Skip to content

Search Archives

Search tips
from:Name Search by author name, e.g. from:Duncan Murdoch "exact phrase" Match an exact phrase word1 word2 Match messages containing both words Date range Use the date pickers to filter results to a time period

Use the list dropdown to narrow results to a specific mailing list. Combine from: with other terms to filter by author and content.

3 results for “from:Rik Ferreira”

Difference between area calculations by QGIS and sf package
Rik Ferreira · Sep 27, 2021 · r-sig-geo

Dear list members, Why does sf::st_area returns a different area than the output of QGIS $area for the same geometry? A reproducible example (state of Minas Gerais, Brazil): library(sf) > mg <- geobr::read_state(31) > st_area(mg...

How to export a GeoTIFF 8 bit raster
Rik Ferreira · Jan 30, 2022 · r-sig-geo

Hello! How a raster image can be exported as a 8 bit GeoTIFF image? I'm downloading a 8 bit image from this link: http://geoinfo.cnps.embrapa.br/documents/2918/download, cropping it with a vector mask, treating it...

Difference between area calculations by QGIS and sf package
Rik Ferreira · Sep 27, 2021 · r-sig-geo

Dear Roger, thanks for the explanation. The error between QGIS and sf drops a lot with sf_use_s2(FALSE) but it's still bigger than 0. I believe it is due to different parameters passed because GEOS and PROJ...

Can't find what you're looking for? Try searching with Google .