[R-sig-Geo] using mapview to plot raster with integer values

[Tim Salabim]

Hi Paolo,
I am assuming the raster is being warped/projected upon rendering. By
default we use 'bilinear' resampling.

2 possible solutions:

1) set the method for projecting with mapview(rst, method = "ngb") for
nearest-neighbor resampling
2) set mapview(rst, native.crs = TRUE) so that the raster does not get
projected and hence not resampled (though you'll lose the background
maps).

HTH
Tim

On Fri, Nov 12, 2021 at 2:10 PM Paulo Flores Ribeiro
<paulo.flores.mail using gmail.com> wrote:
>
> I'm trying to plot a raster where pixels can only assume integer values
> 1, 2 or 3, identifying 3 land use classes. The map does fine when
> plotted with the base r function: plot(rastername). However, I would
> like to use mapview (or another package for interactive maps) but it
> creates pixels with non-integer values on transition boundaries between
> classes (eg between classes 1 and 2 it creates a transition zone with
> some pixels assuming non-integer values 1.2033, 1.4221, 1.7119, etc.).
> Any way to avoid this? Thanks in advance, PauloFR
>
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