How does ArcMap determine minimum and maximum raster values (e.g. for rendering colour ramps) when a raster file lacks an auxiliary file (e.g. aux.xml) describing statistics?
This question is related to my previous question here, which describes a situation where, for GeoTiffs generated by
gdalwarp, ArcMap displayed the minimum as
268.048, while the true minimum was
Does ArcMap inspect an initial subset of cells, and set statistics based on those cells' values? If so, can this behaviour be prevented other than by ensuring auxiliary files are created and distributed with the raster? It seems like risky behaviour, since unless a user ensures that statistics have been fully calculated, rendered output might easily be misinterpreted.