Hi Even/Frank,
An hour or two back I did take a look at Frank's idea, and noted the "no
skipped cells" and other limitations :-(
I'll go through the xyz driver docs on Wednesday because I'm out all day
tomorrow - right now I'm trying to tie up some loose ends before going
home ... (it's 10:30 pm here).
Thanks for the interest and help.
Kind regards,
Zoltan
On 2011/07/18 22:26, Even Rouault wrote:
Le lundi 18 juillet 2011 18:01:08, Frank Warmerdam a écrit :
Zoltan,
I haven't used it myself, but it looks like the XYZ driver might be
ready made for your need:
http://www.gdal.org/frmt_xyz.html
It looks like it is new in 1.8.
The XYZ driver doesn't fit Zoltan's requirements because it relies on the fact
that coordinates are sorted and regularly spaced.
So gdal_grid is the only option. With the help of a spread-sheet application
or by any other adequate means, you should be able to transform your file into
a CSV file and create a OGR VRT file that will be recognized as a valid OGR
point datasource usable by gdal_grid. See the doc of the 2 drivers :
http://gdal.org/ogr/drv_csv.html
http://gdal.org/ogr/drv_vrt.html
Best regards,
On Mon, Jul 18, 2011 at 7:04 AM, Zoltan Szecsei<[email protected]>
wrote:
Hi,
I have an ASCII file of DEM points that need to be converted into AAIG
format, so I'm hoping gdal (_translate?) will do the trick
I do not want to rely on the fact that my DEM is column/row ordered, nor
that it is "exactly" 2m spaced.
Is there some free-format ASCII that gdal can read, or does anyone know
which of the formats read by GDAL won't need to be "ordered" or "exact".
I'm hoping GDAL will take the pain out of ordering my DEM, and creating
NODATA for missing cell values.
My file looks like this: (Easting, Northing, height, type)
570433.84 201262.28 73.65 MPoint
570433.84 201260.28 73.72 MPoint
570433.84 201258.28 73.79 MPoint
570433.84 201256.28 73.86 MPoint
570433.84 201254.28 73.89 MPoint
570433.84 201252.28 74.02 MPoint
570433.84 201250.28 74.16 MPoint
Thanks in advance,
Zoltan
--
===========================================
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
P.O. Box 7, Muizenberg 7950, South Africa.
65 Main Road, Muizenberg 7945
Western Cape, South Africa.
34° 6'16.35"S 18°28'5.62"E
Tel: +27-21-7884897 Mobile: +27-83-6004028
Fax: +27-86-6115323 www.geograph.co.za
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--
===========================================
Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
P.O. Box 7, Muizenberg 7950, South Africa.
65 Main Road, Muizenberg 7945
Western Cape, South Africa.
34° 6'16.35"S 18°28'5.62"E
Tel: +27-21-7884897 Mobile: +27-83-6004028
Fax: +27-86-6115323 www.geograph.co.za
===========================================
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gdal-dev mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/gdal-dev
