I need to clip a vector file based on certain values of a raster (Slope > 2%). I can´t find a direct way to do it.
Trying to vectorize the raster first didn´t work.
Is there an ArcGIS tool I could use that I haven´t found yet?
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The problem definitely was the size of the datasets.
Splitting up the huge dataset, doing the geoprocessing on the different parts and merging them back together afterwards worked without any problems.
Maybe datasets with several millions of features are just too much for ArcGIS to handle.
Your question does not say where the vector file is coming from.
On a side note, if you have access to ArcGIS Spatial Analyst extension, then you may be able to extract a subset of the raster using Raster Calculator. Here specifically you can use the "Con" (conditional evaluation) function.