I am looking for some help on a problem I am running into.
I have a mosaic dataset of forest cover around the globe for the year 2000 (each cell's number contains the percent of forest cover in that area). I have randomly selected a large number of points that contain information from different sources (elevation, distance to city, etc) as well as the initial forest cover in 2000. I have also created 3km radius buffers for each point and want to calculate the average area in the buffer that is forested in 2000. To do this, I am using zonal statistics as table.
My problem is that zonal statistics returns NULL values for all buffers East of a particular footprint boundary in my mosaic dataset. I am wondering why this would be? Is it a problem with the rasters that make up the mosaic dataset? The mosaic dataset itself?
I have tried running this on a small subset of buffers and have the same problem (which indicates that it is not a problem of too many calculations). Also, extract values to points had no such problems.
Any advice or thoughts you have would be greatly appreciated.
أكثر...
I have a mosaic dataset of forest cover around the globe for the year 2000 (each cell's number contains the percent of forest cover in that area). I have randomly selected a large number of points that contain information from different sources (elevation, distance to city, etc) as well as the initial forest cover in 2000. I have also created 3km radius buffers for each point and want to calculate the average area in the buffer that is forested in 2000. To do this, I am using zonal statistics as table.
My problem is that zonal statistics returns NULL values for all buffers East of a particular footprint boundary in my mosaic dataset. I am wondering why this would be? Is it a problem with the rasters that make up the mosaic dataset? The mosaic dataset itself?
I have tried running this on a small subset of buffers and have the same problem (which indicates that it is not a problem of too many calculations). Also, extract values to points had no such problems.
Any advice or thoughts you have would be greatly appreciated.
أكثر...