The -r cubic option seems to be working like a charm. Thanks a lot for your
suggestion, Brian.
However, I am still not quite sure why this tiling effect occurred when
using the default resampling method (i.e. nearest neighbour ) on this map
data. And how can we tell what kind of resampling method
I am still stuck. Any more ideas? Thanks.
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Tried the "-et 0.0" option with no luck :(
Any other idea about how to get rid of this tiling effect?
Thanks,
Chris
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http://osgeo-org.1803224.n2.nabble.com/file/n6749062/gdalwarp_chunk_problem.doc
gdalwarp_chunk_problem.doc
The attached file did not seem to be uploaded, so here it is.
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Hi,
I have used the (OSGeo4W) GDALWARP command to warp some height data image
files (NTv2 transformation). When displaying one warped height data in our
own application, there appear to be visible tiles on the image and some
misalignments exist between those square tiles (chunks).
After warping,
Thanks, Ralf.
I am using the latest version of FW Tools 2.4.7. I am guessing I have to
download the GDAL version 1.8 and build the dll/exe to replace the current
ones under the FW Tools bin folder?
And I will try your suggestion about the -t_srs option.
BR,
Heng
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Hi Uwe,
Sorry to bother you again. I actually need your help about another GDALWARP
problem I am having. I just thought it might be better to send you an email
directly about this (a shortcut:)) although I did just post a message regarding
this problem on the GDAL DEV forum:
http://osgeo-org.
Hi there,
When I tried to use GDALWARP to do the re-projeciton on some large GeoTiff
data, the output pictures seemed to contain the gaps, which appeared to be a
few horizontal lines when zooming out. The command I was using is something
like this:
gdalwarp --config GDAL_CACHEMAX 250 -wm 250 -co
Thanks for your quick response, Uwe. Yes, all the tif files have got the same
color table. I checked that and added the -pct option. But I think I forgot to
remove the old merged one I generated without the -pct option. Now that I have
removed the old merged one, a merged colored tif file is su
Hi Uwe,
I have been trying to use gdal_merge.py to merge a few 8 bit colored .tif tiles
together. Having tried all sorts of options for this command, I always ended up
with a merged 8-bit grayscale picture. I did a search on the internet and found
a couple of posts related to this, however it
Brilliant. Thanks a lot, Uwe. This is all I want to know.
Yes, you are right that I only recently started working on these data again
although I have only got one day off for Christmas (in China) :)
From: Schmitz, Uwe [via OSGeo.org]
[mailto:ml-node+5931200-375580391-308...@n2.nabble.com]
Sent
to
worry about it?
Thanks & BR,
Heng
From: Uwe Schmitz [via OSGeo.org]
[mailto:ml-node+5862681-1425697383-308...@n2.nabble.com]
Sent: 23 December 2010 19:47
To: Heng Feng
Subject: RE: [gdal-dev] An issue about using GDALWARP to do
theNTv2transformation
Heng,
heng.feng wrote:
Hi Uwe,
T
] An issue about using GDALWARP to do
theNTv2transformation
Heng,
heng.feng wrote:
Hi Uwe,
Thanks for your reply. The l0.tif file does not contain any georeferenced
information. However, I have run the GDALINFO command on another raster data
file which is in the same map data set provided by
http://osgeo-org.1803224.n2.nabble.com/file/n5861680/gdalwarp_problem1.doc
gdalwarp_problem1.doc
Hi Uwe,
Further to my email sent to you yesterday, I have uploaded the screenshots
showing the results by running the GDALINFO and GDALWARP commands on the
same raster file, which contains the geore
Hi Uwe,
Thanks for your reply. The l0.tif file does not contain any georeferenced
information. However, I have run the GDALINFO command on another raster data
file which is in the same map data set provided by the customer and hence is
supposed to be georeferenced in the way as the l0.tif file
http://osgeo-org.1803224.n2.nabble.com/file/n5848200/gdalwarp_problem1.doc
gdalwarp_problem1.doc
Hi Uwe,
I have tried your suggestion on the same raster file with a modified
"+x_0=50" parameter in the command line (as seen in the attached doc). I
could see the major difference:there is still
Brilliant. Thanks, Uwe. I will try that and let you if it works.
From: Schmitz, Uwe [via OSGeo.org]
[mailto:ml-node+5841399-2004682561-308...@n2.nabble.com]
Sent: 16 December 2010 09:44
To: Heng Feng
Subject: AW: [gdal-dev] An issue about using GDALWARP to do the
NTv2transformation
Heng,
as F
Thanks a lot, Frank. Your explanations really make sense to me. We have got
the raster data and the link for the grid shift file from one of our
customers. I think I need to check with the customer to find out what is the
possible reason. Will let you know if I have got any further question about
http://osgeo-org.1803224.n2.nabble.com/file/n5838904/gdalwarp_problem.doc
gdalwarp_problem.doc
Hi there,
I was trying to use GDALWARP command to do the NTv2 transformation on some
German map data (raster data). However I have come across a lot of errors
saying "failed to find a grid table for t
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