aws.osml.gdal.gdal_offset_provider module

class aws.osml.gdal.gdal_offset_provider.GDALOffsetProvider(offset_path: str, scale_factor: float = 1.0, tol: float = 1e-06)

Bases: ElevationOffsetProvider

Provide WGS84 offsets from any raster format supported by GDAL.

Notes

Reads the datatype as signed even if unsigned. Assumes a GDAL GeoTransform is provided, which must be independent in x and y (only scale / offset). Also assumes single raster.

get_offset(geodetic_world_coordinate: GeodeticWorldCoordinate) → float

Interpolate a WGS84 offset from the grid. Raise a ValueError if the coordinate is outside the grid.

Parameters:

geodetic_world_coordinate – a normalized world coordinate of interest

Returns:

meters above WGS84 ellipsoid