All Questions
9 questions
0
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21
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stars and st_apply: summarise NetCDF for each timestamp and create multiple new attributes
I have a stars-object like this one:
https://drive.google.com/file/d/1qcMATPjSyw-Rk9WpfFTa1rpr7dtOUxsu/view?usp=drive_link
It looks like this:
nc = read_stars("~/Desktop/SPARTACUS - Spatial ...
- 1,379
0
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0
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590
views
How can I project very large rasters with terra, raster or stars packages in r?
I am trying to project a very large raster (about 7GB each) from NAD 1983 UTM Zone 16N to Wisconsin Transverse Mercator (ESPG:3071) and neither the terra nor the raster package seem to work. Terra ...
- 91
0
votes
1
answer
211
views
Find cells with maximum value per dimension in stars object (R)
I would like to find the cells, and their corresponding centroid, that hold the maximum value for each band in a multiband raster.
Converting the stars-object to a sf-dataframe makes this easy somehow....
- 1,379
1
vote
1
answer
359
views
Modify raster coordinates (wrong projection) using stars or terra
I downloaded a raster image from the following address, which corresponds to rivers and streams in the Barcelona area.
https://geoserveis.icgc.cat/icgc_geotecnicbcn25m/wms/service?REQUEST=GetMap&...
- 157
1
vote
0
answers
208
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Recursively mosaic rasters by directory (year) in R
I have hundreds of rasters spanning 10 years, files are stored by year (e.g., 2020, 2019, 2018, etc.). I would like to mosaic all the raster files within a directory, move to the next directory and ...
- 1,455
4
votes
1
answer
2k
views
Mask a (raster) stars object in R with a vector (sf) object
In this question an stars object is masked with a raster object. But it is not clear to me how the masking can be done with a vector object using the stars pkg.
Consider the following example in terra....
3
votes
2
answers
823
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What's the most efficient way to calculate line length per raster cell in R?
Problem
I'm looking for an efficient, memory friendly to calculate total line (vector data) length per raster cell.
The question of line length per cell has already been posed here in 2014 and a few ...
- 216
1
vote
2
answers
141
views
Is there an equivalent of "isLonLat" function in terra package in R?
I am refactoring my code which extensively relied on raster package to now use the newer and better terra package. I was making use of the isLonLat() function that returns TRUE if the crs of a raster ...
2
votes
1
answer
560
views
Expand stars-raster in R
In the r-package terra there is the function terra::extend. To my understanding it just expands the raster with no data values on each side right?
I wanted to do something similar, but using a stars ...
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