37
votes
Merging all tiles from one directory using GDAL
You could create a virtual mosaic from all Tiff files:
gdalbuildvrt mosaic.vrt c:\data\....\*.tif
and convert it afterwards:
gdal_translate -of GTiff -co "COMPRESS=JPEG" -co "PHOTOMETRIC=YCBCR" -co ...
- 5,318
7
votes
Accepted
Combine multiple partially overlapping rasters into a single raster in R
The best solution to this is making a list of the rasters, then passing this to a function based on the apply family
The following code was pulled from a similar question wrapped into a function and ...
- 534
7
votes
QGIS more than 3000 raster works slowly
You may see considerable benefit if you load them into a single virtual raster (vrt). You can do that through the processing toolbox, by searching for "build vrt"
- 27.4k
6
votes
Accepted
Reprojecting raster with FME?
Agree to the comment of @FelixIP, one possible solution is to first create a whole raster using RasterMosaicker transformer, then reproject and re-tile the Raster with RasterTiler transformer. This ...
- 14.6k
6
votes
Accepted
reduceResolution failes in Google Earth Engine
You were almost there.
There were 3 mistakes in your code:
reduceResolution() needs a coordinate reference system (crs) of the input image so that it understands the resolution of the input image (...
- 1,267
5
votes
Combine multiple partially overlapping rasters into a single raster in R
Full credit to @Tom Higginbottom who answered the hard part but a small modification I made to fix the
Error in compareRaster(x, extent = FALSE, rowcol = FALSE, orig = TRUE, : different origin
Just ...
- 1,101
5
votes
Accepted
How import many raster in r?
Solution 1
Create a loop to iterate through files:
library(raster)
raster_files <- list.files(mypath,full.names = T) #use pattern = '.tif$' or something else if you have multiple files in this ...
- 13.2k
5
votes
Accepted
Image Export fails in Google Earth Engine because "export region contains no valid (un-masked) pixels
1st: The exact code you posted (https://code.earthengine.google.com/ce1a151ce06497b20cf1793715cb0120) did export the image correctly. So the error cannot be reproduced. May be, you changed the 'ROI' ...
- 9,975
5
votes
How to generate a collection of mosaic images by mapping over date list in Google Earth Engine
The following code creates a list of mosaic images, where each mosaic image is constructed from images of a specified time interval. Within each time interval, the "least cloudy pixel", determined by ...
- 5,371
5
votes
Accepted
Mosaic to New Raster outputs whole numbers instead of decimals
You need to change the Pixel Type (optional) to 32_Bit_Float or 64_Bit, if you want decimals:
32_BIT_FLOAT—A 32-bit data type supporting decimals
64_BIT—A 64-bit data type supporting decimals.
By ...
- 40.4k
5
votes
Accepted
Define original image ID for each pixel of Quality Mosaic in Google Earth Engine
I had the same problem when I created the 'Best Available Pixel' code (https://github.com/fitoprincipe/geebap), and I solved this way:
Add a band in which the value of every pixel is the number of ...
- 9,975
5
votes
Export mosaic to Google Drive, generating more than just one file and can't download this
You do not get a valid export geometry by using .getInfo(). As a result it looks like Earth Engine is exporting your image globally and thus creates a multitude of subsets (called shards).
If you ...
- 9,806
4
votes
How to create a mosaic in QGIS with cutline and feathering for Landsat-8 imagery
I am a developer of the open-source GIS Whitebox GAT, which contains several image processing tools including a tool called Mosaic With Feathering. I doubt that it is as sophisticated as ERDAS or ENVI ...
- 10.9k
4
votes
Accepted
Merging two rasters, obtain only highest values, overwrite raster in ArcGIS Desktop?
You can do this just by using the Mosaic to New Raster geoprocessing tool. Just choose maximum for your Mosaic Operator and the new raster will use the high value anywhere that they overlap.
- 1,936
4
votes
How put order in multiple raster file in RasterMosaic in FME?
In FME 2020.1
To order the rasters use the Attribute Creator and then assign a number (1,2 etc).
Then sort them by numeric (ascending)
Workspace template is available here
https://community.safe.com/...
