using RECLASS in Raster calculator

[Anonymous User]

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

[Anonymous User]

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

[Anonymous User]

I had to modify the code a bit Bill:

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

Amazing!

[Anonymous User]

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