Questions tagged [gdal-merge]
A utility used to merge small image tiles to create a bigger image
1
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0answers
26 views
Error in Raster/Merge tool
I am completely new to QGIS. I am on a Mac using OS 10.13.6. I have installed QGIS 3.6, and installed Python 3.6.8 per install instructions. I opened a terminal window to check python install:
...
0
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1answer
25 views
Blown out TIFF image after merge in QGIS?
I'm attempting to merge four GeoTIFF images in QGIS for the first time and am getting unexpected results.
Navigating to Raster --> Miscellaneous --> Merge..., I set up the merge as follows:
Once the ...
1
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0answers
18 views
gdal_merge novalue
I managed to run gdal_merge for multiple geotiles (jpeg).
I am using the following options:
command = "gdal_merge.py -init 0 -a_nodata 0 -co COMPRESS=LZW -co BIGTIFF=YES -o "+out_bez+" -of gtiff " +...
0
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0answers
17 views
gdal_merge adds black borders
I'm using gdal_merge.py to merge a few GeoTIFF's into a GeoPackage. The source files are UTM33 projection, 3 bands (RGB) without Nodata tags. They make up a non-rectangular mosaic, so gdal_merge ...
0
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0answers
30 views
Merging many files on Python?
I'm new to Python. I tried to call gdal_merge.py
import sys
sys.path.append('C:\Program Files\QGIS 3.6\bin\gdal_merge')
import gdal_merge as gm
gm.main(['', '-o','C:\12\Merged.tif','C:\..\...
0
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0answers
67 views
osgeo4mac QGIS 3.4.4 issues with gdal's merge
I'm trying to run the gdal mosaic tool from QGIS3 homebrew osgeo4mac, but when I run it I get this error:
2019-02-11T18:25:17 INFO gdal_merge.py -ot Float32 -of GTiff -o /private/var/folders/...
0
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1answer
144 views
Using GDAL to extract Corner Coordinates based on a jpg file's GPS EXIF data?
I have ~100 jpeg images taken by a Drone. I tried to use gdal_merge to merge them and create a big tile GeoTIFF image. gdal_merge spends lots of time, and in the end, it just put each jpeg image ...
0
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0answers
214 views
Error while creating large TIFF with gdal_merge
I need to merge two TIFFs into one, but the output is larger than 4 GB. So, it needs to be a BigTIFF. But the "BIGTIFF=YES" creation option seems to be ignored. Here's the error:
$ gdal_merge.py -...
1
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1answer
58 views
Why isn't merge in QGIS working for me?
I am attempting to merge 153 geotifs into one large geotif of the Portland area. This is what my rasters looked like before the merge:
Here is a zoomed in image:
This is what the raster looks like ...
2
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0answers
144 views
gdal_merge.py not executing
When I type gdal_merge.py into Terminal, the output is -bash: gdal_merge.py: command not found.
I installed 3.4.0 Madeira [from this link] for macOS 10.13 (https://www.qgis.org/en/site/forusers/...
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0answers
89 views
Keeping band names with gdal_merge.py?
I am using gdal_merge.py to merge different mosaic rasters each contains 20 bands with different names. However, when using gdal_merge.py the bands are renamed as band1, band2, ..., band20. How can I ...
0
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1answer
235 views
Using gdalwarp to merge bands into a mosaic created by gdal_merge?
I have created a mosaic with gdal_merge.py using the following command:
gdal_merge.py -createonly -separate -co PHOTOMETRIC=RGB -o merged.tif LE07_L1TP_046030_20180810_20180810_01_RT_b3.tif ...
1
vote
1answer
144 views
Georeferencing metadata in GeoTIFF files
I am generating maps as TIFFs using the raster package (writeRaster) in R to generate small tiles, then as a final step, combining the tiles via the GDAL script gdal_merge.py.
I thought the resulting ...
1
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1answer
167 views
Unable to use gdal_merge.py from Python Script
If I execute this script in windows with x86 Python, works just fine. Also from command line directly.
import os, subprocess
gm = os.path.join('C:\\', 'Program Files (x86)', 'GDAL', 'gdal_merge.py')
...
1
vote
1answer
199 views
How to edit the metadata for individual bands of a multiband raster, preferably with GDAL?
I created a multiband raster using the gdal_merge.py utility where each band represents a measurement from a different year:
gdal_merge.py -o stack.tif -ot float32 -separate -a_nodata -9999 DEM_2012....
1
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1answer
224 views
How to display a bright and realistic GeoTIFF using GDAL?
I am using GDAL (gdal_merge) to put together some landsat photos using the proper bands. When I open the GeoTIFF that is created using gdal_merge (in Windows), the GeoTIFF is super dark. Now, when I ...
