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I'm doing data-analysis on satellite data and my source data is in GeoTiff-file format. What I would like to do with the data is:

1) Open the raster data in ArcMap etc.  
2) Change the coordinate system from WGS84 --> ETRS-TM35FIN 
3) Extract an area from the original data specified by ETRS-TM35FIN coordinates 
4) Save the extracted area as plain .tif-file so that I can do data-analysis on it in Matlab

Can someone give the steps I need to do, in order to achieve my goals? I have no experience in ArcGIS software and the terminology etc. is very new to me, but I don't want to start reading a 500 page book just to get my data into a format so that I can analyze it in Matlab =)

The following picture will summarize my question:

enter image description here

Thank you for any help! =)

UPDATE:

I'm able now to extract specific area from the GeoTiff, but I can't save it as a plain .tiff-file:

enter image description here

  • Do you have access to the Spatial Analyst extension? It will be required for extracting by cooridnates. – Devdatta Tengshe Jun 17 '13 at 7:57
  • Hi @Devdatta Tengshe Yes, I do =) But I don't know how to use it. The whole program is new to me :S – jjepsuomi Jun 17 '13 at 7:58
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    Matlab can also read and write geotiff-files (R2011 and later) – Martin Jun 17 '13 at 8:14
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    @jjepsuomi Yes, I'm afraid that you do need the Mapping toolbox. – Martin Jun 17 '13 at 9:11
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    Also, try using only one "f", like .tif – Martin Jun 17 '13 at 9:12
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I'll suggest that you can do this using Geoprocessing . This will be the way with the least amount of interaction with ArcGIS. This needs to be just a two stage process.

  1. Firstly, you will need to run the Project Raster tool. You can export the raster to ETRS-TM35FIN coordinate system

  2. Then you can extract the required area, by using the Extract by Polygon (Spatial Analyst) tool. in the out raster, if you provide the name with .tif, it will be exported as a Tiff File

  • +1 @Devdatta Tengshe Thank you so much for your help! I will give it a try =) – jjepsuomi Jun 17 '13 at 8:10
  • I have a problem with exporting the file as a plain .tif-file – jjepsuomi Jun 17 '13 at 9:08
  • I will post print screen here. The Extract by Polygon complains that the file format isn't allowed even though I gave it the file extension .tiff – jjepsuomi Jun 17 '13 at 9:09
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    @jjepsuomi: Please try with the extension.tif Single f, not double f – Devdatta Tengshe Jun 17 '13 at 9:13
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    One way I have found out, is that you can add the geotiff to ArcMap, and then export the entire map to Tiff. resources.arcgis.com/en/help/main/10.1/index.html#//… This will ofcourse lead to loss of resolution ( both from 32 bit to 8 bit, as well as less number of pixels) – Devdatta Tengshe Jun 17 '13 at 10:10

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