sdalsal

Received error messages extracting by attributes

Discussion created by sdalsal on Mar 23, 2014
Latest reply on Apr 2, 2014 by curtvprice
Hi everyone,

I have a raster dataset (NLCD2006 Land Cover raster from http://www.mrlc.gov/nlcd06_data.php) that I am working with. I tried to extract the portion of it using the "extract by attributes" in the spatial analyst. I received an error message using this method. My goal is to have a raster that only includes the Values :21,22,23,24,25,81,and 82. There are 290 rows in the raster dataset and I only need 7 rows.


Class                                         Value

Developed-Open Space                 21
Developed-Low Intensity         22
Developed-Medium Intensity         23
Developed-High Intensity         24
Pasture/Hay                         81
Cultivated Crops                         82


So I tried another way, I selected the rows and created a dataset in ASCII format, hoping to convert the ASCII to raster. I received error messages using that method as well.

My very end goal is to represent the % land use values on a county level. Once I can create the raster dataset I need, I want to use zonal statistics as table (using the raster and my study region shapefile) to calculate the % land use values for each county.

I would appreciate it if you can point to what I may be doing wrong or direct me to a better way of creating the raster dataset I need. I also attached some screenshots as well.

Thanks for your help in advance.

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