Alexander,
You can use the GDALGetGeoTransform() or GDALDataset::GetGeoTransform() to
get the affine transformation coefficients which can be used to calculate
lat/long to col/row and vice versa. You can see the utility script
gdal_merge.py for an example.
On Wed, Mar 24, 2010 at 11:57 AM, Alexan
Christoph Dohmen gmx.de> writes:
> Thanks to Ralf and Frederik!
>
> But now I want to group those data together.
> Well, I want to create a shapefile containing all road-objects.
> This is quite easy using ogr2ogr select everything with a value
> for highway-attribute. Doing the same for rivers
Hi all,
the pixel resolution within a world file must be set up. The world file is
defined below:
Line 1: pixel resolution in the x-direction * cos (rotation)
Line 2: - pixel resolution * sin (rotation)
Line 3: - pixel resolution * sin (rotation)
Line 4: - pixel resolution size in the y-direct
Hi
On 24 March 2010 06:27, Alexander Bruy wrote:
> I have a georeferenced raster and coordinates of some point (lat, lon)
> inside raster. Is it possible
> to convert this lat/lon coordinates to raster coordinates (column and row)?
>
Use the geotransform (you may need to reproject your lat/lon
Hi Chaitanya.
The link is broken: http://trac.osgeo.org/gdal/wiki/MaintenanceReportsByChaitany
Regards,
Ivan
> ---Original Message---
> From: Chaitanya kumar CH
> To: Frank Warmerdam , gdal dev
>
> Subject: [gdal-dev] Maintenance report for Feb 24, 2010 to Mar 23, 2010
> Sent:
Oops!
It's http://trac.osgeo.org/gdal/wiki/MaintenanceReportsByChaitanya
Although, trac.osgeo.org seems to be down now.
On Wed, Mar 24, 2010 at 6:50 PM, Ivan Lucena wrote:
> Hi Chaitanya.
>
> The link is broken:
> http://trac.osgeo.org/gdal/wiki/MaintenanceReportsByChaitany
>
> Regards,
>
> Iva
Hi,
The documentation of OGRwkbGeometryType mentions the following:
wkbPoint25D 2.5D extension as per 99-402
wkbLineString25D2.5D extension as per 99-402
wkbPolygon25D 2.5D extension as per 99-402
wkbMultiPoint25D2.5D extension as per 99-402
wkbMultiLineString25D 2
Parts of this message have been posted in DebianGIS today. Sorry for the
cross-post.
I would strongly encourage the inclusion of netcdf-4 inside GDAL. Not merely
for HDF5, but also for OpenDAP.
I just recently discovered that OpenDAP libraries are now being included
built-in in the new netcdf4 :
Stefan Moebius wrote:
Hi,
The documentation of OGRwkbGeometryType mentions the following:
wkbPoint25D 2.5D extension as per 99-402
wkbLineString25D 2.5D extension as per 99-402
wkbPolygon25D 2.5D extension as per 99-402
wkbMultiPoint25D 2.5D extension as per 99-402
wkbMulti
No good reason. I'm more familiar with the other commands since I use
them often is the main reason. A side benefit is that I can match
existing tiles on other datasets and adopt existing tile names too. Now
that I've read the utility pages for gdal_merge and gdal_retile I see
that would be an ea
Thanks a lot.
Frank Warmerdam wrote:
Stefan Moebius wrote:
Hi,
The documentation of OGRwkbGeometryType mentions the following:
wkbPoint25D 2.5D extension as per 99-402
wkbLineString25D 2.5D extension as per 99-402
wkbPolygon25D 2.5D extension as per 99-402
wkbMultiPoint25D
Hello GDAL Devs,
I encoutered a small problem, where I don't understand why field names in
ESRI Shape files created by gdal, are truncated.
Here is a code snippet:
field_LUC = ogr.FieldDefn()
field_LUC.SetName('LAND USE CODE')
field_LUC.SetType(ogr.OFTInteger)
field_LUC.SetWidth(1
Oz,
shapefiles use the dBase IV format .dbf file for attributes: this defines the
maximum field name width to be 10 characters - 'LAND USE CODE' has 13. Also,
space characters are not permitted - use underscore '_' instead. Whilst GDAL
may create the field names as you have specified, othe
Oz,
The specification that Peter refers to is
http://www.esri.com/library/whitepapers/pdfs/shapefile.pdf. Also, check out the
OGR Shapefile driver's documentation
http://www.gdal.org/ogr/drv_shapefile.html. It documents this issue, as well as
others that might be of interest. Finally, if you a
Hi Guys,
Thanks for everyone for the answers.
I'm sorry about the haste in sending the email. I've should have read more
carefully.
This issue is even in WIKIPEDIA ...
Oz.
On Wed, Mar 24, 2010 at 4:47 PM, Jason Roberts wrote:
> Oz,
>
> The specification that Peter refers to is
> http://www.esri.
Hello List,
I hope you will be able to help me. I'm stuck on a problem.
I'm trying to reconstruct within my Python script polygons from a shapefile
that belong together.
