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ArcGIS Desktop 10.2 - How to create a tfw file?

Question asked by Vincenty on Mar 11, 2015
Latest reply on Mar 13, 2015 by Vincenty

Hi,

 

I have a SRTM30 tile named E140S10.gif attached, containing 600 column and 750 rows. The upper left corner is 140° W, thus +140 and 10°S, thus -10, according to the filename...

 

In a text editor, I tried to create a georeferenced file .gfw (attached):

 

0.066666666
0.000000
0.000000
-0.066666666
140
-10

 

I calculated the 0.06666666 by dividing 40° (width of the tile) / 600 pixels = 0.0666666666

and 50° (height of the tile) / 750 pixels = 0.0666666666

 

The gfw seems correct and has the same name as the .gif file, located in the same directory, but do not open in ArcMap. I get an error "missing spatial reference...".

 

I don't understand why?

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