Integrating LiDAR data into the Integrating LiDAR data into the - PowerPoint PPT Presentation

Integrating LiDAR data into the Integrating LiDAR data into the workflow of cartographic workflow of cartographic representation. representation. OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cartographic Workflow I. 2 3 1 4 5 Vector GPS, Laser Surveying (Nat. GDB) Range Find er Orthophotos & Scanning old Raster data DEM while maps (WMS) Yes/ vectorizing: No ‐ Contour lines Digital ‐ Road & tracks LiDAR ‐ elevation ‐ Vegetation flights models ‐ Cliffs ‐ Others Open Technical data Capture Street (DB, Lists) technical data Map Complete OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cartographic Workflow II. 8 6 9 7 Editing Mobile Course Vectors devices Setting GDB, Routing Topological WMS (OSM) Adjustments Editing Web maps Raster Editing Printing DB OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Orienteering Maps. 8 Years ago: LiDAR data / DEM / Tablets (OCAD 10/11) • Base map: Digital Survey Maps / WMS / LiDAR data  Contour lines  Relief shading  Slope map  Density Maps  Intensity Maps GPS Receiver  Tracks • Surveying: Laser Range Finder Tablet PC OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cartographic Workflow I. O O O - - m - m m a a a p p p s s s 2 3 1 4 5 Vector GPS, Laser Surveying (Nat. GDB) Range Find er O O O - - - m m m a a a p p p s s s Orthophotos & Scanning old Raster data DEM while maps (WMS) Yes/ vectorizing: No ‐ Contour lines O O - m - m a a p Digital p s ‐ Road & tracks s LiDAR ‐ elevation ‐ Vegetation flights models ‐ Cliffs ‐ Others Open Technical data Capture Street (DB, Lists) technical data Map Complete OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cartographic Workflow II. O ‐ maps O ‐ maps O ‐ maps O ‐ maps 8 6 9 7 Editing Mobile Course Vectors devices Setting GDB, Routing Topological WMS (OSM) Adjustments Editing Web maps Raster O ‐ maps Editing Printing DB OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

LiDAR Data. RGB Photo GRID Laser Raw Data Hill Shading DSM ‐ DTM Contour Lines OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Contour Lines. • Individual contour interval. • Problem: Large file of Danish Land  several days Survey with 36 km 2 • Solution: Split into tiles of 1km km 2  6 minutes and merge contour lines afterwards! OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Contour Lines. • Problem: jagged contour lines • Solution: 1 st use Douglas ‐ Peucker Algorithm and 2 nd change into Bèzier Curve. OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Contour Lines. • Problem: differentiate depressions from hills • Solution: Combine with hill shading picture OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Hill Shading. • Open hill shading as background map and vectorize the shape of terrain, like ‐ trail and track network ‐ ditches and depressions ‐ hills • The quality of the hill shading can differ due to the quality of the resolution. • Experienced user can detect vegetation boundaries as well. OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Contour Line vs. Hill Shading OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Orthophoto. • Open georeferenced orthophotos as a background map and vectorize vegetation edges. • Quality can differ a lot, due to the date of the shot. • Restriction due to shadow and stage of vegetation OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Vegetation Height Maps. • Calculate difference from Digital Surface Model (DSM) and Digital Terrain Model (DTM)  Classify the differences. • More distinct than orthophotos OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Vegetation Height Maps. Orthophotos vs. Vegetations Heights Maps (DSM minus DTM) OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Vegetation Height Maps. Orthophotos vs. Vegetation Heights Maps (DSM minus DTM) Illustration: B. Imhof, OCAD AG OCAD AG U. Steiner Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cliffs • Calculate slope map  Classify all slopes (pixels) more than 45° OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Is this workflow useful only for Is this workflow useful only for orienteering maps? ? orienteering maps OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Data of Official Survey in Switzerland. 11 Thematic Layers Survey marks Ground cover Single objects Heights (DEM) Contour lines and hill Contour lines and hill Nomenclature shading are missing! shading are missing! Properties Piping Boundaries Permanent erosion and mudflow Address of houses Administrative boundaries Toilets for dogs Source : www.cadastre.ch OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Survey Map 1:10’000. Individual visualization With relief shading and toilets Raw data (DXF) for dogs OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cartographic Workflow I. O O O - - m - m m a a a p p p s s s 2 3 1 4 5 Vector GPS, Laser Surveying (Nat. GDB) Range Find er O O O - - - m m m a a a p p p s s s Orthophotos & Scanning old Raster data DEM while maps (WMS) Yes/ vectorizing: No ‐ Contour lines O O - m - m a a p Digital p s ‐ Road & tracks s elevation LiDAR flights ‐ Vegetation models ‐ Cliffs Survey Survey Survey ‐ Others Maps Maps Maps Open Technical data Capture Street (DB, Lists) technical data Map Complete OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Cartographic Workflow II. Survey Survey Survey Survey Maps O ‐ maps O ‐ maps Maps Maps O ‐ maps Maps 8 6 9 7 Editing Mobile Course Vectors devices Setting Survey Survey Survey Maps Maps Maps GDB, Routing Topological WMS (OSM) Adjustments Survey Maps Editing Web maps Raster Survey Maps O ‐ maps Editing Printing DB OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Conclusion. Laser Airborne Scanning has revolutionized orienteering maps very much: Products: ‐ Contour lines ‐ Hill shading ‐ Cliffs ‐ Vegetation Height Maps This manner to complete maps is not only practicable for orienteering maps, it is suitable also for other topographic maps. OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013

Thank you for your attention! Thank you for your attention! OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a cartographic workflow, ICC Dresden 2013