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Results tagged with raster
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user 134283
Raster is a data format consisting of regular grids of values, usually stored in an image-like format.
2
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0
answers
253
views
Which method is most suitable to change the pixeltype of the raster in PostGIS?
I have saved a raster in the PostGIS database and want to select it as PNG. However, ST_AsPNG only accepts rasters with pixel type 8 BUI or 16 BUI. … But in this case it is a raster with pixel type 32 BF.
The only possibility I have seen so far is ST_Reclass. …
- 330
0
votes
1
answer
86
views
Seeking"Fill nodata" tool in ArcMap
I have some NoData cells in my grid (landuse) which I want to fill depending on the neighbouring cells - more precisely the edges. In QGIS there is a tool from GDAL that does exactly that.
Is there an …
- 330
0
votes
Seeking"Fill nodata" tool in ArcMap
I found an useful tool: shrink.
It "shrinks the selected zones by a specified number of cells by replacing them with the value of the cell that is most frequent in its neighborhood".
- 330
1
vote
1
answer
4k
views
Rasterio to convert a GeoTIFF into a GeoJSON in Python [closed]
I am currently working in Python and would like to convert a raster GeoTIFF into a GeoJSON. …
- 330
1
vote
1
answer
47
views
Showing number of added satellite images in PostGIS
I want to check how many bands of a satellite image have been added to a PostGIS raster table. … I know that you can get information by \d raster_columns (as told at PostGIS raster maximum number of bands? …
- 330
1
vote
1
answer
495
views
How to properly use JOIN or GROUP By for ST_Union in PostgreSQL with PostGIS extension [duplicate]
I want to cut a raster with a polygon. The raster is stored in tiles in the PostGIS database, as is the polygon.
To find out the overlapping areas I wanted to use ST_Clip or ST_Intersection. … Since the raster is stored in tiles and no empty raster should be returned, I want to join the tiles of the raster with ST_Union first and then apply ST_Clip or ST_Intersection. …
- 330