Bathymetry AssertionError
The function _check_in_bounds for file bathymetry.py is yielding an AssertionError due to not finding a valid raster for a pair of coordinates. That seems to happen when the coordinates are on the edge of the area covered by the raster. I believe changing lines 101 and 102 from bounds['w'] < lon < bounds['e'] and bounds['s'] < lat < bounds['n'] to bounds['w'] <= lon <= bounds['e'] and bounds['s'] <= lat <= bounds['n'] will fix the problem.