March 2007 The Survey Department of Sri Lanka 1

Contribution of

Survey Department of Sri Lankafor

Mitigation of Disasters in Sri Lanka

K.A.U.N.KasthuriDeputy Surveyor General(Information Technology)

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Survey Department of Sri Lanka

National agency for

Surveying & Mapping

Leading organization for map publication

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Functions of the Survey Department

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From 1800- 1897 –ProclamationFrom 1897 – 2002 Survey OrdinanceFrom 04 th October, 2002Enacted* Survey Act No. 17 of 2002

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• To regulate all Land Survey activities in Sri Lanka

To establish & administer the National Geodetic Control Network

•

To specify the standards of accuracy for cadastral, geodetic and topographic surveys

•

To be the principal authority responsible for receiving, storing and exchanging in any form of all spatial data

•

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• To provide land surveying, land information and related services

•To receive, store, reproduce and distribute, topographic, cadastral, and derived maps, remote sensed data, aerial photographs and other Land Survey and Mapping documents

•To ensure the maintenance of high professional standards among persons engaged in land survey activities…………………………………….etc.

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Activities Related To

Disaster Mitigation

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Activities Related to Disaster Mitigation

• Supported various national and international organizations by issuing digital spatial data during last tsunami

• Landslide mapping with NBRO• Issuing Spatial data for other agencies for

their own disaster mitigation programms( Central Env. Authority, Land Use Policy Planning, UDA etc..)

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Activities with the Support of JAXA and AIT1. Caravan Training in 1999 2. Caravan training in 2003 - with the

collaboration of NBRO3. Caravan training - 2005 December

- 2006 June locally*

4. Mini Project - 20055. Mini Project – 2006

Importantly:Survey department is using the experience gained through Caravan Training to train more users in Sri Lanka

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Mini-Project for capacity Development

Survey Dept., NBRO, AIT,JAXA

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Application of Remote Sensing and GIS Technology for Landslide Hazard Risk Mapping in Sri Lanka.

Central Engineering Consultancy Bureau Survey Department

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Study AreaRatnapura DistrictSabaragamuwa Province

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Results: Landslide Susceptibility MapResults: Landslide Susceptibility Map

##

########

#

#

###

##

##

##

#

#

#

## #

#

### ##

##

####

145000

145000

150000

150000

155000

155000

160000

160000

165000

165000

170000

170000

175000

175000

180000

180000

185000

185000

135000 135000

140000 140000

145000 145000

150000 150000N

5 0 5 Kilometers

Landslide SusceptibilityLandslide PointsLegend

NoSusceptibilityLowSusceptibilityModeratelySusceptibilityHighSusceptibilityVeryHigh Susceptibility

#

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Success of the mini projectSuccess of the mini project

• This study proved the vital importance of digital data in the field disaster mitigation

• Enhance the capability of the Survey Department in supporting of GIS & RS technology for this type of projects

• Develop the collaboration with NBRO, the landslide mapping agency of Sri Lanka

• Identify and develop products suitable for disaster management agencies such as NBRO and others

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Identification of Flood Risk Areas by Survey

Department

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• Used all Large Scale Maps• Used Previous Experiences• Identified lands and families in danger • Developed communication systems• Stocked boats and other durable items• Training of villages

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Upper water Shed Management Project

• All Water shed surveyed and demarcated and gazette as protected area

• Soil protection - Rivet

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Sponsored other projects

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Digital Asia Node• Commissioned in November 2006

ObjectivesObjectives• Promoting the use of spatial data for

Disaster Mapping • Communication with other countries in

Asia

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Digital Asia Node database(Collaborated with Global Mapping Project)

• This include the following data in the node server at SD in scale– Land use– Roads– Rivers– Administration boundaries and village

locations– Cities• 1:50,000 data Raster format with general

classification (sample)

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Currently available Database for Sri Lanka- 10k/50kSheet Index- Availability of 10k Data and DataFormat

- Data Layers and attributes

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Future Collaboration Plans for Disaster Mitigation within Sri Lanka

•Develop research network to increasethe access to multi disciplinary data through Web Mapping

•Expect to provide free ALOS Satellite Products during a Disaster with the collaboration of Sentinel Asia Project

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Future Collaboration Requirements

•ALOS-PRISM data for high-resolution Digital Terrain Models for flood sensitive and landslide risk areas•Cheaper satellite data for monitoring purposes (ALOS-AVNIR and PALSAR)•Support for capacity building in satellite data usage and product generation•JAXA’s collaboration in 2008 ACRS

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Survey Department: www.survey_dept.slt.lk