Questions tagged [resampling]
To alter the frequency of sampled data points in continuous data.
262 questions
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How gdalwarp calculates pixel values when reprojecting
I would like to understand deeply how resampling and reprojection works in gdalwarp. To do that, I created an example GeoTIFF in EPSG:25831, reprojected it to EPSG:3857 while using the cutline option, ...
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Raster does not have same number of rows and columns that needs for prediction
I want to prepare an LULC prediction map of 2030. For this I have LULC of 2010 and 2015 along with the DEM, slope, and distance from roads and rivers as driver variables. Now LULC maps are of 24 m ...
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How to increase the number of cells in my raster without resampling
I have a raster with a certain cell size. I would like to generate a new raster that has exactly 4x as many cells as my original raster, by replacing each cell with 4 cells of the same value that each ...
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Cropping and resampling distorts raster
I've been struggling to find out why my raster cropping isn't working. I've included the raw raster files here so it should be a fully reproducible example.
I'm trying to implement the following ...
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Grass r.resamp.stats Outputs no data where there is data in the original raster
I am very new to working with QGIS and geospatial data. I am working with a raster data set that I have generated externally and loaded into QGIS. The original raster is high resolution but very ...
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Resampling and finding area of pixels simultaneoulsy using terra R package
Consider I have a 30m binary raster with values 0 and 1, where 1 is categorical and is a land cover type. I would like to resample this raster to 1km such that the resulting raster has pixel values of ...
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KeyError in Resample when using ArcPy [closed]
I have a folder of annual land cover .tif rasters that are 30m x 30m. I'm trying to resample them to 90m x 90m using a for loop that goes through the folder. I'm not sure if I'm missing anything. My ...
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Huge file size after resampling
I want to co-register a DEM file with 100m resolution with a landcover file of 10m resolution. Thereby the DEM file is resampled to match the 10m resolution.
Obviously, the file size of the new DEM ...
- 69
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How to resample an ImageCollection in Google Earth Engine using bicubic method
I am trying to resample a Sentinel 2A ImageCollection in Google Earth Engine using the bicubic method. However, the resulted map is weird. I am using the folloiwng code. I apprecite if somebody help ...
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how does rioxarray reproject match resample the data?
What method is used to resample within rioxarray reproject match? Looking into resampling in rioxarray it seems to use rasterio which defaults to nearest resampling. Should I assume this is what is ...
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How does one resample a 20m resolution satellite image to 10m resolution, such that it matches a native 10m resolution image?
I am trying to use Python to perform my GIS analysis.
Background:
I have 2 satellite images, one with 20m resolution and a second with 10m resolution.
Goal:
Have both satellite images at 10m ...
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GeoServer ImageMosaic resampling method
I want to publish orthophoto images as a WMTS service in GeoServer. I have approximately 4000 ortho images in *.TIFF format without pyramids. How can I change the resampling method of the resulting ...
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Generating DEM that gives realistic contour
I am quite new QGIS user. I have point data from the field and I generated DEM and contour. However, the contours are a bit unrealistic. I have attached the image. The green contour is the contour ...
- 147
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425
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QGIS - keep square pixels in resampling
I have a raster file (asc) with a resolution of about 10m, square pixels and an extent of X: 15929 Y: 16159. I am trying to resample this to a larger resolution (tried 20 and 30m). However, the output ...
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QGIS simple downsample of a raster
I'd like to downsample a DEM raster from 2m per pixel to 8m. I've tried using SAGA Multilevel B-spline interpolation (from raster) as suggested here, but though that results in an 8m resolution it ...
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