Divide raster by raster

Question

Hi everybody,

Sorry for my basic knowledge in the GIS world. I have problems in dividing raster layer by raster. I have two raster layers (say layer A and B) . Both layers have the same extent, projection, pixel size and pixel numbers. AND both have input integer. Value of layer A is always greater than value of layer B (in corresponding pixel). I tried to divide A by B and multiply by 100 using raster calculator in ArcGIS 9.2. The problem is here. I always get 0 and 100 (only two values) . In fact, I expected to have many values ranging from 0 to 100.

Thank you very much in advance.

njennings · Answer

No, the image is a subset of a Landsat image in Imagine format that is in a folder (c:	emp, for example).  The link I posted just a few minutes ago has a zip file that contains this image if you want to take a look.  6 bands in the image, unsigned integer values.

ESRI Confirmed my issue as a bug:

[#NIM073015  Raster calculator is giving incorrect output when dividing two image bands as floating point. ]

This bug will now be reviewed by our development team, and will take further action as necessary to address this issue. For updates on this issue, please see the Esri Customer Care Portal by going to https://customers.esri.com or contact Esri Support Services.

Cheers,
Nate

njennings · Answer

No, the image is a subset of a Landsat image in Imagine format that is in a folder (c:	emp, for example).  The link I posted just a few minutes ago has a zip file that contains this image if you want to take a look.  6 bands in the image, unsigned integer values.

DanPatterson_Retired · Answer

Just curious ... are these ESRI grids in a folder (ie c:\stuff) or in a gdb?