topic Simple Raster Calculator Problem in ArcGIS Spatial Analyst Questions

Simple Raster Calculator Problem

BreeWitteveen — Tue, 25 Sep 2012 17:27:13 GMT

I am trying to remove negative values in a depth raster that I created. I'm sure it's quite simple to do, but I'm new to using Raster Calculator and cannot seem to get the syntax right. What is the correct syntax for returning values greater than or equal to zero for a raster "depth_layer"?

Thanks!

Re: Simple Raster Calculator Problem

MarcinGasior — Wed, 26 Sep 2012 06:32:14 GMT

If you want to turn values below 0 into NoData and leave the rest untouched try this expression in Raster Calculator:

SetNull("depth_layer" < 0, "depth_layer")

If you want to change values below 0 into some value (eg. 0) try this:

Con("depth_layer" < 0, 0,"depth_layer")

If you want to just see which values are below 0 use simply:

"depth_layer" < 0

Re: Simple Raster Calculator Problem

ALI78671 — Sun, 31 Oct 2021 07:47:57 GMT

Sir, i am applying your method of negative values to no data, it works, but the range of values to the positive side is increasing every time from 0 to some value higher than the original positive value of the raster file.