So I naturally perfomed:
geom_tmp = ogr.CreateGeometryFromWkb(ftr.GetGeometryRef().ExportToWkb())
geom.AddGeometryDirectly(geo
ESRI Shapefiles use the ancient DBF format for attribute data. DBFs
restricts the length of field names. When I have to work with Shapefiles, I
try to stick to 8-character field names and avoid spaces and special
characters.
-Eric
-=--=---===---=--=-=--=---==---=--=-=-
Eric B. Wolf
Hello Frank and List,
We waited for the release of GDAL 1.7.0 to see if we could output MapInfo
Fiels (.tab or .mif/mid) with SRS information.
We still can not output .tab or .mif/mid files with SRS information.
Could you please check the test code below to see what's missing or wrong?
Thanks i
Hey guys. I posted a few days ago about a problem with using ogrinfo to
read ODBC from a MS SQL server.
$ ogrinfo test.ovf
ERROR 1: No column definitions found for table
'�o��y.����y', layer not usable.
(... and so on, more binary table names ...)
I can connect to the ODBC/MSSQL
scizmeli wrote:
I would strongly encourage the inclusion of netcdf-4 inside GDAL. Not merely
for HDF5, but also for OpenDAP.
+1
I just recently discovered that OpenDAP libraries are now being included
built-in in the new netcdf4 : http://www.unidata.ucar.edu/software/netcdf/.
yes, but it's
Tamas Szekeres wrote:
>
> If you could do a test with the binaries provided at
> http://vbkto.dyndns.org/sdk/ that would be helpful. It seems the python
> auto-tests are working well with these packages on a Win2003 Server x64
> platform.
>
I have downloaded a release from there. It looks a b
Alex Hagen-Zanker a écrit :
Just to remind you: I reported a similar problem when 1.7 just came out.
Maybe it helps in identifying the problem.
http://www.mail-archive.com/gdal-dev@lists.osgeo.org/msg05605.html
Hi Alex,
There is probably something wrong in your installation. Check the paths
Gregor at HostGIS wrote:
Hey guys. I posted a few days ago about a problem with using ogrinfo to
read ODBC from a MS SQL server.
$ ogrinfo test.ovf
ERROR 1: No column definitions found for table
'�o��y.����y', layer not usable.
(... and so on, more binary table names ...)
I can
Reinaldo Escada Chohfi wrote:
Hello Frank and List,
We waited for the release of GDAL 1.7.0 to see if we could output MapInfo
Fiels (.tab or .mif/mid) with SRS information.
We still can not output .tab or .mif/mid files with SRS information.
Could you please check the test code below to see wh
Frank Warmerdam wrote:
> Debuging MS SQL related bugs isn't really all that convenient for me
Ha ha! I myself rank any dealing with MS SQL on par with cleaning the
Augean Stables. I understand. :)
You could add some debug statements in the
gdal/port/cpl_odbc.cpp code in an attempt to determi
danotchki wrote:
Hello List,
I hope you will be able to help me. I'm stuck on a problem.
I'm trying to reconstruct within my Python script polygons from a
shapefile that belong together.
So I naturally perfomed:
geom_tmp = ogr.CreateGeometryFromWkb(ftr.GetGeometryRef().ExportToWkb())
geom.Ad
Frank,
It worked now.
Thanks a lot.
Regards,
Reinaldo
> Reinaldo Escada Chohfi wrote:
>> Hello Frank and List,
>>
>> We waited for the release of GDAL 1.7.0 to see if we could output
>> MapInfo
>> Fiels (.tab or .mif/mid) with SRS information.
>>
>> We still can not output .tab or .mif/mid fil
Chris wrote:
>> By the way,
>>GDAL/netcdf-4 seems to be my only was of being able to access OpenDAP data
>>from inside R.
>Which is why you should use Python (and Rpy) ;-)
I didn't know Python was widely used for OpenDAP - is that via GDAL or
native? Can you point to examples of its use and se
The following module might help, use the mapToPixel() function.
#---Imports
try:
from osgeo import gdal
except ImportError:
import gdal
def mapToPixel(mx,my,gt):
''' Convert map to pixel coordinates
@param mxInput map x coordinate (double)
@param myInput map
Hey, this is so excellent. I took Frank's advice about just trying to
hack the C++ code... and discovered as a side effect that FreeTDS has a
new release. This new release fixed the issue. Ha!
I do have one outstanding issue, though: it is very, very, very, very
slow because it scans every tab
Gregor at HostGIS wrote:
Hey, this is so excellent. I took Frank's advice about just trying to
hack the C++ code... and discovered as a side effect that FreeTDS has a
new release. This new release fixed the issue. Ha!
I do have one outstanding issue, though: it is very, very, very, very
slow
From the docs:
Hey, how'd you know about that fix I found? Oh right, you invented it. :)
Thanks a million, Frank -- you're worth twice your weight in gold. Even
just telling me to go hack it myself, actually got the job done, and I
learned a bit about the internals of OGR+ODBC.
--
HostGIS,
Thanks! That what I need
2010/3/25 Pinner, Luke :
> The following module might help, use the mapToPixel() function.
>
> #---Imports
> try:
> from osgeo import gdal
> except ImportError:
> import gdal
>
> def mapToPixel(mx,my,gt):
> ''' Convert map to pixel coordinates
> �...@param
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