All Questions
528
questions
2
votes
1
answer
219
views
gdalwarp to change my raster extents
I'm trying the gdalwrap command to set center and change the extent to -180 to 180. But for some reason, the bounding value is set but the pixel values are not transferred.
This solution not working: ...
- 117
0
votes
0
answers
195
views
gdal2tiles.py Only Creating Images for Max Zoom
I set off some tasks running gdal2tiles.py for certain rasters with a zoom range of 8-20. To my dismay I return the next day to find only images for zoom level 20 have been created. I understand that ...
- 77
0
votes
1
answer
129
views
Unable to merge TIFFs in one file using Warp and QGIS
I have three TIFFs are below which is belongs to Alaska HI Chart:
First https://drive.google.com/file/d/1KllacOdKNw866doqjMcounsvofpXBgFh/view?usp=sharing
Second https://drive.google.com/file/d/...
- 115
0
votes
1
answer
683
views
Orthographic Projection of Mars (MOLA) in QGIS - Visually correct results, wrong coordinates
I am trying to reproject the coloured shaded relief map of Mars (MOLA).
After many tries, I got an orthographic projection of the scene centred on the pole, however, the coordinates are wrong.
I ...
- 1
0
votes
0
answers
183
views
GDAL warp not transforming raster properly
I have a raster Tiff image which I want to reproject from EPSG:27700 TO EPSG:3857 in GDAL.
Using gdalwarp -s_srs EPSG:27700 -t_srs EPSG:3857 C:/test/input.tif C:/test/output.tif I have noticed that ...
- 137
0
votes
0
answers
277
views
Defining exact projection in GDAL command
I am using gdalwarp to convert a tiff from one projection to another.
I want to specify the t_srs as the same transformation/projection type I've been using in QGIS which reads as below
+proj=pipeline ...
- 137
2
votes
0
answers
109
views
Python - same GDAL command giving different results
I've been using GDAL warp to re-project a tiff I have.
On the GDAL commandline I use gdalwarp -t_srs EPSG:3857 C:/test/test_file.tif C:/test/test_file_gdal.tif
Similarly, I wanted to run this function ...
- 137
1
vote
1
answer
597
views
GDAL warp not aligning two rasters perfectly
I'm trying to align one raster to another using GDAL Warp. I've read that it's important to pick a reference image and use its extent coords, cell resolution and the -tap argument to force the second ...
- 707
0
votes
1
answer
315
views
How to mosaic/merge multiple tiles exactly, eliminating gaps?
I have multiple scenes from planet doves and I need to mosaic them together to have one raster.
I used build virtual raster in qgis and I have smth like this
is it possible to exactly merge without ...
- 315
1
vote
1
answer
114
views
Calculating terrain attributes before or after upscaling DEM
This is more of a theory question. I am working on a project that requires the use of topography data, I have a 1KM resolution global DEM to which I will be using GDAL to calculate general topography ...
- 11
0
votes
0
answers
367
views
gdalwarp reproject "Lambert Conformal Conic" to EPSG:4326 and stretch vertically to avoid shape distortion
I am trying to convert "Lambert Conformal Conic" into "map-like" representation (which is EPSG:4326 as far as I understood), so I used
gdalwarp -t_srs EPSG:4326 -of GTiff /tmp/src....
- 1
1
vote
1
answer
729
views
gdal_edit not find as internal command in Python
I am writing the geoinformation using the gdal_edit command using python in Jupyter notebook. Below is the syntax.
!gdal_edit -a_ullr -1.149576 85.247405 -92.762859 88.022318 -a_srs "+proj=...
- 83
1
vote
1
answer
67
views
Does GDAL 3.x/PROJ 7.x do some kind of bounds checking when doing a gdalwarp operation?
This is more of a question about how GDAL 3.x and PROJ 7.x work more than a question about how to do something. I have been experimenting with GDAL 3.4.2 and have noticed some things that are ...
- 441
0
votes
1
answer
288
views
ERROR 1: Too many points (441 out of 441) failed to transform when using gdalwarp to convert raster with compound projection
If I use gdalwarp to convert a simple ArcInfo ASCII grid with a compound projection (Geographic horizontal/meters vertical) to a GeoTIFF, I get an error message. Here's the input raster (asc_h84deg_vm....
- 441
1
vote
1
answer
135
views
GDAL Warp Using QGIS from AK_IFR to EPSG:4326 looks odd
I am using QGIS for converting tiff from AK_IFR to EPSG:4326 (CRS), but in QGIS tiff looking perfect
but while exporting it looks like this
Source Image Details: FAA IFR Chart
Extent -3738773....
- 115