This week, we explored Triangulated Irregular Networks (TINs) and Digital Elevation Models (DEMs). The TIN is unique in that it allows you to evaluate slope, aspect and elevation in a way that is useful for certain types of landscape analysis and quick retrieval of information regarding these types of information. An example of this is shown in the image below:
A quick click on any triangle and you can get the slope, aspect, and elevation of that area. So they can act as a good quick reference for a landscape. They can also give you a new perspective on landscape and allow you to think about your elevation analysis as it would apply to a DEM as well.
Below, I used a DEM and weighted overlay to give a visual analysis of ski slope suitability. The DEM makes the appearance of elevation data appear more smooth and it better for general map making as it is pleasing on the eye.
Both elevation models are useful and have their place in the toolbox. This week was a good exercise in understanding the tools and methods used in both applications.
No comments:
Post a Comment