```r
hist(dtm)
```

<div class="figure">
<img src="OS_GIS_files/figure-html/unnamed-chunk-5-1.png" alt="Simple histogram of the digital terrain model for Arne. Note the distribution of the elevations. Most of the site lies just a few meters above sea level with a maximum of 52m above sea lavel." width="672" />
<p class="caption">(\#fig:unnamed-chunk-5)Simple histogram of the digital terrain model for Arne. Note the distribution of the elevations. Most of the site lies just a few meters above sea level with a maximum of 52m above sea lavel.</p>
</div>

```r
summary(dtm)
```

```
##              layer
## Min.         0.100
## 1st Qu.      0.998
## Median       4.073
## 3rd Qu.     12.038
## Max.        52.665
## NA's    950690.000
```