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Geoinformatikbüro Dassau GmbH
D - 40237 Düsseldorf
Twice already, developers and users of the open source GIS QGIS met in the Linuxhotel (Villa Vogelsang) in Essen. This is no coincidence, because there is a special atmosphere and a perfect environment, and beyond the QGIS project is supported with special conditions.
All are already looking forward to working together for a few days on QGIS again in the future. The Geoinformatikbüro Dassau is the organizer of this meeting in Essen, who have started 2009 in Hannover.
The FOSSGIS conference changes every year the location and took place in recent years in Münster, Berlin, Dessau and Rapperswil (Switzerland).
The Geoinformatikbüro Dassau already supports the conference as a sponsor for many years and is involved in the organizing team for the smooth running of the workshops.
On a joint booth with the company Sourcepole AG during the past years we presented news about QGIS Enterprise and held workshops and presentations about the software GRASS GIS 7 and QGIS.
Since 2010, takes place every year, the German-speaking QGIS user meeting in Kassel. The event has been organized by Otto Dassau and Dr. Claas Leiner and eV supported by the German FOSSGIS. For this environment out the QGIS User Group Germany eV was founded in the spring of 2015, which is now the official organizer of the meeting.
In recent years more and about 100 users, developers and interested participants have used the opportunity to talk about QGIS. The premises were asked this of the University of Kassel available.
In addition to practical reports and individual experiences workshops are the focus of the event. The program and the presentations held as a PDF you can see on the pages of QGIS User Group Germany at the URL www.qgis.de.
In 2003, the QGIS project was officially launched and the Geoinformatikbüro Dassau has already long been involved in the project.
Since 2007 Otto Dassau is a member of QGIS Project Steering Committee (PSC) and has in this context taken care of the documentation, helped building up the web infrastructure and has maintained and taken care of the organization of QGIS developer meetings.
In 1983 already, the GRASS GIS project sees the light of day. And since the late 90s, Otto Dassau engaged in the software and has already shortly after the founding of the GRASS User-Association (CLA), which was renamed later in the FOSSGIS eV, committed. For Geoinformatikbüro Dassau GRASS GIS is an important component in the implementation of projects. Sören Gebbert has extensive developments in GRASS GIS integrated in recent years, or contributed to it. This includes, for example, the implementation of the GRASS GIS Temporal Framework, the design of the GRASS GIS Python interfaces PyGRASS and programming of many raster and 3D raster modules.
For the company Mull and Partner from Hanover, we have supplemented the existing QGIS plugin "Load Them All" by Germán Carrillo with a bounding box filter and extended the alphanumeric filter to be able to combine regular expressions using && and || in a query.
In consultation with the client the new functionality is going back into the source code of the plugin and therefore will be available to all QGIS users.
A typical example of how to use open source software for yourself and at the same time give something back to the community.
The at this point proposed extension we have developed together with a customer to interactively define and depict a Weibull distribution as a graphics for a mouse postion in the map view on basis of different input parameters.
The plugin is used to better access the quality of a site for the use of wind energy. The Weibull Curve interactively shown for any location can be exported as graphics.
For a customer in Australia we have designed and implemented a GIS infrastructure that is based on QGIS Desktop, QGIS Server and QGIS WebClient.
On the basis of this solution based on QGIS components he is easily able to represent his analyzed and layouted plannings for the provision of irrigation systems through the Internet and to develop it with the respective farmers.
In this context we have extended QGIS WebClient to selectively display the map services from Google Map or Bing satellite data as a background map.
For a planning office in Hamburg, we have performed a GIS-based classification of dune vegetation on the islands of Sylt and Amrum. High-resolution NIR Aerial images provided by the Wadden Sea National Park Schleswig-Holstein.
For this analysis, we used a method that we have developed jointly with our partner nature-consult and successfully used in numerous projects. This involves the combination of remote sensing , GIS analysis and verification on the ground for an efficient and high-quality vegetation detection in large-scale project areas.
Together with the companies C4G and SQW Consulting the Geoinformatikbüro Dassau has carried yout a GIS-based, statistical analysis based on census data for the South West of England. Given more than 100 statistical values from different sources were processed and displayed spatially with QGIS.
Additionally, based on 34 input values a cluster analysis was performed, which reduces the socio-economic situation into 7 basic, regional characteristics.
The results were provided along with the QGIS on a bootable DVD. This makes it possible to start QGIS from the disk to directly access the statistical layers and to analyze them further, if necessary.