> On 27 Apr 2025, at 14.57, Greg Troxel via PROJ <proj@lists.osgeo.org> wrote: > > Javier Jimenez Shaw via PROJ <proj@lists.osgeo.org> writes: > >> What I did is using int16. The max error is 1.2 mm (if I did the maths >> correctly). The size with that change is about 24 MB >> If anybody wants even more accuracy, they can use int32. The reduction is >> smaller, but still less than 100 MB. > > It's hard to believe that there is true accuracy to 1 mm; that seems > state of the art for multi-year observations determining HAE at a > national reference station. But it might be nice to numerically match > NGS tools ~exactly as a check. >
That would indeed be nice. Almost required, I’d say. But it sort of seems like they have produced a grid file with a resolution that is too high. I get the feeling that some of you are in contact with the americans about this, maybe recommend them to reduce the resolution a bit. They won’t see much usage if they are too big too handle. Remember how problematic the Australian GB-sized grid files were before we found a way to compress them? /Kristian _______________________________________________ PROJ mailing list PROJ@lists.osgeo.org https://lists.osgeo.org/mailman/listinfo/proj
