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Defining projection to geotiff in GIS

In Arcmap 10 catalogue, I first imported the tiff into a geodatabase then right clicked the file and opened Properties, scrolled down to Spatial Reference, which is undefined, and edited to select the GCS WGS 1984 projection. However, when I then  add this file as a layer it does not appear -- only the legend appears in table of contents (with 3 color bands). What is wrong? I am adding the layer to data frame window that already has a Nad 83 tiff layer that shows up fine. I understand Arcmap is supposed to internally adjust the projection so that it shows up with the Nad 83. Is my tiff not really a geotiff? Is there an easy way to find that out?

Peter Bahls

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If you are downloading the GeoTiff from Maps Made Easy it is an EPSG:4326 raster. 

Beyond that, we can't really help much with Arcmap other than to say that we know a lot of our users use it successfully.

Zane
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I can't find EPSG:4326 projection in Arcmap, although I assume from what is posted, that it is the same as the WGS 1984 projection I have been using. Is that correct?

Peter Bahls 0 votes
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We use QGIS and the outputs work fine with that. We know users use Arcmap with our outputs but we can't provide support for another company's software. 

Zane 0 votes
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