hope someone knows what to do.
When i try to classify my raster layer ArcGis shows me an error.(translated from german) "Error while initializing the render "classify": possible reason: too many unique values"
Thanks for reading
you can't use unique then, you will have to regroup/reclassify the data. The average person can't distinguish more than about 20 colours/patterns anyway. what scenario would require that many classes anyway?
If you want classifying a raster , don't use Unique Values (as in the picture below )
unique values will give each cell value a color and any cell that has same value, and you will have thousands of colors. that not classify.
Using Stretched (recommended)
or classify a raster using Classified , and you will have to use a method to class the range of values ( don't let classes to be over than 10 class )
The problem is, when I click classified, arcMap says, that there are too much unique values(when I click on unique values, there are none listed). Streched works fine, but I need my output classified.
as I pointed out in a previous post, there is a limit, you will have to consolidate some of the classes. If you need 256+++ classes, then there is no point mapping it since no one is going to be able to distinguish anywhere near that. And before you think, moving to vector world, it can't be done either. You are going to have to rethink what it is you are trying to convey and how best to do it.