1
vote
1answer
46 views
Corruption of export using Merge feature in QGIS 3
Using QGIS 3.2.0 - Bonn
I'm getting a nasty corruption when trying to use the Merge feature to pull together a selection of .map (OziExplorer) files and merge into a single .bmp file. They load in ...
0
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1answer
137 views
How to mosaic two tif data by gdal_merge [closed]
my method is as follows(Some paths have been omitted.)
enter code here gdal_merge.py F:\test_data\LC81210402013278LGN00_B1.TIF F:\test_data\LC81220402013285LGN00_B1.TIF -o F:\mo529.tif
but failed,...
0
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1answer
809 views
Raster mosaic error: Format driver GMT does not support creation and piecewise writing
I am novice in using QGIS and other GIS software and am trying to create mosaics of NOAA raster nautical charts. Using pulldown menus, I entered raster>misc>merge and chose two NOAA charts and then ...
3
votes
1answer
716 views
gdal_merge.py not found
I'm newbie with Linux and QGIS. I'm using Ubuntu 18.04 LTS and QGIS 3.0 Girona and I can't do mosaic from a raster pile because the following log error message returns:
Processing algorithm… ...
0
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1answer
200 views
JPEG compressed Geotiff files convert to JPEG without loss
I am new to GIS application and had just started working with Geotiff files.
Background:
Currently, I am provided with big Geotiff files around 200 MB - 500 MB each as raw data from my vendors.
Are ...
2
votes
0answers
184 views
GDAL merge of DEM data resulting in large black tiles, elevation min/max problem?
I am new to QGIS (former Arc user) and having trouble with the raster merge tool.
I am merging 7 tiles of SRTM arc 1 data to cover a province in eastern Ecuador. Data is resulting in large areas of ...
2
votes
2answers
422 views
How to control band order generation in GDAL Merge?
I am trying to merge a total of 8 GeoTiff files (each one representing a single band) into a single TIF file using Gdal Merge in QGIS. The tool works, but does not allow me to select the order that ...
0
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0answers
166 views
gdal_merge: ERROR 1: Attempt to create 590x-369 dataset is illegal,sizes must be larger than zero
I am attempting to merge 600+ .tif files using gdal_merge.py (GDAL 2.2.2, released 2017/09/15) but I'm getting this error:
ERROR 1: Attempt to create 590x-369 dataset is illegal,sizes must be
...
5
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0answers
239 views
When should I use gdal_merge.py?
When building a single georeferenced image from a collection of tiles, gdalbuildvrt followed by gdal_translate is much faster than gdal_merge.py.
In my own measurements of
gdal_merge.py \
--...
0
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1answer
237 views
gdal_vrtmerge.py vs. gdalbuildvrt
In the gdalbuildvrt documentation, I read
This utility is somehow equivalent to the gdal_vrtmerge.py utility [...]
So what is the difference (if any) between gdalbuildvrt and gdal_vrtmerge.py?
...
1
vote
1answer
1k views
Using multiple tiff files as a data store in Geoserver
I have hundreds of tifs I want to use as a data store on my Geoserver. So many that QGIS won't merge them for me. I heard some about .vrt but I never found a clear source of information on the ...
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0answers
64 views
GMT instead GTiff while merging rasters: error message [duplicate]
My question is linked to that post (Saving an output file during merging on QGIS) as I have exactly the same issue but as the guy couldn't provide screenshots and the post is unachieved, I ask again ...
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0answers
580 views
How to fix positive North-South Pixel size in GeoTIFF with GDAL
I have issues with some GeoTIFF raster files with positive NS resolution (North-South)
gdalinfo gave me this:
Pixel Size = (1.000000000000000,1.000000000000000)
I run into all kind of problem with ...
1
vote
2answers
408 views
Merge tiffs into a single multi banded tiff
I have two geoTIFFS. The files cover the exact same area, both have 1 band(Block = 256x256) and both have a no data value of 0. They also have the same coordinate system.
I want to merge the files ...
2
votes
1answer
312 views
gdal_merge'd files take more space
I have two 3.6 MB GeoTIFF compressed with LZW. When I merge them with:
gdal_merge.py *.tif -o ~/out.tif -co COMPRESS=LZW -co BIGTIFF=YES
The files is 10x larger at 31 MB.
Is there some reason the ...
0
votes
1answer
244 views
gdal_merge.py just copies first input image
I am working with Sentinel-2 data, which I want to collect for a ROI that unfortunately is covered by two different (neighboring) granules. After downloading the granules, I cut them and convert them ...
