Company LOGO National Mapping Initiatives in Sri Lanka by S.M.W.Fernando Surveyor General Survey Department of Sri Lanka Surveyor General Survey Department.

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Presentation transcript:

Company LOGO National Mapping Initiatives in Sri Lanka by S.M.W.Fernando Surveyor General Survey Department of Sri Lanka Surveyor General Survey Department of Sri Lanka

Company LOGO Ancient Mapping – Sri Lanka The first map constructing shape of Sri Lanka produced by Greco-Egyptian Astronomer Claudiuis Ptolemy (AD c ) -Represent relatively accurate coordinates of Sri Lanka although size bit exaggerated - Records of place names, natural features and description of the island was consistent

Company LOGO Ancient Mapping – Sri Lanka Map of Claudiuis Ptolemy First Map of Sri Lanka

Company LOGO Traditional Sri Lankan Cartography It reflects the reconstruction of ancient engineering achievements (construction of tanks, canals and dams) with very little of early knowledge of surveying

Company LOGO Traditional Sri Lankan Cartography Amban Ganga valley and Yoda Ela Canal 17 th /18 th century Ancient Irrigation

Company LOGO Traditional Sri Lankan Cartography Mural Painting of a historical temple (18 th -19 th Century) Sacred Landscape

Company LOGO Traditional Sri Lankan Cartography Soragune Devale – 17 th Century Architectural Plan of a building

Company LOGO 16 th - 18 th century maps of the country - Show a great variation in depicting shape of the island - Represent topographic and territorial information

Company LOGO 16 th - 18 th century maps of the country Map from the journal of Joris van Spilbergen(in 1605 )

Company LOGO 16 th - 18 th century maps of the country Map of the Island depicting kingdom of Kandy by Robert Knox in 1681

Company LOGO 16 th - 18 th century maps of the country Langka or Tambraparni (Ceylon) according to Sanscrit, Pali and Sinhalese in 1859

Company LOGO Evolution of systematic Mapping in Sri Lanka Commenced in mid 18 th century after the establishment of the Survey Department in 1800 by a proclamation during the rule of British

Company LOGO Systematic mapping Powers of Surveyor General The Surveyor General has been empowered under the Survey Act No.17 of 2002, Article 2(k) to: receive, store, reproduce and distribute topographic, cadastral and derived maps, remote sensed data, aerial photographs and other surveying and mapping documents

Company LOGO Systematic mapping Control Network - Horizontal - Horizontal control Network was first established by Mr.J.E.Jackson in 1934 with 94 principle control points. - Further revision in 1992 with distance measurements by EDM equipment - In 1999, the entire network was upgraded with GPS observations establishing 10 Base stations and 272 principle control points.

Company LOGO Systematic mapping Control Network - Horizontal 272 Primary controls (Average accuracy 1:790000)

Company LOGO Systematic mapping Control Network - Vertical - Established during Consists of 59 Fundamental Bench marks

Company LOGO Systematic mapping One-Inch to One-Mile Map series -This is the first topographical map series published based on ground surveys from 1897 to1925 at 1:63,360 scale - 72 map sheets to cover entire country

Company LOGO Systematic mapping One-Inch to One-Mile Map

Company LOGO Systematic mapping Topographic Map series 1:50K - New metric topographical map series published to replace One inch series in Compiled mostly using photogrammetric methods (Aerial Photography on 1:40K) and cartographic technologies based on old One inch series

Company LOGO Systematic mapping Topographic Map series 1:50K

Company LOGO Systematic mapping Topographic Map series 1:10K - Compiled using photogrammetric methods and satellite images since % of the area of the country already covered

Company LOGO Systematic mapping Topographic Map series 1:10K

Company LOGO Systematic mapping Digital mapping - In , Satellite technology introduced to the Department - Sophisticated survey equipment and mapping software introduced since 1990

Company LOGO Digital Mapping Products TOPO 50K Dataset Admin (DS Division) Buildings Grid Hydro (Streams, Tanks) Trans (Roads, Railroad) Landuse Places Reserves Terrain ( Contour, Spot Heights) Utility (Power Line) Complete for the entire country

Company LOGO Digital Mapping Products TOPO 10K TILED MAP

Company LOGO Digital Mapping Products Derived DTM from 1:50K Data

Company LOGO Digital Mapping Products LIDAR Data Digital Surface Model – Projection:UTM WGS84- Zone 44 Data available from Puttalam to Arugam Bay LiDAR Acquisition Parameters Horizontal Resolution – 1m Vertical Resolution – 0.3 m

Company LOGO Digital Mapping Products LIDAR DEM Overlayed with Hydro and Transport layers at 1:10K

Company LOGO Digital mapping Map updating using ALOS – PRISM Data: 2.5m resolution

Company LOGO Thanks for attention