Digital Geography

PostgreSQL and PostGIS: A brief introduction

You probably seen this already (maybe on your very own PC as well): A folder with shape files. Well we’re living in the 21st century and I do have and use those folders still. After a talk of Sebastian Meier at Maptime Berlin I was convinced and started to work with a databases instead of folders. So let me show you how to install PostgreSQL along with PostGIS on Ubuntu and Windows, how to get data into it, import OSM data and how to connect it with QGIS/ArcGIS.

Overview: Newest developments from ESRI

At this years 11th geoforum of central Germany ESRI showed some new developments in their ArcGIS online portfolio. Those were published 23rd of September. Let me please introduce you to some of these features. If you came across the website of ESRI you might have mentioned that current ArcGIS offline or desktop applications are beyond the functional possibilities of the new ArcGIS online framework. One of these was the new multi-directional shadow algorithm which came on stage on the ArcGIS online platform and is now a downloadable function. Of course they will be available with the upcoming ArcGIS pro but…

QGIS plugins: SEXTANTE

SEXTANTE by Victor Olaya is a powerful plugin that bundles many methods and applications from QGIS in one place and provides a GUI for your processing work flow which is comparable with the ArcGIS ModelBuilder or the ERDAS Spatial Modeler. With this plugin it is very easy to use your GRASS, SAGA and GDAL tools, self-written R scripts and many more. This makes spatial analysis much easier and increases reproducibility. Especially the combination with R functions provides a completely new dimension of working with a GIS as nearly everything spatially can be converted to a data.frame and be consumed by…

ArcGIS tutorial 2: the ModelBuilder

ArcGIS is a geographic-information-system (GIS) developed by ESRI. Being widely used and the sheer amount of functions and add-ons are maybe the important causes for being a big-player at universities as well. Therefore we will present you some basic tutorials for learning and enjoying ArcGIS: Tutorial 1: ArcGIS tutorial 1: how to georeference a map?! Tutorial 2: the ModelBuilder objective Create a model with the ModelBuilder to automate different workflows in ArcGIS. Therefore we will connect input-data with different tools in a model diagram. what do you need ArcGIS 9 or 10 time effort depends on model complexity. minimal 10mins