AnsweredAssumed Answered

Raster calculator won't add layers properly

Question asked by psiri555 on Jul 25, 2014
Latest reply on Jul 28, 2014 by psiri555

Hi there,

 

I'm having some difficulty adding raster layers. I'm trying to create a species richness map and I was thinking of layering them via the calculator. The files I have are individual species distributions (which are just patches of 1 grids), and I have a main raster of the map of the location (which are patches of 0 grids). Now, when I add the layers on raster calculator (irrespective of order), I end up with just the patches of 1 and the larger map just disappears. This would still happen if the values were 1 and 2 respectively, the grid cells for the main map would just disappear anyway.

 

What I want is to still have those grids with the value 0 so it would be uniform for all the species so I would be able to overlay all of them at once and get a map of the richness. The size of the cells are the same, and they are under the same projection. I just dont know what might be the reason.

 

Does anyone know why this happens/what I can do about it?

Any help would be greatly appreciated. Thank you.

 

Siri

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