COS – A Land Cover Land Use Map for Portugal

COS – A Land Cover Land Use Map for Portugal
Directorate-General for the Territory
Paulo Patrício ([email protected])
Cristina Igreja ([email protected])
Manuel Valério ([email protected])
Mário Caetano ([email protected])
Pedro Marrecas ([email protected])
COS – Land Cover Land Use Map
• COS is the national reference thematic map for Land Cover Land
Use (LCLU) in Portugal
• In 2011 the Directorate-General for the Territory (DGT) finished the
production of this map for the year 2007
• In 2012 DGT signed a protocol with the Portuguese Environment
Agency to support the production of these maps for the years 1995
and 2010
• Adapt COS to support the Portuguese Kyoto Protocol report
COS 2007 – Technical Specifications
• Nomenclature decided within a working group with representatives
from the following entities:
• Directorate-General for the Territory
• Portuguese Environment Agency
• Institute for Nature Conservation and
Forests
• National Statistics Institute
• Directorate-General for Agriculture and
Rural Development
• Association of the paper industry
• Agriculture and fisheries financing institute
• Institute of vine and wine
• Regional entities
• Office for science and higher education
COS 2007 – Nomenclature
Reference system: ETRS89/PT-TM06
Data structure: Vector (Polygons)
Nomenclature: 5-level hierarchical
classification with 193 classes for the
fifth level, the most detailed
Minimum cartographic unit (MCU) : 1
hectare
Initial data format: Shapefile
Thematic accuracy: ≥ 85%
Positional accuracy: ≤ 5.5 m
COS 2007 – Adaptation to Kyoto nomenclature
COS 2007
COS 2007
193 classes
225 classes
Format: Shapefile
Format: PostGIS 2.0
• The classes Clear-Cuts, Young Plantations and Burnt Areas were
disaggregated by forest species
• In the Agro-Forestry Areas were created 4 new classes related to
the Stone Pine class
COS – Kyoto nomenclature
Level I
Level II
01.Pinus pinaster
02.Quercus suber
03.Eucalyptus
04.Quercus rotundifolia
05.Other quercus
1.Forest Land
06.Other broadleaves
07.Pinus Pinea
08. Other coniferous
09.Rain-fed crops
10.Irrigated crops
11.Rice
12.Vineyards
2.Cropland
13.Olive
14.Other permanent
3.Grassland
15.Grassland
4.Wetlands
16.Wetlands
5.Settlements
17.Settlements
6.Other Land
18.Shrubland
19.Other land
COS – Data to support the classification – Portugal Image Coverages
False color
Coverage: Orthophotos 1995
Resolution: 1 m
Radiometry: Composition with NearInfrared (NIR-Red-Green)
R-G-B
NIR-R-G
Coverages: Orthophotos 2004-2006,
2007, 2010 and 2012
Resolution: 0.5 m
Radiometry: Compositions with 4 bands
(Near-Infrared, Red, Green and Blue)
COS – Data to support the classification – Auxiliary Data
Burnt areas
Olive cadastre
Vineyards
COS – Production strategy
• Areas for production created
according with the 1: 100 000
scale national map series
• 53 rectangular areas with
64 km x 40 km each
COS - Quantum GIS
Plug-in
COS – Quality Control
Structure
Topology
Classification
Topological and thematic
Area < 1ha
Gaps
concordance between the 3
years
Classification inconsistency
COS - Quality Control
Overlapping
polygons
Geometric
inconsistency
between 2 years
Incorrect
polygon
design
COS – Quality Control
Analysis of topological and thematic inconsistencies
between 1995, 2007 and 2010
Intersection of the three maps extracting only the areas that
have changed between the three years;
Analysis using the following criteria;
Polygon dimension: polygons with very small areas represent the
majority of geometric inconsistencies;
Thematic analysis: polygons with unlikely changes between the
threes years.
COS – Quality Control
Topological and Thematic Consistency
COS - 2007
COS - 1995
COS - 2010
COS – Kyoto nomenclature
Control points distribution
Thematic Accuracy Global Results
1995
2007
2010
87.0%
89.3%
88.9%
COS – Final Products
1995
2010
COS – 1995 – 2010 Comparison
(%) - Kyoto Protocol Level I Classes
COS – Conclusion
COS is available trough Open GeoSpatial Consortium (OGC) services , Web
Map Services (WMS) and Web Feature Services (WFS) from:
the Directorate–General for the Territory site – www.dgterritorio.pt
the National Spatial Data Infrastructure (SNIG) – www.snig.dgterritorio.pt
the Portuguese portal for open data – www.igeo.pt
URLs:
• 1995, 2007 and 2010 - Kyoto nomenclature
http://mapas.dgterritorio.pt/wms/cos-kyoto
• 2007 - complete nomenclature
WMS – http://mapas.dgterritorio.pt/wms/cos2007v0n5?service=WMS
WFS – one WFS for each region
• 2010 - complete nomenclature > available in December 2015
COS – Next developments
Study the possibility of changing the nomenclature and adopt a
object-oriented data model
Study and compare COS with other Portuguese Land Cover Land
Use cartographies (e.g. National Forest Inventory, Land Parcel
Identification System)
Develop a tool to support the production of Land Cover Land Use
cartographies
Develop an online platform to allow the users to explore these
data and study the changing dynamics of Land Lover and Land Use
(LCLU) in Portugal
Workshops, Friday, 29th
Workshops - Programa
Sexta, 29 de maio
Workshop 1 - 09:00 – 10:30
Infraestruturas de informação Geográfica em Português à volta do Mundo
Workshop 2 - 11:00 – 12:30
Rumo ao SNIG 2020 e Mentes Criativas
Workshop 3 - 14:00 – 15:30
Serviços de Dados Geográficos INSPIRE
Workshop 4 - 15:30 – 17:00
Panorama atual e evolução dos metadados INSPIRE em Portugal
Thank you
COS – A Land Cover Land Use Map for Portugal