- 49.5k
3
votes
Accepted
Zonal Statistics with very large mosaic in ArcGIS
To reduce the size of my project, I used Model Builder to iterate through all my tiles, and save them as integers (they were floats; this question was helpful). Then, I made a new mosaic out of these ...
- 121
3
votes
What method does QGIS Merge Rasters tool use?
The GRASS r.patch from the Processing Toolbox also does the work.
I could not manage to merge two rasters due to some file name issues and who knows what else, but with r.patch everything went smooth, ...
- 3,210
3
votes
Accepted
How can I use GDAL Merge with multiple files in one folder in python 2.7?
So you just want to mosaic all the tiles for a given day? That's a perfect Job for GDALs VRTs.
gdalbuildvrt mosaic_049.vrt 049*.hdf
or from Python for all days
import subprocess
import glob
for ...
- 9,806
3
votes
Clean up edges in raster mosaic
For remove black edge:
Goto the layer property of your image layer.
Then go to the symbology menustrip. Note: Do not compute histogram.
Remove check from “Display background value” and “Apply gamma ...
- 191
3
votes
Accepted
Creating raster stack using R?
Try
fs <- list.files(path="F:\\MODIS\\Modis EVI\\HDF8 EVI", pattern = "tif$", full.names = TRUE)
library(raster)
s <- raster::stack(fs)
writeRaster(s, "hdf8_EVI.TIF")
I have no idea what ...
- 8,156
3
votes
Accepted
Filling nodata value gdal.BuildVRT
Ok, i solved the error
the value in srcNodata must be a string "nan"
3
votes
Mosaic of rasters is big, black rectangle in QGIS?
TO merge raster layer, you can use the Merge raster layers tool. You can get the tool from Processing Toolbox -> GDAL/OGR -> Miscellaneous -> Merge raster layers.
But before the mosaic ...
- 40.4k
3
votes
Accepted
Combine multiple TIFF Files into one
You need to use Merge tool from Processing toolbox -> GDAL/OGR -> Miscellaneous -> Merge it has the option to Grab pseudocolor table from first layer that you need to check, as you can see ...
- 40.4k
3
votes
Accepted
Mosaic rasters with same suffix (python)
You question is not really a GIS question, more a question on how to group items in a list. But anyway if you start with a list of the rasters then you can do:
import arcpy
from arcpy import env
env....
- 68.6k
3
votes
Mosaic rasters with same suffix (python)
Your input image names all have the format part_part_image.tif, this makes it easier, using string.split('_') breaks up the name into ['part','part','image.tif'] from which we can use the 2nd element (...
- 25.5k
3
votes
Rasters in R - merge taking mean, excluding NAs. Overlay and Mosaic both giving funny results
I think the problem with:
water_mean_overlay <- do.call(overlay, c(water_rasters, fun = mean, na.rm = T))
is that na.rm=T is being passed to overlay, and the help for overlay doesn't show an na....
- 62.4k
3
votes
Accepted
How to generate a collection of mosaic images by mapping over date list in Google Earth Engine
I was able to solve the issue (with the help of Google Earth Developer Group's folks).
Use var mosaic = ee.Image(S1).blend(ee.Image(S2))
to mosaic instead of mosaic() and make sure the dates have non-...
- 684
3
votes
Accepted
Earth Engine: Mosaic 2 collections
Both dates you provide the collections contain multiple images over the sundarban region. A ImageCollection is a spatial as well as temporal collection of images. To display them you have to reduce ...
- 9,806
3
votes
Merging hundreds of rasters in QGIS to create a basemap
Solved it.
I think the source of the error I got building a virtual raster was some sort of character limit in the Build Virtual Raster tool. After adding the input files (400+ of them) some of the ...
- 61
3
votes
Accepted
For loop to Create lines of raster mosaics in ArcMap 10.5
A loop like this should do what you desire:
for x in range(6):
set_of_images = ';'.join(['D:/KKR/{}_cticlp.img'.format(str((18 + x * 8) + y).zfill(3)) for y in range(6)])
arcpy....
- 2,599
Only top scored, non community-wiki answers of a minimum length are eligible