dušan petrovič faculty of civil and geodetic engineering university of ljubljana slovenia email:...
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Dušan Petrovič
Faculty of Civil and Geodetic EngineeringUniversity of Ljubljana
Sloveniaemail: [email protected]
Some experiences in making Orienteering maps in Slovenia
from airborne laser scanning data
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Motivation:
Orienteering maps are thematic maps with very detailed content (fully standardised)
production is due to extreme detainees of content very expensive, time consuming and it requires a lot of terrain work made by skilled mapmaker
necessity for many new maps
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Traditional source data:
- Topographic maps
- Aerial images, orthophoto
- GPS survey
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The airborne laser scanning data -promising source data for deriving different topographic data
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Deriving data from ALS:
- automated (urban environment or forestry)
- manual recognition of objects in different derived presentations (eg. hillshading)
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small test areas on different parts of Slovenia representing different types of terrain:
area near Ljubljana: steep continental reliefarea near Domžale: steep carst terrainarea near Lipica (Karst): moderate carst terrain,
first echo
1 2
3
- O-map- ALS hillshading- ALS derived contours
* 0.5 m, 5-15pt/m2
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Maps made using LiDAR data
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Sprint map (ISSOM)DEM 0.5 m50% time
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SKI-O map8 sq.km
DTK5DEM 0.5 m
DSM 5 pt/m2orthophoto 0.5 m
GPS (ratrac, scuter)2 hours field check
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SKI-O map8 sq.km
DTK5DEM 0.5 m
DSM 5 pt/m2orthophoto 0.5 m
GPS (ratrac, scuter)2 hours field check
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DTK5DEM 0.5 m
DSM 10 pt/m2orthophoto 0.1 m
(april)
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MTBO mapDEM 0.5OP 0.1 m
(april) 2 hours(tracks)
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Conclusions
Daniel Lebar: „Don‘t you ever ask me to make an O-map on the area not
covered with LiDAR data!“