habitat classification

8/6/2019 Habitat Classification

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Essential fisheries habitatEssential fisheries habitat

classification in the Lowerclassification in the Lower SongkhramSongkhram

River BasinRiver Basin using Remote Sensing andusing Remote Sensing andGIS techniquesGIS techniques

SeksanSeksan DuangsriDuangsri

UbolratanaUbolratana SuntornratanaSuntornratana

ThihaThihaAnupongAnupong SanitchonSanitchon


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1.Introduction1.Introduction Songkhram River Basin are a famous for fisheriesSongkhram River Basin are a famous for fisheries

production.production.

Department of Fisheries and MRC conduct the riverDepartment of Fisheries and MRC conduct the rivermanagement .management .

Remote sensing can be defined as the scienceRemote sensing can be defined as the sciencetechnology and art of obtaining information abouttechnology and art of obtaining information aboutobjects from a distance.objects from a distance.

Remote sensing help fisheries study throughRemote sensing help fisheries study throughinvestigating spatial distribution of habitats importantinvestigating spatial distribution of habitats important

for fisheries production and management in integrationfor fisheries production and management in integrationwith GIS technology.with GIS technology.


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The Lower Songkhram River Basin

Area StudyThe lower Songkhram River Basin inthe northeastern of Thailand.

Cutting area come from Landsat imageof WRS path 127 and row 48


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2. Objectives2. Objectives

Supporting the Songkhram River FisheriesSupporting the Songkhram River Fisheries

managementmanagement ProgrammeProgramme

Using remote sensing images classifyUsing remote sensing images classify

habitats mappinghabitats mapping


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3.Methodology3.Methodology3.1 Data sources3.1 Data sources

DownloadDownload LandsatLandsat ETM+ images of WRS fromETM+ images of WRS fromMichigan State University atMichigan State University at www.landsat.orgwww.landsat.org

18 March 2003 (dry season)18 March 2003 (dry season)


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Download from Global Land Cover Facility atDownload from Global Land Cover Facility at

http://glcfapp.umiacs.umd.edu:8080/esdi/http://glcfapp.umiacs.umd.edu:8080/esdi/

17 September 2000 (wet season)17 September 2000 (wet season)

6 November 1992 (master image)6 November 1992 (master image)

MethodologyMethodology


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Geo-referencing

Master6Nov1992

Co-registration

software

ERDAS

Wet/dryimages

Wet/dryimages

Wet/dry

images

Topo-map

scale 1:50,000

software

ENVI

Subset transformed images

Each geo-referencing used at least 20

ground control points and resulted in a

total RMSE of less than half a pixel (15

meters)

Wet/dryimages

Transform UTM

3.2 Image Pre-processing


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Remote sensing data

30x30 m28-Sep-04**Landsat 7, ETM+

30x30 m6-Nov-92*Landsat 5, TM13.2 m30x30 m18-Mar-03Landsat 7, ETM +

12.8 m30x30 m17-Sep-00Landsat 7, ETM +

RMSR

(Root Mean Square Error)

Ground

resolution

Acquisition

date

Satellite and sensor

* = Master image used for image-coregistration of all ETM+ images

** = Scan Line Corrector (SLC) off image


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3.3 Habitat type classification

A self-developed habitat classification that was based on field

observations and researchers familiarity with the area

Reference materials: topographic maps (scale 1:50,000) and

Landsat images

Image subsets of Lower Songkram River basin were classified

into ten habitats.

Survey for ground truthing

using : GPS Garmin 60

time : July-August 2006



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Topographic map for GroundTopographic map for Ground truthingtruthing waypointwaypoint

scale 1:50,000Ground truthing Waypoint

July 2006 25 waypoints

August 2006 27 waypoints


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3.4 Processing (Image classification)

Using software ERDAS , ArcView

Both thematic maps produced simple statisticanalysis of area of each habitat type.

Wet/dry

images

Subset transformed images

From Geo-referencing

Data set ground truthing

ERDAS ArcView

Thematic map


Inundated flood map


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4.Outputs4.Outputs

Total 10 different habitatsTotal 10 different habitats Two habitat maps showing major habitats for

fisheries

Inundated Flood Thematic mapInundated Flood Thematic map

Area statistics for each habitat


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Permanent water bodies(main rivers and streams)

Permanent water body (Non-channel type)

Habitats


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Riparian mixed vegetation

Barren land


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Mixed vegetation Inundated flood

Paddy rice flied

Settlement


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Wet and dry season habitats in Lower Songkhram River basin

Wet seasonDry season


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DryDry -- Wet seasonWet season

Inundated Flood Thematic mapInundated Flood Thematic map


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Habitat Area (ha) Percentage Area (ha) Percentage

Permanent water body (river and stream) 5,990 1.71 2,037 0.58

Permanent water body (non-channel type) 11,262 3.22 11,406 3.25

Inundated floods 53,486 15.28 - 0.00

other habitats 279,411 79.79 337,117 96.17

total 350,148 100.00 350,560 100.00

Wet season Dry season

Area statistics for each habitat thematic map


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5.Problem and limitation5.Problem and limitation Low spatial resolutionLow spatial resolution

Cloud cover in some areaCloud cover in some area

Image of September 2004 was not goodImage of September 2004 was not good


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6.Recommendation6.Recommendation

The classified habitat maps are subject to accuracyThe classified habitat maps are subject to accuracyassessment to evaluate the correctness of eachassessment to evaluate the correctness of each

habitat.habitat.

Ground truth data are necessary for classify habitats.Ground truth data are necessary for classify habitats.


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habitat classification

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