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21:58 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2014
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Spatio-temporal data visualization in GRASS GIS: desktop and web solutions

GRASS GIS, a free and open source geographic information system, provides the functionality to manage, analyze and visualize geospatial data. Recently, support for managing the temporal dimension has been integrated into GRASS GIS as a response to an increasing accessibility and importance of spatio-temporal data. However, to fully benefit from such data new capabilities for exploratory visualizations are needed. We present a set of tools for spatio-temporal data visualization which reflects data complexity and also supports online sharing. The GRASS GIS Animation Tool is a desktop application working directly with different types of spatio-temporal data stored in GRASS GIS. We can display synchronized animations of raster, vector and 3D raster data in two- and three-dimensional views. To share spatio-temporal visualizations online, we have developed web map applications which enable users to explore the data as animations or derive supporting information such as histograms. Our solution does not require any server-site application and enables a file-based offline sharing and an easy online publication without any special requirements on users' software or servers. We demonstrate the desktop and online tools on several use cases, namely solar radiation and fire spread modeling, volumetric soil moisture analysis, and cumulative cost surface visualization.
  • Published: 2014
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
29:14 FOSS4G, Open Source Geospatial Foundation (OSGeo) English 2014
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GIS-based modeling with tangible interaction

We present advances in the development of TanGeoMS, tangible geospatial modeling and visualization system. By coupling a physical three-dimensional landscape model, Kinect scanner, projector, and open source GIS software suite GRASS GIS, we created an intuitive tangible interface for dynamic modeling of real-world processes in response to different terrain data inputs. How does it work? You modify the flexible physical model by hands while it is being scanned, imported and processed in GRASS GIS. After computing a desired geospatial analysis or dynamic simulation, the results are projected back on the physical model providing you with instant feedback.With TanGeoMS we can explore how dune breaches affect coastal flooding, how the spread of fire is influenced by location of firebreaks or what is the effectiveness of various landscape designs for controlling runoff and erosion. We can add buildings and assess the distribution of solar radiation for different building sizes and locations or explore impacts of built structures and trees on line of sight and viewsheds. We will cover new 3D manufacturing technologies and materials we use to create precise physical models and discuss various options for single user and collaborative system designs. Whether you are involved in environmental modeling, decision-making, education or you are just curious, you will find this talk inspiring for your own projects.
  • Published: 2014
  • Publisher: FOSS4G, Open Source Geospatial Foundation (OSGeo)
  • Language: English
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