In the previous chapter we have loo

In the previous chapter we have looked at how you can display maps and tables in
ILWIS. Now we will see more in depth how the data are structured. We will treat the
structure of spatial data.
Spatial features are represented in ILWIS in the following ways:
- Points. Many items can be represented as single points on a map. Points may refer
to rainfall stations, houses, field observations, sampling points, etc.
- Lines. Linear features such as roads, drainage lines or contour lines.
- Areas. Features which occupy a certain area, such as land use units (e.g. forest),
geological units, etc.