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Der Freak Show Podcast live on stage Ausgabe FS239 von der Freak Show.
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In close collaboration with UNICEF Uganda and GeoGecko, KCCA spearheaded the development of an online open source portal to provide a visual presentation of key social services available in Kampala. The tool is built on the backbone of four pillars aimed at (i) identifying key partners’ operations and the nature of their engagement in Kampala, (ii) mapping infrastructure points designed to deliver predetermined services (e.g. schools), (iii) summarizing parish level specific socio-economic profiles, and ultimately (iv) offer insight into the lives of young Ugandan adolescent girls accessing such service in Uganda’s capital city. The tool is built with Open Source tools and can therefore easily be adopted to other projects, regions and be implemented in another context. During this presentation we will (i) walk through the portal and explain how it is created, (ii) describe how it is currently used, and most importantly (iii) discuss how it can be improved and adapted to other sectors at scale.
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MapStore is the Open Source product for creating, saving and sharing in a simple and intuitive way maps and mashups created selecting contents from public services like Google Maps and OpenStreetMap or other servers implementing OGC and ISO protocols. Thanks to MapStore the user can mix her own data with data available on the web to create comprehensive maps and share them with anyone (also via social networks). MapStore2 is cross-browser, and mobile ready. MapStore allows the user to: * Manage maps (share, delete, search, create) and users through a front-end Manager. * Create and navigate maps using a powerful and intuitive front end as map Viewer. * Manage the embed-link, marker's injection, routes injection, time series Google Earth like, spatial queries and more. * Interact with one or more Catalog Service for the Web (CSW). You can also use MapStore as a framework to develop your custom WebGis application composing MapStore ReactJS components and components from other libraries (like React Bootstrap), choosing the best mapping library for your purposes. The presentation will give the audience an extensive overview of the MapStore functionalities for the creation of mapping portals.
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The basic idea of the Dynamic Smagorinsky Model (DSM) is the tensor equation that relates the resolved stress terms with the respective Smagorinsky parametrizations. Although there exist for almost 30 years approaches to solve it, they include common practices which are, in my opinion, applied too uncritically. For instance, a stringent derivation of the tensor equation results in an ambiguous formulation involving a divergence operator. A second problem that may cause inconsistencies is the frequently-used extraction of the Smagorinsky parameter from the test filtering. In my presentation, I want to point out some of these issues to obtain a better understanding of the DSM. This may also lead to a reduction of mathematical inconsistencies regarding its solution.
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Im GasLab werden Algorithmen entwickelt, um in Gasnetzwerken Flüsse vorherzusagen und Empfehlungen zur Steuerung von Kompressorstationen zu berechnen. Unser Team besteht aus vier EntwicklerInnen und Admins, die die Tools und Infrastruktur für elf Mathematik-ForscherInnen bereitstellen und betreiben um aus Forschungscode stabile Releases für unseren Industriepartner zu entwickeln. Wir kämpfen mit ständig wechselnden Datenformaten, Dateninhalten, Projektzielen und Deliverables. Die Releaseprozesse sind wegen der Sicherheitsaspekte des Gastransportunternehmens langwierig und erfordern mehrere Test- und Reportphasen. Wir wollen unsere Erfahrungen mit verschiedenen Arbeitsabläufen und Tools teilen: Was hilft Releases stabil zu halten?
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GIS systems and ICT technologies are often at odds with each other for historical reasons. GIS software has developed in niches, predominantly through monolithic and proprietary systems. The growing need to expose geodata on the web, e.g. sparked through open data policies, leaves developers with a range of options. Clients may request server-side solutions such as OGC services such as Web Map Service, Web Feature Service and the likes. These solutions require a map server. Another option for instance is a direct database query that requests relational data through PHP. Since almost all big database management systems are spatially enabled today (Oracle Spatial, MS SQL Server, PostgreSQL/PostGIS, MySQL) there is per se no need to implement a map server at all. A third option is to use web clients’ native data formats such as JSON/GEOJSON. This may either be requested by a REST API, a JSON-capable DB (e.g. MongoDB) or through flat files. Which of these options serves my purposes best? This very much depends on the advantages of each of these choices and what your infrastructure is trying to achieve.
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Es gibt so viele tolle Open-Source-Projekte im FOSS4G-Umfeld, von denen man als FOSSGIS-Besucher eventuell nichts mitbekommt. Entweder kommen die Kernentwickler nicht aus Deutschland oder sie setzen mal ein Jahr aus oder sie mögen einfach nicht vortragen etc.
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Data provenance is a powerful tool for debugging large-scale analytics on batch processing systems. This paper presents Ariadne, a system for capturing and querying provenance from Vertex-Centric graph processing systems. While the size of provenance from map-reduce-style workflows is often a fraction of the input data size, graph algorithms iterate over the input graph many times, producing provenance much larger than the input graph. And though current provenance tracing procedures support explicit debugging scenarios, like crash-culprit determination, developers are increasingly interested in the behavior of analytics when a crash or exception does not occur. To address this challenge, Ariadne offers developers a concise declarative query language to capture and query graph analytics provenance. Exploiting the formal semantics of this datalog-based language, we identify useful query classes that can run while an analytic computes. Experiments with various analytics and real-world datasets show the overhead of online querying is 1.3x over the baseline vs. 8x for the traditional approach. These experiments also illustrate how Ariadne's query language supports execution monitoring and performance optimization for graph analytics.
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Zentrum für politische Schönheit Das Holocaustmahnmal Bornhagen des Zentrums für Politische Schönheit veranlasste den Kaisertreuen Staatsanwalt Martin Zschächner gegen jene Gruppe als "kriminelle Vereinigung" zu ermitteln - bzw: nicht zu ermitteln. Wie kam das Zentrum auf eine Liste mit der Al-Nusra-Front und was macht Zschächner heute? Eine reise in den tiefen rechten Sumpf der Thüringer Justiz.
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  • Video