GDAL developers, I am working with netCDF files and GDAL, and we are in the process of determining the exact format of the netCDF files we will produce for the public to use. We are aware of the CF conventions for storing map parameters in the file, but what seems less well defined is how to represent the extent of the data in grid coordinates.
The netCDF driver in GDAL appears to use the terms northernmost_northing southernmost_northing westernmost_easting easternmost_easting to supply grid boundary coordinates, and I understand the information in these is redundant with the information stored in the attribute "GeoRef". My question is, what would be the impacts of changing these terms to something that makes sense more universally? These terms make no sense (are actually very confusing) in some situations, such as a south-up map near the south pole. We propose using terms such as grid_top_boundary_projected_y grid_bottom_boundary_projected_y grid_left_boundary_projected_x grid_right_boundary_projected_x Alternatively, grid corner coordinates could be used. What would the impacts of such a change of names in our files be? If the GeoRef field is also in the file, would it break existing software for being able to navigate (geolocate) the data? And, would the community consider the adoption of more universal terms more generally (i.e. in GDAL itself)? Thanks, Bruce Raup _______________________________________________ gdal-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/gdal-dev
