All Questions
11 questions
2
votes
0
answers
69
views
How do I batch-assign NoData values?
I have a number of rasters I need to mosaic together. The areas with data are within a rectangular "nan" envelope. The "nan" envelopes of different rasters overlap each other. No ...
- 151
3
votes
1
answer
73
views
Fixing errors in old DTM in QGIS
I'm currently working on fixing some errors in some old DTMs.
The issue is there are pixels with a value of "-1.4013e-45" which are all over the rasters. I'm looking for a way to remove ...
0
votes
2
answers
456
views
rasterio.fill.fillnodata doesn't work as expected
I have a DEM of a lake bottom, that contains a few holes (nodata) which I'd like to fill. For that purpose i'm using rasterio's fillnodata with a mask. Unfortunatly, I don't get the results I am ...
- 187
0
votes
1
answer
292
views
Change missing areas value(0) to other in Google Dynamic World Landcover Yearly Mode Mosaic to not mix with water class (also 0)
When I create a yearly mode mosaic using Google Dynamic World Landcover Data, the areas with missing landcover values especially in high Himalayan regions(perhaps due to the 35% cloud threshold) are ...
- 29
1
vote
0
answers
42
views
How to get novalue data of xyz points
I have multibeam and single beam xyz points.
I am looking to do the exact same process as Patch over raster A with values from raster B where raster A values are nodata in GDAL as I want to infill the ...
- 23
1
vote
1
answer
487
views
How to make certain part of raster as no data with other overlapping raster?
I have two rasters, one raster contains all the ground features (roads, buildings, Trees etc) and another raster contains only man made features (Roads, buildings etc). I would like to have raster ...
- 21
3
votes
1
answer
990
views
Add a nodata mask or alpha band to read-only image?
How to add a nodata mask or alpha channel to a source image that is read-only or should be treated as such?
For example I have this satellite image that uses jpeg compression in a geotiff. Since the ...
- 28.3k
3
votes
0
answers
185
views
Is it possible (and how) to mask NoData values using Scikit-learn PCA?
I have to carry out a Principal Component Analysis (sklearn.decomposition.PCA) on a dataset composed of several images. Some of these images have very large gaps due to the removal of clouds.
Is there ...
- 89
0
votes
0
answers
486
views
Adding two rasters results in negative infinity and positive infinity
I'm trying to create a hydro-flattened DEM according to USGS specifications. I have two rasters, a DEM of my study area and a raster that only contains the water bodies that I have flattened so the ...
- 307
2
votes
1
answer
272
views
Reducing file size by not storing no-data points
I have to compute sea wave forecast for large period of time. Land information is of no use here.
Is there any file format that allows to not store no-data/fill values for land area to reduce file ...
- 85
0
votes
1
answer
3k
views
How to convert to NoData in Google Earth Engine?
I have the next code:
I am trying to make a mask (only one shape that I would like to use as an analysis region) with: all elevations less than 4.100 meters (from DEM), all area with water (NDWI) and ...
- 393