By: Jumadi
description
Transcript of By: Jumadi
By: Jumadi
Presentation Outline Introduction Problems Objectives Research Area System Development Processes Mapping Environment Database Development Decision Making Processes Case Study Conclusions
Introduction The eruption of Merapi Volcano in 2010
released ± 130 milion3 material (Magelang
Local Government and UN-OCHA, 2011). The material was deposited on the upslope
of Merapi. During rainy sesion of 2011 about 1/3
(BPPTK , 2011) of the material caused damaging of numbers of setlements, bridges, roads and agricultural lands.
The rest is predicted will be potential threath during rainy season until 4 year (BPPTK , 2011).
Problems Several institution in 4 municipality and
2 province involved to manage the disaster in collaborative work.
Spatial information is needed to support decision making proceses.
Unfortunately, in some cases each institution has different priority and prefference.
At the same time, it is lack of spatial data sharing among institution.
Proposed Solution Widely accesible spatial information
system (Web-based) Support democratic decision making. Fullfil users requirements from various
institution with different administrative area.
Objective To develop prototype of web-based
spatial information system for collaborative lahars disaster management.
Reserach AreaMerapi
Nr District Area of Damaged Road (m2)1 Cangkringan 202,500.00 2 Donokerto 1,535.00 3 Ngemplak 2,100.00 4 Pakem 137,129.00 5 Tempel 106,400.00 6 Turi 89,929.00 7 Wonokerto 160.00
Grand Total 539,753.00
Nr District Number of Damaged Bridges1 Cangkringan 32 Ngalik 23 Pakem 34 Turi 1
Grand Total 9
Source: BBWS Serayu Opak, 2011
Infrastructure damages from the previous lahars events
Example of Lahars Disaster Events in 2011
Source: www.antaranews.com Source: http://wwwabbee-keren.blogspot.com/
Development Processes Spatial Multi-
criteria Decision Analysis is used
Mapping Environment Hexagonal grid as surface model of the
area was created. The spatial data is stored into geometry
field in PostgreSQL/PostGIS.
Infrastructures Data Infrastructures is stored using different
geographic model.
Nr Object Geographic
Model
1 Road network line
2 Irigation Network line
3 Building polygon
4 Bridges point
Storing the Criterion Map
Weighting method and Decision Rule
Rating Method (Malczewski, 1999) for the criterion weighting based on the users’ preferences.
Simple Additive Weighting Method (Malczewski, 1999). The model was implemented in the
spatial query analysis in PostGIS.
Single User Decision Making Procedure
Collaborative Decision Making
User Preference Input
User Preference Input
User Preference Input
Statistical Analysis
Running The Decision Rule
Result
Case StudyTemporary housing site selection Criteria Map Used:
•Slope Map •Landuse Map •Proximity to Population
•Proximity to local road network •Constraint 1 (hazard Map) •Constraint 2 (conservation Map)
Criteria Weigting Input
•Normalized weighting result.
•User Preference Input of the Criterion Importance Level
•Statistical Analysis of the decision result.
Example of The Result
Making the Result Interoperable using Web Feature Service (WFS)http://localhost:91/lahars-sdss/wfs/index.php?
CA=0.359712230216_0.280575539568_0.169064748201_0.190647482014&C1=0.328719723183_0.256055363322_0.200692041522_0.141868512111_0.0726643598616_0&C2=0.292418772563_0.0938628158845_0.223826714801_0.162454873646_0_0.227436823105&C3=0.699300699301_0.300699300699_0&C4=0.694444444444_0.305555555556_0&CT=0.328719723183_0.256055363322_0.200692041522_0.141868512111_0.0726643598616_0
•WFS link generation
•WFS link
•Accessing the WFS link using Quantum GIS
Conclusions Spatial data is important on collaborative
disaster management, mainly in data communication and decision making processes.
Collaborative decision making through spatial information involve various users with various understanding and skill GIS, so that, the application interface should be as simple as possible.
Data sharing is important.
Thank You
This paper was writen based on MSc ResearchDouble Degree MSc Programme
Geoinformation for Spatial Planning and Risk Management ITC, Univ. Of Twente, The Netherlands - UGM