[GIS] Create world file from kml

georeferencingkmlraster

I have a KML file for a NASA image. I want to create a world file from it so I can use the image in say QGIS. Is it possible to extract the key info (bounding coordinates) from the KML? It seems to be made up of lots of links to smaller tiles of the image

There is already another post on here (I can't post any more links, but search for "export-georeferenced-image-overlay-from-kml" which points to WorldFileTool and a KMZ to worldfile converter

The first (WorldFileTool) seems to never link to the all important zip file

The second throws an error when I run it.

Hence I am a bit stumped. I can georeference it by hand if needs be, but I had hoped the KML might give me the easy answer.

Any suggestions would be great.

Best Answer

I recently found this link (and a printer friendly version) to the WorldFileTool which you may want to try.

I just tried and it works, but for kml files it only converts one overlay. If you import a superoverlay, it only works for the smallest scale (lowest resolution) tile.

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Look at MapsForge - I have implemented an extension to the overlays that displays georeferenced images (sadly it was for a client and I can't release the code but it was pretty easy).

[GIS] Convert a KML ImageOverlay to World Files with GDAL

I made a version of WorldFileTool (which I'll call 0.3.8 because the project seems dead) that supports CLI input and can be included as part of a GDAL script:

Command line argument:

 java -jar WorldFileTool.jar image-overlay-file.kml
     Will write out pgw/tgw/jgw world file to the same folder
     Without arguments, the GUI is loaded.

It writes out a pgw/tgw/jgw file in the same folder as the kml, with the same name as the image file.

I evaluated a few shell scripts that claim to do the same task but this tool was the only one that started to feel at least slightly robust. I'd like to convert from subversion repository to github to release the source.

On Ubuntu 13.10, I built it with:

sudo apt-get install junit
export CLASSPATH=.:/usr/share/java/junit4.jar
ant

Best Answer

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