topic Re: using RECLASS in Raster calculator in ArcGIS Spatial Analyst Questions

using RECLASS in Raster calculator

Anonymous User — Sat, 08 May 2010 03:03:38 GMT

Folks:

I'm trying to do a reclass in raster calculator and having a heck of a time with it. You guys have been so very helpful and I"m grateful. Below are the facts (as I know them). Thanks to all those who can help.

Best,
Tom Mueller

This is the syntax that raster calculator provides:

Usage: (out_int_grid) RECLASS (<grid>, <remap_table>, {DATA | NODATA},
                     {in_item}, {out_item})

so I"m trying with the following text:

dork = RECLASS ( [avg_upslope3] , D:\Analysis_D\Dosskey_1\Attempt_4\test_d\remap.txt , NODATA )

The text file is attached and contains the following:

0         3.25 : 7
3.25    5.75 : 6
5.75    8.25 : 5
8.25 10.75 : 4
10.75   13.25 : 3
12.25    15.75 : 2
15.75    18.25 : 1
18.25     10000000 : 0

in item and out item are optional.... I don't think I need them here...????

Thanks,
Tom

Re: using RECLASS in Raster calculator

Anonymous User — Sat, 08 May 2010 14:55:08 GMT

Bill, you are brilliant. How the heck did you think of that..... Amazing. You are the man.

Re: using RECLASS in Raster calculator

Anonymous User — Sat, 08 May 2010 18:11:39 GMT

I had to modify the code a bit Bill:

sl_class = Min( 7, Max( 0, Int( (20.75 - [avg_up]) / 2.50 ) ) )

Amazing!

Re: using RECLASS in Raster calculator

Anonymous User — Mon, 10 May 2010 12:36:07 GMT

Thanks Dr. Huber.

I've done similar things in Excel but I had never ever thought of doing this with Map Algebra. This and some of your other answers have blown me away. I've ordered Tomlin's book from the library. Can't wait.

best,
Tom