query raster in ArcGIS 10

Question

I am using ArcGIS 10 (includes spatial and geostatistical analyst). I have a raster (GRID) with a value range of -167 to 18. I would like to query the raster and create a new one with only the values between -117 and -69. I cannot figure out how to use the raster calculator to do this task. Any suggestions?

Answer 1

You can use the set null tool in the spatial analyst toolbox to assign any cell values outside your desired range to null values. The result will be a new raster layer with only the cell values you wish to preserve.

The expression you should use will be along the lines of:

Value > -117 AND Value < -69

and the false raster should be the same as your input raster, to keep values where the expression evaluates as false.

Answer 2

try to use 'reclassify raster' tool from Spatial Analyst http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z000000sr000000.htm