All Questions
98
questions
0
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0
answers
42
views
GDAL Warp extremely slow on Python API
I am trying to export one VRT to TIFF using GDAL Warp. My VRT has some scale, offset, reprojections, etc, but nothing too crazy.
I have observed that trying to perform the warp from the Python API is ...
0
votes
1
answer
40
views
Transforming ortho (.tiff) file from one epsg to other epsg
I am using GDAL to transfrom ortho from one EPSG to other EPSG.
In my case I have used EPSG:32610 which is in (m) and transformed into EPSG:2227 which is in (us-ft). I am able to transform it using ...
0
votes
0
answers
55
views
Warp result of GDAL translate jpg to geotiff using osgeo.gdal
I am attempting to warp a geotiff created from gdal.Translate where the original file was a jpg. I first obtain the ground control points from a co-located text file. The results of gdal.Translate ...
- 111
0
votes
0
answers
67
views
GDAL warp removing half of the map
I am using gdal warp to transform a geotiff between espg:4326 to epsg:3857, I have successfully done this previously on similar images but with the current geotiff it doesn't seem to be working. I am ...
0
votes
1
answer
184
views
Passing geometry dataset type to gdal.Warp() for a clip operation - order of operations and file type confusion
Trying to wrap my head around the correct order of operations and file type(s) required by gdal.Warp().
I have a valid geometry object created from the shapely object.unary_union.convex_hull method. ...
- 109
1
vote
1
answer
326
views
gdal.WarpOptions not accepting srcBands argument?
Defining as follows:
warpoptions = gdal.WarpOptions(format = 'GTiff', outputType = gdal.GDT_Float32, srcBands = [1], dstBands = [1], dstSRS = 'EPSG:4326', dstNodata = 0, resampleAlg = 'cubicspline', ...
- 13
0
votes
0
answers
452
views
Vertical transformation of DEM from EPSG:3035 to EPSG:4326
I am trying to convert a DEM file from EPSG:3035 (ETRS89-extended / LAEA Europe) to EPSG:4326 (WGS 84) with gdalwarp. EPSG:3035 uses the European Terrestrial Reference System 1989 ensemble datum where ...
- 329
1
vote
1
answer
2k
views
gdal.warp in Python script
I've a .tif file in EPSG:3426 and i'd like to convert it in UTM, zone 33, scale: meters.
In gdal I use:
gdalwarp -t_srs "+proj=utm +zone=33 +datum=WGS84 +units=m" image_input.tif image_utm....
- 31
0
votes
1
answer
245
views
Python subprocess not recognising gdalwarp option
I have been trying to use the subprocess module in python to perform the gdalwarp command.
To do so, I have done it like so
# use pixel size for GDAL WARP command
print('Pre warp')
warped_file = ...
0
votes
0
answers
133
views
Fixing gdalwarp bounding box when trying to orthorectify using GCPs
I'm trying to orthorectify a raw, raster satellite image with a set of ground control points (GCPs) using gdalwarp. I first create a temporary tif to add in the GCPs using gdal_translate, then I ...
- 13
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
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
832
views
Georeference and rotate an image using GDAL and Python
I have a drone image with no spatial reference (ungeoreferenced). I know from some calculations the coordinates of the upper left corner, and X and Y resolutions. I was able to georeference the image ...
- 528
0
votes
1
answer
182
views
Polygonizing global raster using Python/GDAL?
I'm looking to polygonize a global raster with 29 different categories. However, when I try to run it in QGIS, it either crashes or takes forever to load.
I'm now trying to run it in python.
import ...
- 221
0
votes
0
answers
56
views
Down Sample Resolution Change Band Sum
I collected information from WorldPop about the Italian population in 2000 that is a geoTiff with a spatial resolution of 100m. The data can be downloaded here.
I would like to change the resolution ...
- 269