I have 10 raster images (.tif format) with no spatial reference system (SRS). Is it possible to mosaic them by taking into account that they do not have a SRS?

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    Please DO NOT use ALL CAPS in your titles. google.com/search?q=arcgis+mosaic+tiff suggests that you will be able to do this. What have you tried? – PolyGeo Nov 29 '17 at 10:34
  • I have tried the "Create Raster Dataset" from the Data Management tools. But the images are not matched correctly. I think this is because there is a missing projection in my original images. – NikosGr Nov 29 '17 at 11:00
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    Please use the edit button beneath your question to revise it with any requested clarifications. – PolyGeo Nov 29 '17 at 11:02
  • Mosaicking doesn't operate in a vacuum. If the images are not georefereced and in the same coordinate system, you still have some prep work to do. – Vince Nov 29 '17 at 11:20
  • What do you mean prep work? Maybe you can recommend any program which can create a mosaic by matching same point of 2 images? – NikosGr Nov 29 '17 at 11:23

First of all you must make sure all 10 images are referenced one by one the most accurate way. After that you should visually check if it's all right. If it seems fine just then you should Mosaic Raster. I suppose you might get errors if accidentally one ore more blank spots are created after georeferencing.

P. S. Maybe it is worth to have separate 10 images. And work with them as a group of elements in the Table Of Contents. In that case they are slightly smaller (by size, not dimensions). Zooming & panning works faster as well.


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