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The USDA Forest Service distributes GIS data as Esri Geodatabase extensible markup language (XML) files. I downloaded one in the hopes that I would be able to convert it to something less esoteric using OGR. However:

$ ogrinfo ~/Downloads/S_USA.National_Trails.xml
FAILURE:
Unable to open datasource `/Users/martijnv/Downloads/S_USA.National_Trails.xml' with the following drivers.

Unfortunately, neither the FileGDB driver nor the OpenFileGDB driver's pages explicitly mention this XML format. It seems to be defined here on ESRI's website.

Any way to read / convert this with FOSS4G tools?

  • I don't think so, can't see that format in the ogr format list. Perhaps ask on the gdal-dev mailing list. – user2856 Jul 22 '14 at 12:12
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    It's weird because it's supposedly 'Esri's open mechanism for information interchange between geodatabases and other external systems' (reference).. You'd think they would supply a GDAL driver to back that claim up. – mvexel Jul 22 '14 at 17:16
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    @mvexel. :) xkcd.com/927 – elrobis Jul 23 '14 at 17:25
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As @Luke mention in his comment:

I don't think so, can't see that format in the ogr format list.

If you're looking for a FOSS tool to help you convert this data, you should probable look at something like HALE or GeoKettle

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