On Fri, Feb 26, 2010 at 2:51 PM, Ricardo Cezar Bonfim Rodrigues
rikardoce...@msn.com wrote:
Hi,
I'm using Gdal to load dted files and get max elevations of a region, but I
have constraints concerning speed. Inspite of loading geotifs generated from
dted has reduced a lot the processing
Hi Jorge,
I've implemented a customized gdal reader using the method readBlock instead of
using RasterIO and now it seems to be much faster and will propably be adequate
to my problem.
But thanks by the tips, I'll keep it in mind if I need it.
Ricardo Rodrigues
Brazil
From:
I am simply trying to open a raster image, manipulate in NumPy and then spit
it back out in GDAL.
I am having trouble setting null data...
I tried: ds.GetRasterBand(1).SetNoDataValue( - )
but nothing seems to work.
Any help is appreciated!
Below is my code:
#! /usr/bin/env python
Discourse Maps wrote:
I am simply trying to open a raster image, manipulate in NumPy and then spit
it back out in GDAL.
I am having trouble setting null data...
I tried: ds.GetRasterBand(1).SetNoDataValue( - )
but nothing seems to work.
...
Dear Discourse Maps,
Presumably you should be
I'm writing some code that involves buffering a feature in a point layer and
then doing a spatial filter with another set of layers. I've got everything
working just fine but I'm having a hard time determining how the spatial filter
works. Based on the documentation, it looks like all
Spencer Gardner wrote:
I'm writing some code that involves buffering a feature in a point layer and
then doing a spatial filter with another set of layers. I've got everything
working just fine but I'm having a hard time determining how the spatial
filter works. Based on the documentation, it
Hello,
I am having problems re-projecting an ArcAscii Grid from LatLong/WGS84
to Lambert Conformal. The source grid was derived from a GRASS mapset.
Using r.out.gdal, a GRASS raster was exported to AAIGrid format using:
r.out.gdal input=MODIS_input_raster format=AAIGrid type=UInt16
Hello,
I'm trying to put georeference information to a raster HDF file which
doesn't containt projection nor geo-transformation or any GCP.
HDF is not georeferenced, but contain lot of useful metadata, so I manage to
get the projection, which is Geostationnary projection ( +proj=geos).
However,
I'm new to GDAL and am usingthe python bindings. I want to transform a newly
created shapefile from WGS84 to a Lambert Conical Conformal so that I can
calculate the length of the contained polylines. The script exits with no
errors but when I look at the shapefile in arcCatalog I see that the
Not much of a response going on here. In order to change the shapefile
projection from geographic to projected do I need to reopen the file,
get each feature, and transform the points individually? If so what
calls do I need to invoke?
On Mar 1, 12:54 pm, Jamie Lahowetz deadpic...@gmail.com
Jamie, Try transforming the line geometry before adding it to the feature.
That should do it.
chris
On Mon, Mar 1, 2010 at 4:24 PM, deadpickle deadpic...@gmail.com wrote:
Not much of a response going on here. In order to change the shapefile
projection from geographic to projected do I need
Thanks for the response. I'm sorry I'm really new to this and am not sure
where to transform the line geometry, I know it should be before
layer.CreateFeature(feature) but after I add the points to the geometry. Is
it before or after feature.SetGeometry(line)? And is the right way to call
the
Please? Anyone? I'm sure the response will be really quick...
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___
scottd777 wrote:
Hi, and thank heaven for GDAL!
I was so happy to find this tool, but I am having some trouble figuring out
the exact command I need for an image warping application. If there is
someone who doesn't mind a newbie type question, I could really use the
help!
Essentially, I
deadpickle wrote:
Not much of a response going on here. In order to change the shapefile
projection from geographic to projected do I need to reopen the file,
get each feature, and transform the points individually? If so what
calls do I need to invoke?
On Mar 1, 12:54 pm, Jamie Lahowetz
I figured it out... with all of your help. I had the coordtrans =
osr.CoordinateTransformation switched. I wanted to input lat/lon (WGS84) and
transform it to lcc (source) and I also had to set the source prj to lcc. I
think you all said this stuff already, just took me a little while. Thanks
for
On Mon, Mar 1, 2010 at 7:12 PM, Bill Hudspeth w...@unm.edu wrote:
...
When I try to re-project the exported AAIGrid to another projection, I
use:
gdalwarp -s_srs EPSG:4326 -t_srs '+proj=lcc +lat__1=33n +lat_2=45n
+lon_0=97w' MODIS_output_latlong.asc MODIS_output_lambert.asc
Note that without
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