[GRASS-user] decoding esri file format

[Daniel Victoria]

Hi Stuwart,

What do you mean by connect the metadata to the Tif? Ypu mean get it in the
right projection? Or export the metadata from Arc to some sort of metadata
catalog (geonetwork)?

If you just want to get the correct coordinate system, then your best bet
is to do as Helmut said. Import it with r.in.gdal or use gdal_translate.

Here is a breakdown of what each of those file normally contains in the
ArcGIS world:
xx_v2.txt: This is not a standard arc file when dealing with tiff files.
It's probably something the data provider created
xx.aux - Auxiliary file which contains information about raster statistics,
histogram, etc
xx.rrd - that is the pyramid layer. Used for fast rendering. Don't think
grass will use that
xx.tfwx - I believe this is the tif georeferencing file but normally you
don't have the last x
xx.tif - you actual data
xx.tif.aux.xml - Metadata created using ESRIs tool (ArcCatalog). I've often
seen it using the FGDC metadata standard.


Now, looking at the xml file I see:
-<SpatialReference xsi:type="typens:ProjectedCoordinateSystem">
<WKT>PROJCS["NAD_1983_StatePlane_Ohio_South_FIPS_3402_Feet",GEOGCS["GCS_North_American_1983",DATUM["D_North_American_1983",SPHEROID["GRS_1980",6378137.0,298.257222101]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",1968500.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-82.5],PARAMETER["Standard_Parallel_1",38.73333333333333],PARAMETER["Standard_Parallel_2",40.03333333333333],PARAMETER["Latitude_Of_Origin",38.0],UNIT["Foot_US",0.3048006096012192],AUTHORITY["EPSG",3735]]</WKT>

So it looks as thou your data is in epsg:3735. r.in.gdal with the override
flag in a State Plane location should work

Cheers
Daniel


On Sat, Jan 26, 2013 at 2:10 PM, Stuart Edwards <sedwards2 at cinci.rr.com>wrote:

> Hi -
>
> I have a zip file provided by a US state agency that was 'georeferenced
> within ArcGIS 10' in EPSG 3735.  I have been unable to open it with GDAL
> (other than in a rectangular x,y, region as a tiff) and wonder if anyone
> has figured  out how to connect the esri metadata with the tiff.  When the
> zip file is expanded, it contains the following files:
>
> xx_v2.txt (contains what looks like coordinates of 20 points)
> xx.aux
> xx.rrd
> xx.tfwx (some research suggested removing the 'x', but that doesn't seem
> to help)
> xx.tif
> xx.tif.aux.xml (this contains metadata)
>
> thanks for any assistance ....
>
> Stu
>
>
>
>
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