[Gdal-dev] Error reading ArcInfo Grid

Matthew Perry perrygeo at gmail.com
Wed Sep 27 19:09:02 EDT 2006


Hey folks,

 Trying to import an ArcInfo Grid into grass and I'm getting a bunch
of the following errors:

ERROR 1: IReadBlock failed at X offset 0, Y offset 5399
ERROR 1: GetBlockRef failed at X block offset 0, Y block offset 5399

Strangely enough, the import proceeds but I get some wierd results!
(see attached image)

I experience the same errors using other gdal utilities as well. I've
found a few other mentions of this issue but no solutions yet..
http://permalink.gmane.org/gmane.comp.gis.gdal.devel/1643

So far the only thing able to open the grid properly is ArcGIS. So I'm
guessing that this grid has some strange issues that the gdal driver
doesn't handle. If anyone's interested in helping debug this, i've
posted the grid at
http://ebm.nceas.ucsb.edu/mapping/data/rasters_bad.zip

Thanks,
-- 
-------------------------------------------------------
Matthew T. Perry
GIS Analyst / Software Engineer
National Center for Ecological Analysis and Synthesis (NCEAS)
http://ebm.nceas.ucsb.edu/
http://www.nceas.ucsb.edu/ecoinformatics
work: perry at nceas.ucsb.edu
personal: perrygeo at gmail.com
web: http://www.perrygeo.net
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