Innovative Web-GIS and SSE ServicesUsing EO Satellite Data

Innovative Web-GIS and SSE
ServicesUsing EO Satellite Data
Authors:
Krzysztof Drypczewski, Andrzej Stepnowski, Krzysztof Bruniecki
Department of Geoinformatics
Safe City GIS Overview
Safe City & Coastal Zone GIS
Monitoring the security of the
coastal zone and its inhabitant
●
Critical Infrastructure (CI)
monitoring,
●
Threat discovery.
• The system integrates satellite
images along with digital charts of
coastal areas and threat spatial
analysis.
• Satellite EO data acquisition,
processing and dissemination
platform built around an Open
Source Web GIS
●
Typical footprint of the AVHRR scene received by
the satellite ground station
System architecture
The system consists of:
•
the Web GIS Server, the Web GIS
client, and the set of modules designed
for spatial analysis and data
management.
• The latter include a CI Analysis Module
based on the CARVER2TM technology,
Hazard Scenario Simulation Module,
EO Data Adaptation Module and a
Geodatabase Management Module.
•
Satellite scenes, as well as analysis
results, are stored in the Geodatabase.
• The stored data is further processed by
the Spatial Analysis Module.
• The resulting spatial data is
disseminated to authorised users of the
Web GIS client in the form of thematic
layers by the Web GIS Server
Architecture of the system
1.5m HRPT/MetOp sattelite ground
station
• Satellite ground station operated by the
Department of Geoinformatics, GUT, since 2009.
• Obtaining data (High Resolution Picture
Transmission (HRPT)) from a set of atmosphere
and land monitoring sensors available in NOAAN and MetOp-A/B satellites.
• Station has been upgraded to enable the
MetOp-B (launched on 09.17.2012) data
receiving.
• Further upgrades planed to allow receiving of
imagery from the Chinese FY-3 satellite.
• The station consists of the antenna, localized on
the roof of the WETI Faculty Building and the
indoor part consisting of the receiver and
acquisition-storage-control computer unit.
Ground station (N54° 22' 15.60", E18° 36' 45.48")
Services
The EO applications are utilised twofold in the Safe City-GIS:
• as native services directly implemented and built into the system; they are based on processing the
imagery provided by the 1.5 metre HRPT/MetOp satellite ground station;
• by connection to external services, like SSE, which act as additional data sources, as well as data
processing tools.
EO Data Adaptation Module exchanges data with selected SSE services by fulfilling the role of data
adapter and request processor. The module processes requests from the Web GIS client, translates them
into SSE queries, forwards them to appropriate SSE services, receives the service responses and forwards
them to the Web GIS server in an appropriate format..
Service Support
Environment (SSE)
SSE Platform:
• developed for European Space Agency
(ESA-ESRIN),
• brings Earth Observation (EO) products
and services closer to customers,
• allows data sharing and processing
services using SOA concept,
• allows chaining services into more
complex ones.
Safe City Services
• Services deployed in the
SSE range from data
dissemination to data
processing types.
• The deployed services
available to the SSE user as
shown in figure on the left.
Web-GIS client
Main functionalities of a web-client encompass:
• basic map viewing tools like scrolling, zooming,
panning etc.,
• tools for easy map object information retrieval,
including non-spatial attributes like number of
inhabitants,
• creation of queries for selection of objects using
both spatial and non-spatial criteria,
• execution of the geoprocessing and spatial
analysis procedures,
• customisation of map appearance,
• presentation of data using open standards
(OGC WMS and WFS).
Mobile client
●
●
Implemented as an application assuring the
usage of the WebGIS by users of mobile
devices
allows for usage of the system functions by
mobile users, e.g. for members of civilian
services operating in the field during the
handling of an emergency
Mobile client supports:
• displaying the background map, e.g. from
OpenStreetMap service,
• displaying the layers via the customizable menu,
• providing the user with the information on level
of hazard related to fire and air quality
• switching on/off the visibility of particular layers,
changing the layer order etc.
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Gdańsk University of Technology