Digital Geography

Intergeo 2016 Day One: drones and drones and drones

The first day of the Intergeo 2016 and it was just mind blowing. The last years we saw a small increase in drone technology companies but especially here in Hamburg they seem to be everywhere. So there is the business rolling. About 500 exhibitors are here showing their latest products and services. At least 130 of them are into drone technology. The hottest shit is most likely the drone based laser scanning systems. So drones are getting more powerful, we see more and more fixed wing systems and the 3D laser scanners are getting smaller and smaller every year. I…

Free Sources of Geospatial Raster Data

I’m always looking for good sources of free data, so I thought I would post a few here in case they were useful to others. The sources listed below tend to be larger providers of regional to global level data, however, please post suggestions in the comments if there are other sources you like and think should be added. I had initially planned to include vector data here, but I think that will be another post as this one got quite long. SAR Data Free Synthetic Aperture Radar data can be some of the hardest to find, but it is…

How to make a simple topographic map in ArcGIS 9.3.1. Part 1.

So, we all know how a topographical map looks like. On a topographic map, we see different objects, which are indicated by different symbols. For example, we see the elevation marks, vegetation, settlements and so on. But how to make topographic map itself? It is in this article, you will learn how to make a simple topographic map. All we need is a digital elevation model and ArcGIS (I use ArcGIS 9.3.1). Our map will display terrain and elevation marks (contours). As a digital elevation model I will ASTER GDEM v.2. But there are other digital terrain models, such as…