All Questions
54
questions
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Produce ISEA "Icosahedral Snyder Equal Area" GEOTIFF/raster with gdalwarp
Is an icosahedral projection impossible to produce with PROJ/GDAL ?
Produce ISEA "Icosahedral Snyder Equal Area" GEOTIFF/raster with gdalwarp.
I am trying to use gdal tools to convert Plate-...
- 35
1
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0
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58
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gdalwarp raster reprojection is generating pixelated edges
I have a raster image, which is satellite data, that I would like to reproject using gdal on the command line.
The files I am using can be found here:
the unprojected image (.png)
.wld file
.msinc ...
- 93
2
votes
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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
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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
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1
answer
315
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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
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
1
answer
207
views
Clip Raster with Shapefile GDAL API
I am trying to clip a raster using a polygon an GDAL. The following code is running without an error but the ouputimage is all zeros. All files are in the same CRS. Is there a way to use GdalWarp with ...
- 3
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120
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Continental GeoTIFF Failing to Warp
I'm attempting to reproject/warp a series of raster images for continental Australia from Geographic GDA94 to Projected Geoscience Australia Lambert. However, aside from unexpectedly long processing ...
- 1
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2
answers
195
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Cannot extract by mask using gdalwarp
I am trying to extract data from a raster file using a Shapefile mask. QGIS suggests the following command:
gdalwarp -of GTiff -cutline SanFernando_basin.shp -cl SanFernando_basin -crop_to_cutline ...
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412
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How to find patches with data in Raster and then how to extract those patches?
I have a single band raster file as drawn in the labeled image attached.
The size of raster is around 4k pixel in each x and y axis. Large part of this raster is empty. Only in small portions of the ...
- 109
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5k
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The transformation is already "north up" or a transformation between pixel/line and georeferenced coordinates cannot be computed
I tried to warp a raster image, a old airplane image, for projection by using gdalwarp.
My code:
gdalwarp -t_srs '+proj=utm +zone=52 +datum=WGS84' 1954_airplane_photo.tif air_warp.tif
But, I had this ...
- 13
1
vote
0
answers
222
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Mosaicking raster tiles with different color palettes
I want to create a mosaic of 35 rasters using gdal.
Using
gdalwarp --config GDAL_CACHEMAX 8000 -wm 8000 *.tif abk.tif
I get a fairly small output file. But I've noticed that some colours are off.
It ...
- 157
2
votes
1
answer
165
views
Regular line pattern of flat pixels after using gdalwarp
I observe a regular pattern of flat pixel bands on a DEM reprojected using gdalwarp:
The red line represents a profile for which the following graph is an extract between the two squared dots, so it ...
- 10.5k
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529
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Clipping raster using multiple shapefiles using gdal in Python
I am currently using batch process in QGIS based on clip raster by extent to clip geotiff raster layers based on different shapefiles. I am trying to clip many raster layers from the same region with ...
- 66
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1
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554
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Converting shapefile to raster by passing specific column/variable using GDAL in Python
Followed the steps from this link to create raster from shapefile using GDAL
Convert an OGR File to a Raster
but it is returning an empty raster.
Can someone tell how to define a particular column ...
