features such as automatic downloading of missing tiles or applying different interpolation methods (e.g., splines). For details see Working with SRTM data.