Vegetation height maps derived from Vegetation height maps derived - - PowerPoint PPT Presentation

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Vegetation height maps derived from Vegetation height maps derived - - PowerPoint PPT Presentation

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Vegetation height maps derived from Vegetation height maps derived from digital elevation models the next digital elevation models the next innovation in the production of innovation in the production of orienteering maps? orienteering

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SLIDE 1

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Vegetation height maps derived from Vegetation height maps derived from digital elevation models digital elevation models – – the next the next innovation in the production of innovation in the production of

  • rienteering maps?
  • rienteering maps?
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SLIDE 2

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

20 years ago: Digital Cartography with OCAD 4/5/6/7 Base Map: Scanning

  • r Vectorizing Survey Map

Photogrammetric plot Surveying: Step counting Compass bearing Visual perception Drawing: Digitalization Boards Computer Mouse Printing: Spot color printing CMYK printing

Development of Orienteering Maps.

  • 1. Revolution
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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

8 years ago: LiDAR data / DEM / Tablets (OCAD 10/11) Base map: Digital Survey Maps / WMS LiDAR data / Digital Elevations Models  Contour lines  Relief Shading  Slope Map  Cliffs Surveying: GPS‐Receiver  Tracks Laser Range Finder Tablet PC Drawing: Computer Mouse Printing: (Spot color printing) CYMK printing

Development of Orienteering Maps.

  • 2. Revolution
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SLIDE 4

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Laser Raw Data GRID Hill Shading Contour Lines

LiDAR Data.

DSM ‐ DTM RGB Photo

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013 Illustration: B. Imhof,

  • U. Steiner

Contour Lines.

  • Problem: jagged contour lines
  • Solution:

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

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 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!

  • Problem: Perception of landforms

in the terrain is not always identical with the derived contour lines from DEM

  • Solution: not yet solved 

Research at ETH Zurich

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SLIDE 7

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

  • Open hill shading as background

map and vectorize the land form features, like ‐ Road and track network ‐ Ditches and depressions ‐ Knolls

  • 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.

Illustration: B. Imhof,

  • U. Steiner
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SLIDE 8

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Contour Lines vs. Hill Shading

Illustration: B. Imhof,

  • U. Steiner
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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Cliffs.

Deriving cliffs

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SLIDE 10

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Orthophotos.

  • Open georeferenced orthophotos as a

background map and vectorize vegetation edges.

  • Quality can differ a lot, due to the date
  • f the shot.
  • Restriction due to shadow and stage of

vegetation

Illustration: B. Imhof,

  • U. Steiner
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SLIDE 11

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Vegetation Height Maps.

Orthophotos vs. Vegetation Heights Maps (DSM minus DTM)

Illustration: B. Imhof,

  • U. Steiner
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SLIDE 12

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Vegetation Height Maps.

Orthophotos vs. Vegetation Heights Maps (DSM minus DTM)

Illustration: B. Imhof,

  • U. Steiner
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SLIDE 13

OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Vegetation Height Maps.

Latest tests for WC 2014 in Switzerland (DEM 0.5 m)

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Detection of Vegetation Types.

Approach (Ch. Hohl and Th. Gloor 2007): ‐ Detect vegetation types according infrared reflection ‐ Use control sample areas in the terrain as reference in satellite picture ‐ Use “hard” and “soft “ classifiers algorithm for identifying and extrapolate sample areas Results: ‐ Canopy of trees disturbed identifications too much!

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Detection of Vegetation Types.

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Conclusion.

Laser Airborne Scanning has revolutionized orienteering maps very much:

  • Step counting and compass bearing will disappear
  • Field checkers can locate themself almost everywhere
  • Products: Contour lines / Hill shading / Cliffs
  • Vegetation Height Map

‐ Useful to detect vegetation boundaries  Challenge: Detect and classify type of vegetation (runability, undergrowth, etc.) ‐ Fist research with infrared satellite images has been done without success ‐ New approach with LiDAR and infrared pictures.

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

We do what ever it takes to make your We do what ever it takes to make your maps perfect. maps perfect.

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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Cartographic Workflow I.

LiDAR- flights

Scanning old maps Surveying Capture technical data Digital Elevation- models (DEM) Raster-data (WMS-Server) Vector (Nat. GDB) Technical Data (DB, Lists) GPS, Laser Range Finder Open Street Map

O

  • m

a p s O

  • m

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  • m

a p s O

  • m

a p s O

  • m

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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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OCAD AG OCAD AG Mühlegasse 36 CH-6340 Baar / Schweiz www.ocad.com Vege getatio tation height height map maps, the ne , the next inn xt innovatio vation for for O- O-map maps? - ? - ICC Dresd CC Dresden n 28 28th

th August 2013

August 2013

Editing Raster

Topological Adjustments

Editing Vectors Editing DB WEB- Maps GDB, WMS- Server Mobile Devices Printing

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  • m

a p s O

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a p s

6 7 8

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  • m

a p s

Course Setting Routing (OSM)

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Cartographic Workflow II.

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