1) The document presents an extension of an existing regional Flood Portal in the Liberec Region of the Czech Republic to provide online spatial analysis capabilities. 2) It uses the OGC Web Processing Service (WPS) protocol to communicate between the mapping client and the GRASS GIS server, allowing spatial analysis functions like calculating catchment areas, drainage paths, and flooding or visibility maps. 3) Examples are given of functions added to the portal using GRASS GIS modules, with results exportable in common formats, to provide analytical tools for flood management and planning.

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THE EU-CIP-PROJECT
“BRISEIDE”
ANALYTICAL CAPABILITIES
ON REGIONAL GEOPORTAL
IRENA KOŠKOVÁ
Regional Government, Liberec Region
&
KAREL CHARVÁT
CCSS, Prague

2. MAIN OBJECTIVE
G I 2 0 1 0 D r e s d e n – 10. Sächsisches GIS-Forum
1. The main objective is to present extended
functionality of existing regional Flood Portal -
online available spatial analysis possibilities
2. For the communication between the mapping
application (client) and GRASS GIS, OGC Web
Processing Service protocol was used
(implemented by PyWPS on the server-side).
3. The functionality was made by using GRASS GIS
modules:
r.lake … for flooding r.drain … for runoff
r.water.outlet … for catchement r.los … for visibility

3. FLOOD PORTAL TECHNICAL OUTLINES
WHAT IS WHAT - possibility to create on-line overview maps
and time series
FLOOD PORTAL
G I 2 0 1 0 D r e s d e n – 10. Sächsisches GIS-Forum
1. Flood Portal An -obligatory document for flood commissions forum)
of Liberec Region
shared common work place (discussion
what it isDATAmanagement – BACKGROUND DATASETS Warning
-online alarm messages from Integrated
AND MAPS
maps and dataService by CHMI are accepted (by XML files)
• ZABAGED (Fundamental Base of Geographic arises
The obligation to have prepared Flood Plan
Data) fromonline The Czechservices of Czech Central
1 : -10 – THEMATIC DATASETSfor all level of local
technical outlines
DATA AND MAPS 000, transport Office for
Water Law (254/2001 Sb.) Surveying,
Mapping Transport Information Centre are integrated
profiles status Updated 2009
and Cadastre,
governments.
• Flood warning (income (level A, B, C)traffic closures, traffic
online
FLOOD•PORTALOrtophotomap 20 cm per pixel, had to be ratified by
Water • level Liberec Region Flood Plan Geodis 2006
GENERAL OUTLINES
recorders and road meteorological services for
2. Technologies model of terrain, Geodis of 2004) and had tothe
• Digital accidents basins (in April
Maximum of simplicity for using (simplification 2005
• Drainage areas andRegion Council
Liberec water
region)
control, • Endangered objects boundaries and Mapserv points,
server: PyWPS, Grass GIS, UMNFlood Plan of Czech
reduction Administrative of content,
• of unused part with superior addresses
correspond
client: important -parts…) flood commissions database into central
export
highlighting of HS-RSStatistical Office, 2009 ….
DHTML Mapping client
CzechRepublic (acquired in September 2004)
• Dangerous objects system of Czech Republic Flood Plan
Publicity Civil protection facilities (evacuation (flood
• for obtaining broad base of users facilities,
(by XML file)
is presented to ON-LINEsupply, decontamination services,
all water AVAILABLE AT http://flood.kraj-lbc.cz
portalPyWPS demonstration Liberec Region,
3. emergencymayors of
emergency survival in Region, to set
- RSS-channel was
to all teachers of civil education facilities) all
• Sirens
environment workers from municipalities every year)
Connection into other relevant systems (Czech
Republic Flood Plan, IS of Crisis management…)

4. OGC Web Processing Service
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OGC’s Web Processing Service is defining the way,
geoprocessing operations should be offered over
networks using Web Services.
Can be configured to offer any sort of GIS functionality
to clients across a network.
Data can be stored on the server, sent with the request
or stored on remote servers (WCS, WFS, . . . )
The GIS functionality is referred as process
Scope: To move the geospatial calculations
from client to server

5. PyWPS
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Implementation of OGC Web Processing Service 0.4.0
Only interface between Internet and used programs
GRASS GIS, R, GDAL/OGR, PROJ.4, . . .
Free Software, GNU/GPL.
Supported by Help Service - Remote Sensing
PyWPS has been developed with support of DBU
(Deutsche Bundestifftung Umwelt).
http://pywps.wald.intevation.org

6. PyWPS demo
on Flood Portal of Liberec Region
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1. Spatial analysis - CATCHMENT / BASIN
Calculation of the catchment area for a given point.
To achieve meaningful results it is necessary to enter a
point on Thalweg.
The result is the area from which water flows to the
specified point
The calculated data
can be downloaded
in GeoTIFF format

7. PyWPS demo
on Flood Portal of Liberec Region
G I 2 0 1 0 D r e s d e n – 10. Sächsisches GIS-Forum
2. Spatial analysis - RUNOFF
Calculate fluid drain path from the specified location.
The calculation can be used as a quick graphical
representation of risk in case of leakage flows hazardous
liquids.
The calculated data
can be downloaded
like GML

8. PyWPS demo
on Flood Portal of Liberec Region
G I 2 0 1 0 D r e s d e n – 10. Sächsisches GIS-Forum
3. Spatial analysis - FLOODING
Calculate the area submerged for a given height of water
at a specified point.
The calculated data
can be downloaded
in GeoTIFF format

9. PyWPS demo
on Flood Portal of Liberec Region
G I 2 0 1 0 D r e s d e n – 10. Sächsisches GIS-Forum
4. Spatial analysis - VISIBILITY
Calculation of the visibility analysis.
Result of calculating is the area, visible from the place
the observer stands
The calculated data
can be downloaded
in GeoTIFF format

10. THANK YOU FOR YOUR ATTENTION
G I 2 0 1 0 D r e s d e n – 10. Sächsisches GIS-Forum
Ing. Irena Košková
Regional Authority of Liberec Region, Czech Republic
irena.koskova@kraj-lbc.cz
RNDr. Karel Charvát
Czech Centre for Science and Society, Prague, Czech Republic
charvat@ccss.cz