Showcase: Line of Sight Analysis

15/03/2024

A viewshed, also called a line of sight analysis, shows which geographical areas are visible from specific points. Featured here is Simonsberg. Although not as…

Planet Picture: Namib-Naukluft, Namibia

28/02/2024

You might be wondering what you're looking at. Well, it's just an aerial view of the tallest sand dunes in the world! The coastal winds…

Showcase: Triangulated Irregular Network (TIN)

14/12/2023

A Triangulated Irregular Network (TIN) is a an approximation of the land surface which is represented by a set of non-overlapping triangles and provides a…

Definition: Hydrology and Hydraulics

29/11/2023

Hydrology is the study of the distribution and movement of water on the Earth's surface and in the subsurface. Hydrologists use mathematical models to simulate…

Planet Picture: Zagros Mountains

22/11/2023

The patterns and colours in the Zagros Mountains (Iran) make for an interesting and unique landscape, as we can see in this infrared view. There…

Five Ways to Depict Elevation

10/11/2023

A digital elevation model (DEM) is merely an image where each pixel represents the average height above mean sea level for the area that it…

We Value Information

01/11/2023

Providing information and data might be a trendy thing to do these days, but for us it's more than that. Providing the information we have…

Showcase: Flow Network

30/10/2023

Curious about how the natural flow of water is determined? It's all about the terrain! The terrain, or topography, of an area plays a crucial…

Comparison: Height Above Nearest Drainage (HAND) vs Flood Hazard Index (FHI)

27/09/2023

Derivatives of digital elevation models are ideal for identifying flood-prone areas. For instance, the height above nearest drainage (HAND) derivative shows the height difference between…

Comparison: Curvature Plan vs Curvature Profile

23/08/2023

Curvature derived from digital elevation models (DEMs) is a measure of the shape of the Earth's surface. It can be used to identify areas that…