Some datasets like Sentinel-1 GRD files don't have a coordinate reference system (crs), but they may have ground control points (gcps) and can still be opened by rasterio.

Need to reproject from a proper source coordinate reference system (src_crs) instead of arbitrarily.

Not very well written, but it's a start I guess. Synthetic GeoTIFF generation code modified from https://github.com/corteva/rioxarray/blob/bfd616594bb82886133b5f4b9356ed16d39014fc/test/integration/test_integration_rioxarray.py#L1053.

Put the src_crs in the vrt_params dict to avoid an elif statement.

It's not a good idea in dask to mutate inputs. This object could be shared with other tasks.

Also, I think we just need to check `ds.crs is None`—if `ds.crs` is a CRS, it will always have a `to_epsg` method. (Though that could fail, so I've added handling for that case too.)

The test is still failing for me though.

this also gets the test passing