[R-sig-eco] terra package SpatVector format

[José Hidasi Neto]

Thanks for the answer, Sarah. I solved the corresponding problem.

Best,
José

Em seg., 20 de nov. de 2023 12:47, Sarah Goslee <sarah.goslee using gmail.com>
escreveu:

> Hi,
>
> I think terra::crs() does what you are looking for.
>
> More broadly, I think your workflow would be more efficient and
> simpler if you take the time now to switch over to terra functions
> like terra::project(), rather than retain so many sp functions.
> There's excellent documentation available here: https://rspatial.org/
>
> Sarah
>
> On Sun, Nov 19, 2023 at 11:39 PM José Hidasi Neto <hidasineto using gmail.com>
> wrote:
> >
> > 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
> >
> >         [[alternative HTML version deleted]]
> >
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>
>
>
> --
> Sarah Goslee (she/her)
> http://www.numberwright.com
>

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