All Questions
93
questions
0
votes
0
answers
21
views
Coordinate projection transformation Mars image from Ocentric Equirectangular to Transverse Mercator in Python
The task is to re-project the Mars image from Ocentric Equirectangular projection to Transverse Mercator.
I'm trying to do this in gdal in python.
In terms of Transverse Mercator projection, there is ...
0
votes
0
answers
31
views
Translating (cropping) a GeoTIFF file to a specific extent but ending up with a different final extent
I'm trying to crop a larger GeoTIFF file to a smaller extent.
The darker GeoTIFF file in the middle has the extent I want to reproject to. I've used the following command to do the translation:
...
- 1
1
vote
0
answers
35
views
Bad values with gdalwarp and "aliased" coordinate transformation
I've strange values using gdallocationinfo on vrt with coordinate system transformation.
Here is my use case, maybe you can help to understand what I did bad or misunderstood
1) I've got a bunch of ...
- 61
1
vote
2
answers
263
views
Reprojecting each tif located in Folder Directory using GDAL in Python [closed]
Python beginner here. I am using python to reproject a folder of rasters (.tifs). Each raster has a projection that I want to change to WGS 1984 (espg:4326). I want to use an open-source GIS library ...
0
votes
0
answers
162
views
Coordinate transformation with GDAL replicating Geotools Java package transform
We are developing an earth observation data processors utilizing GPU.
One of the operation trying to achieve is the coordinate transform. For some rasters the output CRS intended would be some local ...
- 103
1
vote
0
answers
221
views
How to convert elevation data from WGS84 ITRF2008 to NAD83 CGG2013a
I need to convert elevation data captured in WGS84 ITRF2008 to NAD83 CGG2013a.
I came across with GPS-H from NRCAN and downloaded the Geoid Model file (CGG2013ai08.byn) from here.
Although I use a ...
- 1,745
1
vote
0
answers
82
views
GDALWarp Reprojecting raster extent from (0, 360) to (-180, 180) filling left hemisphere with blank data
Understanding that this question has been asked a few times (Reprojecting raster from 0 360 to -180 180 with cutting 180 meridian using gdalwarp seems to be the canonical one), I've found that any ...
0
votes
1
answer
759
views
GDAL: Reprojecting geotiff from LATLONG to UTM
I have a file in geotiff format, with coordinates in WGS84.
I would need to convert from WGS84 to UTM.
When I launch the code via GDAL:
gdalwarp -t_srs '+ proj = utm + zone = 37 + datum = WGS84 + ...
- 1
1
vote
1
answer
145
views
GDAL coordinate transformation not aligning with QGIS coordinate transformation
I have a raster being changed from EPSG:27700 to EPSG:3857 coordinate reference system.
Within the QGIS application, I have found this coordinate transformation to fit the best
I've tried to ...
- 137
1
vote
0
answers
207
views
Creating custom initial projection in GMT/GDAL
I have a number of images which I need to project into the standard IAU 2000 lunar coordinate system. Each is defined in terms of an oblique cylindrical projection, and I am given the rotation pole/...
- 11
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
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
0
answers
52
views
GDAL_translate and HEGtool
I am using GDAL to convert a huge dataset of HDF into GEOTIFF. When I tried with the HEG tool the tiff file was according to my requirements, but when using GDAL I think the projection gets shifted ...
0
votes
0
answers
787
views
Reprojecting GeoTIFF from EPSG:4326 to EPSG:3857 with GDAL
As an example I am using the following GeoTIFF image: BlackMarble_2016_3km_geo.tif - 61 MB - GeoTIFF
I am trying to reproject from EPSG:4326 to EPSG:3857 with the following GDAL command:
gdalwarp -...
