Thank you Chaitanya
It worked.
I had tried spat. But it couldn't achive.
Could you tell me why spat can not be used to part shp file
because of its big size ?
regards
2012/2/18 Chaitanya kumar CH chaitanya...@gmail.com:
Ahmet,
If you want to divide the shapefile to reduce file size or the
Hi
I have managed to create a hillshade using gdaldem and I have my original
topographic rasters. However I do not want the standard grey hillshad or
apply a colour ramp.
Is there a way to combine the hillshade and topo map together - ie add a
transparency or opacity to the hillshade.
I have
Hi,
the standard procedure for creating topo-maps is to overlay your land
coverage map with a semi-transparent hillshading. I don't know if
there's a tool for combining/adding two raster maps together in gdal,
but this is a rather standard procedure in any GIS. In QGIS, for
example, you can
The workflow with QGIS described by Frank is also working with SAGA GIS.
SAGA also allows you to export a permament combination as image file
(tif, jpg, png ... including world file and kml) with the 'Export Image'
module.
Volker
On 02/21/2012 02:14 PM, Frank Broniewski wrote:
Hi,
the
Hey,
TJMartin wrote
...
Is there a way to combine the hillshade and topo map together - ie add a
transparency or opacity to the hillshade.
...
A common way is to convert your (i assume) RGB topo map to HSV color space
and replace the intensity band (v) with your hillshade. This is for
On 21-02-2012 14:11, Rutger wrote:
Hey,
TJMartin wrote
...
Is there a way to combine the hillshade and topo map together - ie add a
transparency or opacity to the hillshade.
...
A common way is to convert your (i assume) RGB topo map to HSV color space
and replace the intensity band (v)
On 12-02-21 12:29 AM, ahmet temiz wrote:
Thank you Chaitanya
It worked.
I had tried spat. But it couldn't achive.
Could you tell me why spat can not be used to part shp file
because of its big size ?
Ahmet,
Roughly speaking -spat could be used for this purpose, but any features
crossing the
Thanks for the improvements Frank - no problems here with trunk.
-jeff
--
Jeff McKenna
MapServer Consulting and Training Services
http://www.gatewaygeomatics.com/
On 12-02-20 8:39 PM, Frank Warmerdam wrote:
Folks,
If you don't build on Windows using visual studio NMAKE files you can
Hi Everyone
Many thanks for your help.
Lots of recommendations and I have tried each one with limited success
1) QGIS - works but i need a permanent copy.
2) GIMP - problem with this is GIMP does not recognise my rasters. I have
expanded to color table to rgb and it still wouldnt open the file.
Hello,
I would like to help add write support and more to the Postgis Raster
driver. Currently, there is a loader script in the autotest/data directory
for the driver -- when write support is complete, will that script no
longer be necessary? I don't see any corresponding test loading scripts
On Tue, Feb 21, 2012 at 10:38 AM, David Zwarg dzwarg+g...@azavea.com wrote:
Hello,
I would like to help add write support and more to the Postgis Raster
driver. Currently, there is a loader script in the autotest/data directory
for the driver -- when write support is complete, will that
5) Looked at GMT and I cannot find the options to load two rasters on
top of each other.
Tim,
You don't load the two grids on top of one-another. Illumination is NOT
like transparency. It uses the gradients of the grid, projects it into
the direction of light and than change the color in
Hello All,
I am very pleased to find this forum. This is my first post. Please bear
with me. In my project, I am trying to read in .bil file (hyperspectral
image) into my C/C++ code. ( I haven't done this yet, because I am still
trying to see, how can I do it).
After I read in, I run some
Have you reviewed the article from Tim Sutton: A workflow for creating
beautiful relief shaded dems using GDAL[1]?
It has some valuable pointers.
[1]
http://linfiniti.com/2010/12/a-workflow-for-creating-beautiful-relief-shaded-dems-using-gdal/
Donovan
On Tue, Feb 21, 2012 at 12:29 PM,
Joseph,
I'd start with http://www.gdal.org/gdal_tutorial.html, the general purpose
API tutorial. It isn't comprehensive, but I think it is fairly good for the
areas covered.
Note that GDAL does not directly help with distributed processing. I
assume this is what you mean by running on a
Hi all
I have a question regarding the gdaladdo tool and NODATA pixels:
When using resampling like average it seems that along the border of
DATA and NODATA pixels there happens an averaging also of some of the
original NODATA pixels (looks like 1-2 pixel width). This way in the
overviews
Armin,
Reviewing the overview building code in gdal/gcore/overview.cpp
it clearly tries to exclude nodata values from the averaging calculation.
What does the gdalinfo report look like for the file before you run
gdaladdo?
Best regards,
On Tue, Feb 21, 2012 at 12:36 PM, Armin Burger
Gianluca,
Or if just there is a way to create a vector file showing the boundary of
the rectified image.
What I am searching is a script in gdal style in order to automate the
procedure for several rasters without further user input.
OGR has tindex which makes a shapefile outline of
Frank
the original images showed
...
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=PIXEL
...
Band 1 Block=3000x1 Type=Byte, ColorInterp=Red
Band 2 Block=3000x1 Type=Byte, ColorInterp=Green
Band 3 Block=3000x1 Type=Byte, ColorInterp=Blue
Then I tried to set the NODATA
On Tue, Feb 21, 2012 at 1:17 PM, Armin Burger armin.bur...@gmx.net wrote:
Then I tried to set the NODATA value to 0 using Gdal-Python, and afterwards
they had
Band 1 Block=3000x1 Type=Byte, ColorInterp=Red
NoData Value=0
Band 2 Block=3000x1 Type=Byte, ColorInterp=Green
NoData Value=0
Hi Frank,
Yes, I am modernizing some of the testing scripts for PostGISRaster, and
adding write support in the near future. I've been in touch with and am
coordinating with Jorge.
I think it was just the test script that used the old name, btw. The driver
is truly called PostGISRaster, just the
List,
I am attempting to reproject 8 gtiffs, each in a local equirectangular
projection, back to gcs for use in geoserver. I immediately went to
gdalwarp to perform this task and am having an issue. The input files are
stored in positive longitude, while the output SRS is in negative
longitude.
Hello GDAL guru's,
I am working on a python script where I read in two rasters of similar
extent and resolution.Then I re-assign any values that are greater that
zero to a 1.Next, I compare to the rasters and attempt to create a third
resulting raster which has 1's everywhere that the two
Greetings GDAL devs,
I am interested in developing a GDAL driver that calls out to a Java
library that accesses a database that we are developing using SWIG's
Java Bindings. Are there any examples of existing GDAL drivers using
the SWIG bindings? If not, how might I use the SWIG library
Derek,
Can you explain the following lines towards the bottom of the script?
data1[data10]=1
...
data2[data20]=1
On Wed, Feb 22, 2012 at 8:46 AM, jdmorgan jdmor...@unca.edu wrote:
Hello GDAL guru’s,
I am working on a python script where I read in two rasters of similar
extent and
Hi
This seems to be an old problem (see
http://www.osgeo.org/pipermail/gdal-dev/2009-October/022308.html) but when I
try to compile GDAL 1.9.0 from source using Obuntu 10.04 through Parallels
Desktop 6.0.12106 on OS X 10.6.8 (don't ask why this convoluted approach - long
ESRI related story)
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