Zonal Histogram By Polygon Incorrect.

KarlSchrantz

Hello, 

I am using a 30meter raster of land use data that I have split into 4 classes.  I wish to count the number of cells within each class that reside within census tracts and counties as zones.

When I get the table from the Zonal Histogram at the county level It tells me that class 3 has 837 cells, but when I use the census tracts as the zone, each zone has over 1000 cells.

I am at my wits end and I have been trying to solve this for the better part of 3 days now.

I am using arc 10 sp4.  

Is there a work around for this?

Thanks

KarlSchrantz

Hello, 

I am using a 30meter raster of land use data that I have split into 4 classes.  I wish to count the number of cells within each class that reside within census tracts and counties as zones.

When I get the table from the Zonal Histogram at the county level It tells me that class 3 has 837 cells, but when I use the census tracts as the zone, each zone has over 1000 cells.

I am at my wits end and I have been trying to solve this for the better part of 3 days now.

I am using arc 10 sp4.  

Is there a work around for this?

Thanks

I tried exporting the tract polygons to a raster of the same cell size and used a snap raster in the environment settings.  Still same result if I use all of the tracts even in raster form it is not correct.  If i just have one tract raster if works fine.  WHY IS IT DOING THIS?!?!