D3: My First Webmap
I always watched those stunning examples created with D3 by Mike Bostock, I liked Ralf’s blog posts here and I always thought to myself: get yourself together and…
Tag: example
Python in QGIS and ArcGIS: A Small Example
Often the usage of GIS never touches the world of programming and I think a lot of GIS users today feel fine with using simple tools and try…
geoJSON with QGIS and leaflet: from data to map
The new JSON Format GeoJSON allows you to easily embed geographical features in your leaflet webmap. Additionally you can create it very easily in the open source GIS…
NDVI / SAVI calculation using Landsat scenes: DNs vs reflectance values
In one of my last seminars relating remote sensing techniques I was blamed for calculationg the NDVI and SAVI directly with the ModelMaker in Erdas Imagine using digital…
Possible application for topologies
Most of my students asked me: “why do we need this or that!?”. In fact: for topologies I failed in answering often. One possibility of usage is shown…
projections, ellipsoids/spheroids, coordinate systems, datum and all this crazy cartographic stuff.
We will go straight to the main part of the problem:how to communicate, where you are. Sometimes it is as easy as “one, two, three” but most likely…