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Faatasi Malologa, Dolores LeneuotiLands & Survey Dept – Tuvalu

Andrick Lal & TeamGeodetic Unit - SPC

Faatasi Malologa, Dolores LeneuotiLands & Survey Dept – Tuvalu

Andrick Lal & TeamGeodetic Unit - SPC

29th November, 2016

Outline

BackgroundProcesses & Initiatives Moving Forward

Conclusion

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Tuvalu Islands

• Land - 26 sq km

• EEZ - 900,000 sq km

• Population – 10,000

• Capital – 6,000

Tuvalu Land Information System

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Tuvalu National Strategy for Sustainable Development 2016 to 2020

Tuvalu - UN Resolution A69/L.53

Align to Global Geodetic Reference System that underpins fundamental geospatial systems and surveying applications

‘ONE’ international reference system

Survey infrastructure

Spatial data infrastructure & Information

Capacity development

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Institutional Arrangements - Tuvalu Geodetic Reference Frame(TVGRF)

Topographic Maps of Tuvalu

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TV Hydrographic Charts

TV Hydrographic Charts

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Tuvalu Satellite Images

IKONOS QUICKBIRD

Tuvalu Cadastral Maps – 1980

All islands surveyed & mapped

Cadastre Legislated 2005

TV Local Grids: WGS72

All data scanned, digitized

Stored as Raster & Vector in TUVLIS

Need to display data over satellite backdrop; more realistic

Upgrade of TVGRF to WGS84

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Cadastre in TUVLIS

TUVLIS Infrastructure

► Mapserver in Govt Server ► Access by Department of Lands & Survey

only► Database: Display of TUVLIS Data► Data: Island Data (Digital)

- Aerial photos, Bathymetry, Cadastre,Topo.

- Geo- reference maps on Local Grids

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Geodetic Infrastructure - Tuvalu

ftp://ftp.ga.gov.au/geodesy-outgoing/gnss/data/ http://auscors.ga.gov.au/status/http://www.ga.gov.au/scientific-topics/positioning-navigation/geodesy/gnss-networks

PSLMP Monitoring Surveys - Tuvalu

• 1 x permanent tide gauge, measuring local sea level• 1 x Constant GNSS station, measuring local earth movement in an

absolute coordinate system• Regular levelling survey between the tide gauge and CGNSS station

allow absolute determination of the vertical height of the tide gauges that measure sea level

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Cadastre and Satellite Imagery

Shift in local grid & WGS84

Cadastre and Satellite Imagery

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TV Local Grid System to WGS84 (Shift)

Vaitupu

Spheroid: InternationalProjection: Transverse MercatorGrid: Vaitupu Local GridSemi Major Axis (a): 6378388.00Eccentricity (e2): 0.00672267002Scale Factor: 1.00Reciprocal of Flattening (1/f): 297.000Latitude of Origin: 0°00' (Equator)Longitude of Central Meridian:178° 41' 00.0000" EFalse Easting: 10,000.00mFalse Northing: 1,000,000.00mDatum: Vaitupu∆X = +193m∆Y = +61m∆Z = +201m

Nukufetau

Spheroid: InternationalProjection: Transverse MercatorGrid: Nukufetau Local GridSemi Major Axis (a): 6378388.00Eccentricity (e2): 0.00672267002Scale Factor: 1.00Reciprocal of Flattening (1/f): 297.000Latitude of Origin: 0°00' (Equator)Longitude of Central Meridian:178° 22' 00.0000" EFalse Easting: 40,000.00mFalse Northing: 6,000,000.00mDatum: Nukufetau∆X = +200m ∆Y = -83m ∆Z = +96m

http://www.asprs.org/a/resources/grids/12-2001-tuvalu.pdf

Geodetic Surveys of Tuvalu Islands (Phase 1)

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Geodetic Survey Team

Transportation

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Reconnaissance Surveys - TVGRF

Geodetic Control Surveys – Nukufetau

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RTK GNSS Surveys

RTK GNSS Surveys – Boundary Definition

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RTK GNSS Surveys – Reference Image Points

Tide Gauge Installations & Watch

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Geodetic Surveys and Google Earth Imageries

Power of Quality Positioning & Spatial Information

Data Quality(accuracy XYZ mm, image resolution, real- time –Google Earth display)

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Future Initiatives

► Phase 2 – August 2017 Continue TVGRF(Control survey, tide gauge – Vertical

datum~MSL, satellite/UAV image correction, cadastral survey GNSS)► Upgrade of survey equipment & TUVLIS ► Modernize GRF; Real-time display of cadastre,

and other geospatial data ► Data sharing with other stakeholders

Conlusion

► Political support – National Strategic Plan►Technical support from SPC & other professional

bodies; GA, FIG, UN-GGIM, PGSC on GRF, Geospatial Development & Management

► Partnership & Support from P-GIS/RS User Group► Modernize & upgrade of GRF and geospatial

infrastructure in PICs► Bringing positioning & geospatial technology to

support sustainable developments in PICs in social, economic & environment

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Fakafetai Lasi