Post on 27-Jan-2015
description
Geomatics LaboratoryComo Campus
Participatory GIS: experimentations for a social 3D virtual globe
Maria Antonia Brovelli, Marco Minghini, Giorgio Zamboni
Politecnico di Milano, DICA – Geomatics Laboratory at Como Campus
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➔ software allowing to explore the Earth in three dimensions while streaming satellite imagery, elevation and other data from the Internet
➔ user freedom to move around the globe and interact with it➔ multi-disciplinary, multi-resolution and multi-dimensional (even 4D) ➔ context capability, ease of use, realistic user experience➔ growing popularity due to increased Internet availability of geospatial data
(e.g. aerial and satellite imagery, topographic maps and DTMs)
✔ Virtual globes
Virtual globes
Geomatics Laboratory, Politecnico di Milano – Como Campus
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✔ Many of them are available
Virtual globes
Geomatics Laboratory, Politecnico di Milano – Como Campus
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✔ Many of them are available
Virtual globes
Geomatics Laboratory, Politecnico di Milano – Como Campus
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➔ http://goworldwind.org➔ free and open source under NASA Open Source Agreement (NOSA) license➔ Java Software Development Kit (SDK) ➔ multi-platform (Java: “Write once, run anywhere”)➔ 3D Web visualization as Java Application, Java Applet or Java Web Start
Application➔ based on open standards, accommodates any desired data format
✔ NASA's virtual globe
NASA World Wind
➔ accuracy control of horizontal (texture) and vertical (DTM) components➔ upload layers from OGC-compliant WMS servers➔ default WMS layers (i.e. satellite imagery and DTMs) from NASA and USGS➔ 2D objects (e.g. lines and polygons) and 3D objects (e.g. parallelepipeds and
spheres) can be placed on the globe or in its surroundings
✔ Main features
Geomatics Laboratory, Politecnico di Milano – Como Campus
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➔ born to promote tourism and cultural heritage➔ interaction with user mobile devices for uploading Points Of interest (POIs)➔ POIs three-dimensional visualization on World Wind virtual globe➔ user collaborative contribution in POIs characterization➔ creating, saving and sharing customized maps with the community
✔ PoliCrowd is a Web-based 3D Participatory GIS application
PoliCrowd
Geomatics Laboratory, Politecnico di Milano – Como Campus
http://geomobile.como.polimi.it/policrowd
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PoliCrowd architecture
SERVER CLIENT
template form
compiled form
WMS
AGGREGATE COLLECT
Geomatics Laboratory, Politecnico di Milano – Como Campus
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Field-data collection COLLECT
✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
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✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
Field-data collection COLLECT
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✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
Field-data collection COLLECT
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✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
Field-data collection COLLECT
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✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
Field-data collection COLLECT
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✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
Field-data collection COLLECT
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✔ Guided form compilation
Geomatics Laboratory, Politecnico di Milano – Como Campus
Field-data collection COLLECT
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PoliCrowd architecture
SERVER CLIENT
server
WMS / KML
WM
S
WW
W
JAVA Web Start
JSP / SERVLETS
Geomatics Laboratory, Politecnico di Milano – Como Campus
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3D data visualization
➔ 3 Levels Of Detail according to the altitude of the point of view on the globe
✔ Points Of Interest (POIs) 3D visualization on top of World Wind
✔
✔ first LOD: representation of all the POIs with a common icon (i.e. a pin)
Geomatics Laboratory, Politecnico di Milano – Como Campus
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➔ 3 Levels Of Detail according to the altitude of the point of view on the globe
✔ Points Of Interest (POIs) 3D visualization on top of World Wind
✔
✔ second LOD: representation of POIs with icons showing their category
Geomatics Laboratory, Politecnico di Milano – Como Campus
3D data visualization
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➔ 3 Levels Of Detail according to the altitude of the point of view on the globe
✔ Points Of Interest (POIs) 3D visualization on top of World Wind
✔
✔ third LOD: representation of POIs with icons showing their classification
Geomatics Laboratory, Politecnico di Milano – Como Campus
3D data visualization
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➔ clickable POIs placemarks➔ visualization of Android ODK Collect-reported information in a balloon
✔ Querying Points Of Interest
Geomatics Laboratory, Politecnico di Milano – Como Campus
3D data visualization
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✔ View page for non registered users
User interaction with POIs
Geomatics Laboratory, Politecnico di Milano – Como Campus
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✔ View page for registered users
Geomatics Laboratory, Politecnico di Milano – Como Campus
User interaction with POIs
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✔ Add/edit comments and multimedia contents (registered users only)
Geomatics Laboratory, Politecnico di Milano – Como Campus
User interaction with POIs
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Adding WMS layers
✔ Adding layers from available WMS servers➔ users have to enter a valid WMS server URL and then select from the list the
desired layer(s)➔ all the WMS layers added to a PoliCrowd projec feed a catalogue available
for the whole community
Geomatics Laboratory, Politecnico di Milano – Como Campus
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Creating/saving projects
✔ Creation of a new PoliCrowd project➔ registered users can create a new project, entering a name and a description
✔ Saving a PoliCrowd project➔ storage of the current layers, the position (i.e. latitude, longitude and
altitude) and the camera orientation of the point of view over the globe
✔ Visualization of user-created projects
➔ all the created project feed a catalogue available for the whole community➔ the catalogue keeps trace of the project owner
➔ all users can visualize PoliCrowd projects➔ project owners have also editing options available
Geomatics Laboratory, Politecnico di Milano – Como Campus
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Projects catalogue
✔ Visualization of user-created projects
Geomatics Laboratory, Politecnico di Milano – Como Campus
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NASA World Wind Europe Challenge
✔ Second NASA World Wind Europe Challenge in 2014 (1st edition in 2013)➔ http://eurochallenge.como.polimi.it
Geomatics Laboratory, Politecnico di Milano – Como Campus
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Contacts
Thanks for your attention!
Politecnico di MilanoLaboratorio di Geomatica - Polo Territoriale di Como
Via Valleggio 11, 22100 Como (Italy)
marco.minghini@polimi.it
Marco Minghini
Geomatics Laboratory, Politecnico di Milano – Como Campus