convert arcgis grid to geotiff
Naresh Pai
Thanks,
Naresh
us
> Is there a way to convert ArcGIS grid files (.aux) to geotiff to be read by geotiffread function ?
>
> Thanks,
> Naresh
can you show the anatomy of an arcgis grid file(?)...
us
Naresh Pai
For a file named XYZ, the grid file as the following files:
XYZ.aux
XYZ.rrd
The .aux (auxilary) files informs ArcGIS about the header, coordinate system (units and projection), etc. The .rrd (reduced resolution dataset) file has all the data. ArcGIS has a feature to convert this to a tif file. However, I would like to do this in Matlab itself.
Thank you.
Naresh
Wolfgang Schwanghart
as far as I know, there is no such function. I don't have the mapping toolbox and from the documentation I know, that there is no geotiffwrite function. One thing you might want to try, is to automatically write an ASCII world file (tfw.file) ( http://webhelp.esri.com/arcgisdesktop/9.3/index.cfm?id=3046&pid=3034&topicname=World_files_for_raster_datasets ) together with a "normal" tif-file with the same filename. This won't be a real geotiff, but the combination contains a spatial information and you will be able to open it in every GIS environment.
However, when you have data in double format, you will probably have problems writing them from Matlab. Check this here: http://www.mathworks.com/matlabcentral/newsreader/view_thread/240297
HTH, Wolfgang
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Jimmy Shen
http://www.rotman-baycrest.on.ca/~jimmy/geotiffwrite
You can write a 2D or 3D array to a single or multi-band GeoTIFF file, with a GUI to input GeoTIFF parameters.
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