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How to delete/remove nodata in Raster data?

Question asked by ChenXingbo on Oct 19, 2016

I used Extract by mask tool to clip a raster data with partial selected polygon feature, I expected to get the selected polygon extent as output extent, but instead I got the whole polygon extent. I just found this problem after I extracted a lot rasters:( Is there any way/tool to delete/remove nodata or to get the extent right?

The first picture is what I got after right click on the layer => zoom to layer, the second picture is what I expect to get after zoom to layer, the third picture shows that the extra extent of extracted raster are all identified as nodata. Please help me delete these no data, thanks!

The extent I got

The extent I expected

As you can see, the extra extent identify as nodata

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