topic Add rasters to mosaic dataset returns dem with -32768 and 32767 values in Data Management Questions

Add rasters to mosaic dataset returns dem with -32768 and 32767 values

StevenWernke — Mon, 19 Dec 2011 22:01:23 GMT

I have six ASTER GDEM tiles, projected to Mercator (World), saved as grid format, 16 bit signed integer files. All are clean (no sinks, holes, no negative values, etc).

I want to mosaic them to a single DEM, but when I try to add them to a mosaic dataset, the resulting raster has values that include a range from -32768 to 32767.

Any ideas? I've tried changing environmental settings, and a number of other things, but can't seem to figure out why it is returning a dem with junk cell values.

Thanks for any tips.

Re: Add rasters to mosaic dataset returns dem with -32768 and 32767 values

KyleShannon — Mon, 19 Dec 2011 22:03:25 GMT

Are there actual cells with those values? Try computing statistics on them.

Re: Add rasters to mosaic dataset returns dem with -32768 and 32767 values

RichardLaw1 — Wed, 18 Jan 2012 00:38:32 GMT

Have you checked your pixel type? Sounds like your mosaic raster is attempting to become 32-bit unsigned. Given your 16-bit inputs, make your output 16-bit too.

Re: Add rasters to mosaic dataset returns dem with -32768 and 32767 values

EricRice — Wed, 18 Jan 2012 14:48:53 GMT

Steve,

You have to calculate statistics on the mosaic dataset.

Regards,
Eric

Re: Add rasters to mosaic dataset returns dem with -32768 and 32767 values

MariekeZon — Fri, 22 Jul 2016 17:43:30 GMT

I just solved this issue by calculating the histograms in the symbology menu of layer properties.