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

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

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Integrating LiDAR data into the Integrating LiDAR data into the workflow of cartographic workflow of cartographic representation. representation. OCAD AG OCAD AG Mhlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Integrating LiDAR data into a

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

Integrating LiDAR data into the Integrating LiDAR data into the workflow of cartographic workflow of cartographic representation. representation.

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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.

LiDAR‐ flights Scanning old maps Surveying Capture technical data Digital elevation models Raster data (WMS) Vector (Nat. GDB) Technical data (DB, Lists) GPS, Laser Range Finder Open Street Map

1 2 3 4 5

Yes/ No

Orthophotos & DEM while vectorizing: ‐ Contour lines ‐ Road & tracks ‐ Vegetation ‐ Cliffs ‐ Others

Complete

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SLIDE 3

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

Editing Raster Topological Adjustments Editing Vectors Editing DB Web maps GDB, WMS Mobile devices Printing

6 7 8

Course Setting Routing (OSM)

Cartographic Workflow II.

9

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SLIDE 4

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

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

  • Surveying:

GPS Receiver  Tracks Laser Range Finder Tablet PC

Orienteering Maps.

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SLIDE 5

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.

LiDAR‐ flights Scanning old maps Surveying Capture technical data Digital elevation models Raster data (WMS) Vector (Nat. GDB) Technical data (DB, Lists) GPS, Laser Range Finder Open Street Map

O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s

1 2 3 4 5

Yes/ No

Orthophotos & DEM while vectorizing: ‐ Contour lines ‐ Road & tracks ‐ Vegetation ‐ Cliffs ‐ Others

Complete O

  • m

a p s

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SLIDE 6

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

Editing Raster Topological Adjustments Editing Vectors Editing DB Web maps GDB, WMS Mobile devices Printing

O‐maps O‐maps

6 7 8

O‐maps

Course Setting Routing (OSM)

O‐maps

Cartographic Workflow II.

9

O‐maps

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SLIDE 7

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

Laser Raw Data GRID Hill Shading Contour Lines

LiDAR Data.

DSM ‐ DTM RGB Photo

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SLIDE 8

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

Survey with 36 km2  several days

  • Solution: Split into tiles of 1km km2

6 minutes and merge contour

lines afterwards!

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SLIDE 9

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:

1st use Douglas‐Peucker Algorithm and 2nd change into Bèzier Curve.

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SLIDE 10

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

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SLIDE 11

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

  • 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.

Hill Shading.

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SLIDE 12

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

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SLIDE 13

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
  • f vegetation
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SLIDE 14

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
  • rthophotos
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SLIDE 15

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)

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SLIDE 16

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,

  • U. Steiner
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SLIDE 17

OCAD AG OCAD AG 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°

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SLIDE 18

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

  • rienteering maps
  • rienteering maps?

?

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SLIDE 19

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) Nomenclature Properties Piping Boundaries Permanent erosion and mudflow Address of houses Administrative boundaries

Source : www.cadastre.ch

Contour lines and hill shading are missing! Contour lines and hill shading are missing!

Toilets for dogs

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SLIDE 20

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.

Raw data (DXF) Individual visualization With relief shading and toilets for dogs

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SLIDE 21

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.

LiDAR flights Scanning old maps Surveying Capture technical data Digital elevation models Raster data (WMS) Vector (Nat. GDB) Technical data (DB, Lists) GPS, Laser Range Finder Open Street Map

O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s O

  • m

a p s

1 2 3 4 5

Yes/ No

Orthophotos & DEM while vectorizing: ‐ Contour lines ‐ Road & tracks ‐ Vegetation ‐ Cliffs ‐ Others

Complete O

  • m

a p s

Survey Maps Survey Maps Survey Maps

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SLIDE 22

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

Editing Raster Topological Adjustments Editing Vectors Editing DB Web maps GDB, WMS Mobile devices Printing

O‐maps O‐maps

6 7 8

O‐maps

Course Setting Routing (OSM)

O‐maps

Cartographic Workflow II.

9

Survey Maps Survey Maps Survey Maps Survey Maps Survey Maps Survey Maps Survey Maps Survey Maps Survey Maps

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SLIDE 23

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

  • rienteering maps, it is suitable also for other topographic

maps.

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SLIDE 24

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!