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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