3.3 Importing raster data with terra

3.3 Importing raster data with `terra`

For this chapter, you will need the following R Packages:

## terra version 1.0.10

## 
## Attaching package: 'arc2r'

## The following object is masked _by_ '.GlobalEnv':
## 
##     swissAlti3D

With the terra package, data is imported using the function rast.

library(terra)

swissalti3d <- terra::rast("sample_data/SWISSALTI3D_10_TIFF_CHLV95_LN02_2600_1196.tif")

Just like before, calling the object in our console will give us the class name and some meta information on the dataset.

swissalti3d

## class       : SpatRaster 
## dimensions  : 100, 100, 1  (nrow, ncol, nlyr)
## resolution  : 10, 10  (x, y)
## extent      : 2600000, 2601000, 1196000, 1197000  (xmin, xmax, ymin, ymax)
## coord. ref. : +proj=somerc +lat_0=46.9524055555556 +lon_0=7.43958333333333 +k_0=1 +x_0=2600000 +y_0=1200000 +ellps=bessel +towgs84=674.374,15.056,405.346,0,0,0,0 +units=m +no_defs 
## source      : SWISSALTI3D_10_TIFF_CHLV95_LN02_2600_1196.tif 
## name        : SWISSALTI3D_10_TIFF_CHLV95_LN02_2600_1196 
## min value   :                                  623.3814 
## max value   :                                  858.2705

And calling plot on our object visualizes it spatially.

plot(swissalti3d)

//todo add method for rasters with multiple layers