RQGIS | RQGIS - integrating R with QGIS
kandi X-RAY | RQGIS Summary
kandi X-RAY | RQGIS Summary
RQGIS - integrating R with QGIS
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QUESTION
I try to use a map created in ggplot
to save as *pdf
in order to create a georeferencing pdf using the function sf::st_write()
without success. In my example:
ANSWER
Answered 2021-Mar-23 at 12:26There are two steps in the solution. First, you convert ggplot2
object in raster and second convert the raster created (myGeoTiffgg.tif
) to geoPDF (myGeoTiffgg.pdf
) using gdal_translate
in gdalUtils
package.
QUESTION
I would like to figure out the distance (in terms number of cells) from each cell in a raster of value 1 to each cell of value 0. Ideally the output would be another raster, where the value of each cell would be the shortest distance to a cell of value 0. Cells that were 0 in the original raster would assume the value of 0 since they are technically 0 cells away from a cell of value 0.
However, so far my search for how to do this has been unsuccessful. I believe that the proximity() command in QGIS does this, but to use the r extension to QGIS (RQGIS) requires downloading several items (SAGA, GRASS, and QGIS) via the command line, and I have been getting errors trying to install SAGA so would love it if someone knew of a way to do this exclusively with R.
Here is a raster containing 1's and 0's to serve as a reproducible example of this problem:
...ANSWER
Answered 2019-Jan-25 at 15:54raster::gridDistance gives you the shortest distance when having to go through neighboring cell centers
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