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National Mapping Initiatives in Sri Lanka. by S.M.W.Fernando. Surveyor General Survey Department of Sri Lanka. Ancient Mapping – Sri Lanka. Represent relatively accurate coordinates of Sri Lanka although size bit exaggerated. Records of place names, natural - PowerPoint PPT Presentation
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National Mapping Initiatives in Sri Lanka
National Mapping Initiatives in Sri Lanka
by S.M.W.Fernandoby S.M.W.Fernando
Surveyor GeneralSurvey Department of Sri Lanka
Surveyor GeneralSurvey Department of Sri Lanka
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LOGOAncient Mapping – Sri Lanka Ancient Mapping – Sri Lanka
The first map constructing shape of
Sri Lanka produced by Greco-Egyptian Astronomer Claudiuis Ptolemy
(AD c.90-168)-Represent relatively accurate
coordinates of Sri Lanka although size
bit exaggerated
- Records of place names, natural
features and description of the island
was consistent
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LOGOAncient Mapping – Sri Lanka Ancient Mapping – Sri Lanka Map of Claudiuis Ptolemy
First Map of Sri Lanka
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LOGO Traditional Sri Lankan Cartography
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
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LOGOTraditional Sri Lankan CartographyTraditional Sri Lankan Cartography
Amban Ganga valley and Yoda Ela Canal
17th/18th century
Ancient Irrigation
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LOGOTraditional Sri Lankan CartographyTraditional Sri Lankan Cartography
Mural Painting of a historical temple (18th-19th Century)
Sacred Landscape
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LOGOTraditional Sri Lankan CartographyTraditional Sri Lankan Cartography
Soragune Devale – 17th Century
Architectural Plan of a building
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LOGO 16th - 18th century maps of the country
16th - 18th century maps of the country
- Show a great variation in
depicting shape of the island
- Represent topographic and
territorial information
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LOGO16th - 18th century maps of the
country16th - 18th century maps of the
country
Map from the journal of Joris van Spilbergen(in 1605)
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LOGO16th - 18th century maps of the
country16th - 18th century maps of the
country
Map of the Island depicting kingdom of Kandy by Robert Knox in 1681
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LOGO16th - 18th century maps of the
country16th - 18th century maps of the
country
Langka or Tambraparni (Ceylon) according to Sanscrit, Pali and Sinhalese in 1859
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LOGO Evolution of systematic Mapping in Sri Lanka
Evolution of systematic Mapping in Sri Lanka
Commenced in mid 18th century after the establishment of the Survey Department in 1800 by a proclamation during the rule of British
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LOGOSystematic mappingSystematic mappingPowers 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
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LOGOSystematic mappingSystematic mappingControl 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.
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LOGOSystematic mappingSystematic mappingControl Network - Horizontal
272 Primary controls (Average accuracy 1:790000)
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LOGOSystematic mappingSystematic mappingControl Network - Vertical
- Established during 1924-1928
- Consists of 59 Fundamental Bench marks
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LOGOSystematic mappingSystematic 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
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LOGO Systematic mappingSystematic mappingOne-Inch to One-Mile Map
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LOGOSystematic mappingSystematic mappingTopographic Map series 1:50K
- New metric topographical map series published to replace One inch series in 1977
- Compiled mostly using photogrammetric methods (Aerial Photography on 1:40K) and cartographic technologies based on old One inch series
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LOGOSystematic mappingSystematic mappingTopographic Map series 1:50K
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LOGOSystematic mappingSystematic mappingTopographic Map series 1:10K
- Compiled using photogrammetric methods and satellite images since 1982 - 70% of the area of the country already covered
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LOGOSystematic mappingSystematic mappingTopographic Map series 1:10K
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LOGOSystematic mappingSystematic mappingDigital mapping
- In 1980 -1990, Satellite technology introduced to the Department - Sophisticated survey equipment
and mapping software introduced since 1990
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LOGODigital Mapping ProductsDigital Mapping ProductsTOPO 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
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LOGODigital Mapping ProductsDigital Mapping ProductsTOPO 10K TILED MAP
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LOGODigital Mapping ProductsDigital Mapping ProductsDerived DTM from 1:50K Data
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LOGODigital Mapping ProductsDigital Mapping ProductsLIDAR Data
Digital Surface Model – Projection:UTM WGS84- Zone 44Data available from
Puttalam to Arugam Bay
LiDAR Acquisition ParametersHorizontal Resolution – 1mVertical Resolution – 0.3 m
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LOGODigital Mapping ProductsDigital Mapping ProductsLIDAR DEM
Overlayed with Hydro and Transport layers at 1:10K
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LOGODigital mappingDigital mappingMap updating
using ALOS – PRISM Data: 2.5m resolution
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Thanks for attentionThanks for attention
