Digital Geography

ERDDAP: Diving into a Data Ocean

Data Lakes has become a popular term in the Big Data community. It’s used to refer to a large storage repository and processing engine. However there is now a technology from NOAA (National Oceanic and Atmospheric Administration of the USA) that turns its existing distributed data network of Petabytes of Open Data into what can be described as a Data Ocean! This technology is called ERDDAP and it provides fixed entry points on the Internet from which data can be searched for, queried and transformed. This functionality is made available via a human interface (web site) and Restful Web Services.

Evolving Geographic Information System: OpenWebGIS plans & its crowdfunding campaign

Perhaps you have already used in your work OpenWebGIS or just have seen it or read about it. Due to this system exists since 2014. But we will describe OpenWebGIS briefly. It is an open source online/offline geographic information system for work in web browser or mobile app. Since its foundation, a great number of users have benefited from using this system functions.

Heatmap, JavaScript, Openlayers and canvas

This article is a continuation of the article “Heatmap and Interpolation: it is easy in OpenWebGIS” about creation of Heatmap and Interpolation with the help of OpenWebGIS interface. We are now describing the process of creating a heatmap, based on any point layer, using JavaScript, OpenLayers 2.x and canvas element (as part of HTML5 technology). Describing the process we will expect that you certainly already have some basic knowledge of programming language JavaScript and can handle OpenLayers library (which is an open source provided under the 2-clause BSD License) JavaScript library for displaying map data in web browsers.). Perhaps the…

Spatial Big-Data: 10 stunning services

In the last month the German website Spiegel-Online showed some nice examples of big-data combined with geodata. Geodata get’s more important with every GPS-enabled device that is sold, form that will store your address, IP that is monitored, customer in a global market. Let me Introduce you some stunning examples of geo-enabled web applications. Maybe you get some inspiration to power your business with some spatial data too.

Open Data in the UK

The Ordnance Survey is UK’s mapping agency and frequently releases free datasets. Their OpenData policy is quite progressive compared to Germany’s and they’ve recently published some fresh datasets that anyone can use. All you need to do is to register and to acknowledge them. The new datasets are: OS Open Map – Local; OS Open Names; OS Open Rivers; and OS Open Roads. They include data on urban and rural features, an index for all the location names in the UK, a generalised open water network, UK’s connected road network and much more. All this adds up to their existing…

geo.admin.ch: bringing Swiss geodata potential to life

A priorized project of eGovernment Switzerland Usage and exchange of geodata is fostered by geo.admin.ch in a significant way. The Federal geoportal is operated by the Federal Office of Topography, swisstopo, on behalf of the coordinating body for Federal geographical information with the aim to implement the Geoinformation Act. The purpose of this Act is to ensure that geodata relating to the territory of the Swiss Confederation is made available to the Federal, Cantonal and municipal authorities, to industry and commerce, to academic and scientific institutions and to society at large, for the broadest possible use, in a sustainable, up-to-date,…

Non-standard use of Web GIS on the example of OpenWebGIS functionality

In this article we consider the use OpenWebGIS, as one of the free Web GISs for analyzing of buildings drawings, as well as mapping and measurement of small-scale objects that are demanded in archeology, architecture, biology, medicine and other fields of human activity. Tell me, how many online Web GISs can use the maximum zooming ratio of more than 19? Those Web GISs which use OpenStreetMap as a base map, generally have a maximum zoom to 19. Those Web GISs which use Google Maps as a base map, can increase to no more than 19-20, but in some cases this…

Top 5 QGIS Plugins

I have been using QGIS 2.2 for most of my GIS work for about 3 months now, so I have noticed that I keep on using some plugins over and over and I really wouldn’t be able live without them. So here is a list of my favorite top 5 QGIS plugins! Top 5 QGIS Plugins 1. OpenLayers plugin It was love at first use for the OpenLayers plugin.  It allows the user to load basemap from a different provides like Google, Bing, Yahoo, OSM (OpenStreetMap), Apple (I have NO idea what someone would want it) and Stamen. Now I…

The Spiegel Magazine and their “maps”

Today I stumbled upon a “map” on Spiegel Online ( an import news page in Germany ) which shows the spied countries of the NSA. As we already know leaflet quite good and also tried other mapping possibilities I was interested in what they are using for this map which is more informative than this useless map. So looking on the source code: It’s a library called jvectormap.

NeoCartography and the need to code

The time when I studied Geography and Mathematics is long ago. So I chose Cartography as one major part of my studies and learned to draw circles and a good cartographic representation of discrete values as an example. As I have chosen this field of cartography and GIS I am well aware of the changes that came to this fields. Especially Cartography made big leaps to be more represented by Geoinformatics than those traditional map makers. And I would assume that it is hard for Geographers and Cartographers to catch up with all those fancy programming stuff. Nevertheless I think…

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…