POST
|
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.
... View more
03-23-2014
07:48 AM
|
0
|
3
|
1542
|
POST
|
Hi everyone, I have a raster dataset (NLCD2006 Land Cover raster from http://www.mrlc.gov/nlcd06_data.php) that I am working with to extract the portion of it using the extract by attributes in the spatial analyst. My goal is to create a raster dataset that includes the Values :21,22,23,24,25,81,and 82. I received error messages using this method. Out of 290 rows in the raster dataset, I only need 7 rows. 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. I would appreciate it if you can point to what I may be doing wrong or direct me to a better way of creating this raster dataset that includes only 7 rows. I also attached some screenshots as well just to give you an idea. Thanks for your help in advance.
... View more
03-22-2014
09:00 AM
|
0
|
0
|
2347
|
POST
|
Thanks for all your assistance in advance. I would appreciate all the help I can get as I am not an expert GIS user. I have a 12 state study region with 1042 counties. I like to be able to create a dataset that illustrates % land use at the county level. Using my study region shape file (county name, fips, state name, etc.) and NLCD 2006 raster files available at http://www.mrlc.gov/nlcd06_data.php, I would like to create something like this: State County FIPS developed (open space) developed (low intensity) pasture/hay cultivated crops impervious surface MI County 1 12% 2% 1% 5% 10% MI County 2 MI County 3 MI County 4 ... ... I was hoping to find the most direct and accurate route to represent the % land use values at the county level: (developed open space area / county area) x 100, etc. I tried zonal statistics table using 2006 NLCD Land Cover Change raster and my shape file, the results did provide statistics at a county level for all the changes, without identifying the land use categories. Thanks.
... View more
03-17-2014
12:24 PM
|
0
|
0
|
1428
|
Online Status |
Offline
|
Date Last Visited |
11-11-2020
02:23 AM
|