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Revision of National Vegetation Mapping in Wales using eCognition Professor Richard Lucas University of Wales, Aberystwyth In collaboration with Environment Systems Countryside Council of Wales Definiens
Overview ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Wales or Cymru AU: Proud to be a Definiens  Centre of Excellence
Phase 1 Habitat Mapping in Wales ,[object Object],[object Object],[object Object],[object Object]
What do ecologists observe? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
What do RS scientists observe? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Pilot: Classification of habitats & agricultural land, Berwyn Mountains NE Wales Based on time-series of Landsat sensor data Rule-based approach that coupled knowledge of ecology with that of remote sensing scientists
Approach to classification
Sequential use of rules
The Approach to Mapping in Wales
Division of Wales into Projects ,[object Object],[object Object]
Pre-processing and Ancillary data ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
SPOT-5 (March) Landsat (March) SPOT-5 (April) IRS (May) Landsat (July) Landsat (Sept) Multiple sensors, seasonal observations
Landsat ASTER IRS SPOT Geometric Correction:  Orthorectification
Standardization for data comparability ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Definiens’ Cloud Screening
Endmember Fractions & Indices ,[object Object],[object Object],PV Shade Photosynthetic  vegetation Shade/moisture
Wet & Dry; Bogs, Bracken & Grassland Bogs (outlined in white) mapped by lower vegetation (photosynthetic) and greater moisture fraction (based on ASTER data). Areas of purple moor grass (black) and bracken (orange) mapped using a combination of SPOT non photosynthetic vegetation and shade/moisture fraction images.
Wales is a land of fields  Image segmented  using unit (field)  boundaries Multi-resolution  segmentation  (using larger scale factors) applied within the unit  boundaries Areas outside of  field boundaries  (mainly uplands) using a small scale  factor (1 - 2 pixels)
Hierarchical Layers Super level Level 1 Sub level
Rules based on ecological knowledge ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Dealing with Complex Mosaics ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Fuzzy Membership ,[object Object],[object Object],[object Object],[object Object]
Fuzzy Membership ,[object Object]
Fuzzy Membership
Fuzzy Membership ,[object Object]
Cambrian Mountains:  An  example of mapping complex habitats in the uplands
Cambrian Mountains:  Example of mapping in uplands
Cambrian Mountains:  An  example of mapping complex habitats in the uplands
Comparison of Habitat Maps Vexcel Aerial Photography Sub-habitat Classification Original Phase 1 Survey
Hedgerow Mapping
Transferring to a Phase 1 Habitat Class ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Habitat classification Revised Phase 1 Classification
Examples of Revised Phase 1 Maps Black Mountains The Welsh Valleys Ceredigion
Revised Phase 1 Mapping for Blaenavon World Heritage Sites
Accuracy of Mapping ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Habitat Mapping and Monitoring in Wales ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Concept of a Rolling Program ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Use of Definiens Software ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Acknowledgements ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],For further information email:  [email_address] ,  [email_address] ,  [email_address]

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E Cognition User Summit2009 R Lucas University Wales National Vegetation Mapping

  • 1. Revision of National Vegetation Mapping in Wales using eCognition Professor Richard Lucas University of Wales, Aberystwyth In collaboration with Environment Systems Countryside Council of Wales Definiens
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  • 3. Wales or Cymru AU: Proud to be a Definiens Centre of Excellence
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  • 7. The Pilot: Classification of habitats & agricultural land, Berwyn Mountains NE Wales Based on time-series of Landsat sensor data Rule-based approach that coupled knowledge of ecology with that of remote sensing scientists
  • 10. The Approach to Mapping in Wales
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  • 13. SPOT-5 (March) Landsat (March) SPOT-5 (April) IRS (May) Landsat (July) Landsat (Sept) Multiple sensors, seasonal observations
  • 14. Landsat ASTER IRS SPOT Geometric Correction: Orthorectification
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  • 18. Wet & Dry; Bogs, Bracken & Grassland Bogs (outlined in white) mapped by lower vegetation (photosynthetic) and greater moisture fraction (based on ASTER data). Areas of purple moor grass (black) and bracken (orange) mapped using a combination of SPOT non photosynthetic vegetation and shade/moisture fraction images.
  • 19. Wales is a land of fields Image segmented using unit (field) boundaries Multi-resolution segmentation (using larger scale factors) applied within the unit boundaries Areas outside of field boundaries (mainly uplands) using a small scale factor (1 - 2 pixels)
  • 20. Hierarchical Layers Super level Level 1 Sub level
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  • 27. Cambrian Mountains: An example of mapping complex habitats in the uplands
  • 28. Cambrian Mountains: Example of mapping in uplands
  • 29. Cambrian Mountains: An example of mapping complex habitats in the uplands
  • 30. Comparison of Habitat Maps Vexcel Aerial Photography Sub-habitat Classification Original Phase 1 Survey
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  • 33. Examples of Revised Phase 1 Maps Black Mountains The Welsh Valleys Ceredigion
  • 34. Revised Phase 1 Mapping for Blaenavon World Heritage Sites
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