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Guest player1

how to edit a GeoTiff?

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Sorry if this seems dumb, but I have GeoTiff's that need editing and I really prefer to use GeoTiffs as a way for Resample to get it aligned in FSX especialy if you use multiple sources but when I save them in Photoshop it losses all the Geo data. Ughh! I can export the Geo Data using Glbal Mapper and I know there is a way but I cant find a way to add the Tag info back into the tiff after I ahve saved it.So I don't see how you can make a water mask geotiff as well as a blend mask as wouldn't all of those need to be GeoTiff as well?Thanks for any help.

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Hi there,you don't need to "rebuild" the geotiff because resample.exe will be quite happy with a regular tiff. Instead, use the georeferencing and scale parameters from the tfw file and Photoshop to set up your inf file for resample. Specifically:ulxMap = -158.750278ulyMap = 58.600278nCols = 13672nRows = 6118xDim = 0.000278yDim = 0.000278(obviously, your values will differ).The other option is to re-load your Photoshop tif back into Global Mapper after making a copy of your original tfw file with the same name as the Photoshop file. Global Mapper will ask you about the projection parameters, which should be geographic lat/long and then will load your image, which you can then re-export as geotiff.Cheers, Holger

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Holger,Thanks so much for the help!I used to do a lot of photo scenery design and "retired" after FS9 because of the limit on resolution, but with FSX I am excited again and having "fun"...So hats off to you and everyone on this forum.

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If you store your geotiff and your world file from global mapper, you can re-insert the geotiff tags using a free utility call geotifcp.exe. The below link is not the download page, but it will get you there if you follow some links.You use the syntax, geotifcp -e myfile.tfw myinfile.tif myoutfile.tif"myoutfile.tif" is now a geotif using the info from myfile.tfw.Another freebe in the same family is listgeo, which displays the geotif tags...I use that sometimes to remind myself if I've even got a geotif or not.Best,Bob Bhttp://www.remotesensing.org/geotiff/geotifcp.html

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