2
votes
1answer
674 views
How to merge multiple geotiffs by the maximum value using gdal_merge.py?
I'm try to use the gdal_merge.py to generate a a big composite image considering the maximum value per pixel (to avoid the no data value).
But I didn't find this option for gdal_merge.py.
My code is:...
3
votes
1answer
462 views
Raster merge leaves gap where one file has no data
So I gave up on using the Raster|Misc|Merge... command in QGIS because it always crashes. I tried using the merge tool from the GDAL/OGR Processing Toolbox instead. That runs OK, but it puts a gap ...
3
votes
1answer
663 views
Merging Multiple JP2 image files on QGIS
I have about 150 Images that I need to merge together. I have tried to go about this by using the GDAL misc > merge tool but it is too much for QGIS to handle with even 20 images at a time. I was ...
4
votes
1answer
1k views
gdalbuildvrt vs gdal_merge on overlapping images
I once have used gdalbuildvrt on georeferenced images. That was okay when images did not overlap, It was also time efficient compared to gdal_merge or gdal_warp. Now I have overlapping images and ...
3
votes
2answers
439 views
How to merge raster scenes while maintaining small file size?
I have 4 scenes of raster images that I need to merge. Average size of the scenes is only 60 MB, but the merged scene ended up at 6 GB in file size. Does anyone know why this happened?
6
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1answer
279 views
Creating empty space when merging multiple GEOTIFF files?
I have multiple GEOTIFF files containing information regarding atmospheric parameters. Due to a lack of data in certain regions, I've had to do my geospatial processing separately on them.
Now I'd ...
4
votes
1answer
460 views
Creating RGB composite using GDAL: resampling?
I want to use gdal_merge.py for creating rgb composite from 3 bands with the same qualities (resolution, crs..), but here I found that gdal_merge.py is using nearest neighbor resampling method.
Is ...
8
votes
1answer
3k views
calling gdal_merge into python script
I am new to python and breaking my head on how to use gdal_merge in a (spyder) python script. I use Windows 10, Python 3.6 and have the gdal tool installed from osgeo4w. I realize many other posts ...
3
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1answer
2k views
get rgb images from sentinel-2 using gdal
i have some troubles to get RGB true colors image from sentinel satellite bands
wich produce this
to me it looks not natural at all
also i have tried gdal to do the merge with :
gdal_merge -o ...
2
votes
1answer
480 views
gdal_merge.py cannot import gdal in Windows 7 Anaconda GDAL Installation
I have an installation of GDAL through Anaconda that is mostly working, but it throws an ImportError whenever I run gdal_merge.py:
Traceback (most recent call last):
File "C:\Users\xxx\AppData\...
1
vote
1answer
731 views
Nonstandard GDAL and BIGTIFF: Is there a hidden flag / env variable?
I'm having some trouble with GDAL and BIGTIFF support. I work on a multi user cluster, and the defaults for GDAL are 1.9.2 there. I've built GDAL 2.1.3, libtiff, libgeotiff, and proj4, making sure ...
3
votes
2answers
351 views
pyqgis processing runalg release input in windows
I am having problems with deleting files on disk after using "processing.runalg()" in a plugin I created when running it in windows. I have no problem in linux.
I found an issue regarding the same ...
4
votes
1answer
298 views
GDAL_Merge Creates Washed Out Image
I'm attempting to use gdal_merge to stitch together four JP2 aerial orthophotos. the merge is successful, but the resulting image has washed out color, as you can see here:
All color in the four ...
4
votes
1answer
328 views
Permission problems using GDAL
I know this kind of problem as been posted previously, but I can't solve my problem with the answers.
I'm running a simple gdal_merge command, but I get shut down every time by permission problems. I'...
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1answer
266 views
What is the order of raster after stacking them?
When I merge a lot of raster files I don't know what is the order that they forward in the new file (stacking).
How do I know the name of band 1 (and others ones) in the other file that I have had ...
4
votes
1answer
1k views
Where is layer stacking from merge raster tool of qgis?
In the newest version of Qgis (2.18) there isn't layers stack option in order to merge raster bands. So tried to merge Landsat bands in only one file and I couldn't.
What can I do to stack bands of ...
3
votes
1answer
420 views
gdal_merge.py with memory constrains
I export bunch of DEM files (10000x5000) from Photoscan and I need to combine them with gdal_merge.py but the problem is that it consumes all the memory availible and can't finish processing.
What ...
0
votes
1answer
561 views
Set one output band's no data value with gdal_merge.py
I'm trying to stack two images with gdal_merge.py -separate so that I can use the NoData values in the second band to mask the first band (was going to use gdal_translate -b 1 -mask 2). The first ...
