[R-sig-eco] terra package SpatVector format

[José Hidasi Neto]

Hello everyone,

I'm trying to update my package "bivariatemaps", but I'm having a problem
with SpatVector and SpatRaster formats from the new terra package.

For example:

GridFilter<-function(shape, resol = 1, prop = 0){
  grid <- terra::rast(terra::ext(shape))
  terra::res(grid) <- resol
  *sp::proj4string(grid)*<-*sp::proj4string(shape)*
  gridpolygon <- terra::rasterToPolygons(grid)
  drylandproj<-sp::spTransform(shape, sp::CRS("+proj=laea"))
  gridpolproj<-sp::spTransform(gridpolygon, sp::CRS("+proj=laea"))
  gridpolproj$layer <- c(1:length(gridpolproj$layer))
  areagrid <- terra::expanse(gridpolproj, byid=T)
  dry.grid <- terra::intersect(drylandproj, gridpolproj)
  areadrygrid <- terra::expanse(dry.grid, byid=T)
  info <- cbind(dry.grid$layer, areagrid[dry.grid$layer], areadrygrid)
  dry.grid$layer<-info[,3]/info[,2]
  dry.grid <- sp::spTransform(dry.grid, sp::CRS(sp::proj4string(shape)))
  dry.grid.filtered <- dry.grid[dry.grid$layer >= prop,]}


When it tries to use pro4string on the grid and the shape, it doesn't work.


sp::proj4string(grid)Error in (function (classes, fdef, mtable)  :
  unable to find an inherited method for function ‘proj4string’ for
signature ‘"SpatRaster"’


sp::proj4string(shape)Error in (function (classes, fdef, mtable)  :
  unable to find an inherited method for function ‘proj4string’ for
signature ‘"SpatVector"’



Is there any function that works with these new formats?

All the best,
José Hidasi-Neto
-- 
José Hidasi Neto
Ph.D. in Ecology and Evolution
Lattes:
http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4293841A0
My blog about science and R: https://rfunctions.blogspot.com

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