Digital Geography

GPX overview: An R function to create an overview of your .gpx files (using leaflet and RgoogleMaps)

Why GPX? For what? It's convenient to record tracks of your hiking/field trips with the GPS of your smartphone, tablet or just GPS as .gpx files. You can use them to georeference your pictures (for example with the great georefencer of Digikam) or use them for any kind of mapping purpose. I'm mainly using Maverick (and sometimes the Offline Logger ) to do that, Maverick creates files named with the form "2015-08-26 @ 11-31-59.gpx", therefore I'm quickly collecting a large amount of such files.

Pros and Cons of using Smartphone as a GPS Tool

In a statistical report entitled US Smartphone Use in 2015, it revealed that some 88 percent of American smartphone owners use their handset as a map or navigation device. There are various ways on how you can utilize your handset as a GPS device, either through its built-in map features or via other downloadable applications. If you are one of those planning to maximize their smartphone as a GPS locator, here are the pros and cons of using your handset as a digital geographical tool.

Google Earth Pro is now for free!

Google recently made an announcement that left me very happy: Google Earth Pro, the enhanced version of the world’s most popular digital globe, is now available for free. The software comes with some additional features compared to classical GoogleEarth and used to be $400 per year – actually many users paid because the benefit was huge. Now all you have to do is to register, get a free key, and download the software. If registration doesn’t work for you, don’t worry and don’t give up. It didn’t work for me when I tried first, the next day I tried again…

Macro-Based SE-GPS

When you’re in the field you want to collect as much data as possible using all the expensive and heavy equipment you brought with. For instance, geophysical profiling (e.g. ERT, electrical resistivity tomography; GPR, ground-penetrating radar) provides high-resolution images of the shallow subsurface. Often conspicuous geometries are evidences for changes in the subsurface.

Using OpenStreetMap on your GARMIN

Since most people working with digital-data they are always interested in obtaining their own data using a Global Positioning System (GPS). Therefore I’ll give a short introduction for all of you, using a GARMIN device and like to have a free background map on the screens. There’ll be also the possibility to make routings to certain addresses or Points of Interest. Although the OpenStreetMap Wiki gives some explanations and tipps on bringing OSM to your device, there are some easier ways to do so. But first we have to clarify the question if your device can handle with OpenStreetMap-data: The following devices…

GPS Visualizer – a great online tool for GPS, GoogleMaps and GoogleEarth issues

I looked for a program to draw circles of a pre-defined radius around some points on earth I had the coordinates from. A quick search returned the website GPS Visualizer, and I absolutely love it! It is not only a great free website to convert GPS data in formats that can be used in GoogleMaps, GoogleEarth, jpgs and many other formats, it also allows you to customize maps very easily. Plus, you can use a large number of different maps as base data layer. It looks like the site has been created to deal with tracks and waypoint data, but…

Vehicle tracking now also available for the trains of the German DB

I have to admit that I don’t know since when the Zugradar (train radar) of the Deutsche Bahn (DB) is online, but I found it per accident and I think it’s fun to play around with it. The DB commonly has a bad reputation because of the many delays, so here you can now see how many trains are actually moving and how fast they (sometimes) are. It’s possible to display long-distance trains (IC and ICE) as well as regional trains. Check out the high-speed train from Frankfurt Airport to Cologne, which goes with 300 km/h over almost the entire…

Maps for our robots

I have often wondered what could be the purpose of these mapping 3D models more and more accurate for major cities of the world (eg, Monaco, Geneva or Dubai). The level of detail provided by the standard City GML even imagine the level of detail taking into account the interior (Level Of Details-LOD4) architecture, street furniture, and even the vegetation with its growth and seasonal aspects . Applications in architecture and urban planning are obvious, but beyond … These models increasingly geographically and geometrically accurate (absolute GPS positioning errors of the edges and vertices of the order of 5 to 10cm…