Digital Geography

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…

short announcement: learn to map with cartoDB

Dear folks, most of you probably know how to map things using software on your pc. Some of you might also know cartoDB. We like their service as our job-page here on is based on their tables, API and GeoJSON export functionalities. Additionally it’s for free (with some limitations)… The guys from CartoDB now offer an online learning event which will give newbies the chance to map their data in a very interesting online mapping engine.

“Top 100 Geospatial Influencers”: a critical map view

A short time of my day I am watching twitter like others are zapping the TV. A short time ago, there was this list out of nowhere: “the 100 most influencial geospatial people” which was published by OPENGEO. Is it a cultural thing, is the GIS business more developed in the US? So many questions when looking on the map that I’ve made wit the data provided by OPENGEO: SO what about all the people given so much input to QGIS, the spanish guys and so on? I mean the influences are not only coming from selling GIS, right? How…

how to create clustered points in leaflet

The leaflet API is very simple and tries to deliver best performance and style for commonly used features like tilelayers, points and lines and markers in general. So when we would like to visualize points it is possible to have a very large numbers of points. So lets have a look on such an basic example. I’ve created a point shape file with QGIS which has approx. 1.000 points embedded. Let’s have a look on a normal webmap with this density of information: As you can see, we’ve inlcuded a second js file with the point information called points_rand.js. You…

QGIS Tutorial II: from data to map – preparing data visualisation

In this tutorial I would like to show you, how to create a topographic map and analyse topographical data using freely available SRTM data and QGIS including some data manipulation. This is part one explaining how to get data, remove missing values, explore the relief and changing the color representation of a TIF file obtained by the USGS.

short announce: the new google maps – a comparison

The new google maps is now in sort of a Beta and availbale on invitation. Let me share some of the new features with you: As you can see, you will have much more space available to see pictures on the map. What I like most is the very reduced implementation of search results as they are shwon in the lower part of the map and you will not have thes ugly markers scattered all over the map anymore: But let’s go a little further and have a look on the routing engine: In the new google maps engine you…

Youtube trends map: play Big Brother in the US

As I have seen today on engadget Youtube presents now a new Trend Map where you can see what viewers in the US like to see on Youtube. At the moment it seems to be the True Blood Trailer for Season 6. But the more interesting part is the analysis of metadata of the viewers: you can select different sexes, age groups and cities. Furthermore you can easily see, that older people tend to have a more diversified watching habbit.