Wolfgang Stemberger, GeoVille Gebhard Banko, Environment ...
Transcript of Wolfgang Stemberger, GeoVille Gebhard Banko, Environment ...
Using Pléiades Data for Large Scale Production of VHR Land Cover in Urban Areas of Austria
Wolfgang Stemberger, GeoVille Gebhard Banko, Environment Agency Austria
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Urban project references in 50 countries
• Land Information System Austria
• A remote sensing based land monitoring system
data acquisition
data storage
data analysis
statistics
What is LISA ?
LISA Evolution
• Daily land „consumption“ approximately 24 ha (?) • Documentation of landscape changes
• rising land consumption • Space relevant administration
• reporting obligations on regional, national & European level
• implementation of directives • Data for planning future land consumption • Operational needs in private industry (e.g.
telecom, transport, ...)
Why do we need LISA?
• Description of earth‘s surface without considering use
• 15 classes with 12 attributes
• Objects with a size beginning from 25 m²
• Based on satellite data, orthophotos & elevation data
• Pléiades: Clouds and tilting to be avoided when tasking
• Object-based classification approach
LISA Land cover
Classes MMU Description 1 Buildings 25 m² Buildings with all types of use
2 Other constructed areas 25 m² Sealed areas except buildings, gravelled streets and parking zones
3 Bare soil 50 m² Non-vegetated, bare soil
4 Screes 50 m² Unconsolidated sediments as debris, scree slopes, crushed stones and sandy sections
5 Bare rock 50 m² Rocks and (solid) bedrock 6 Surface water 50 m² Open surfaces standing water bodies and watercourses 7 Snow 50 m² Temporarily snow-covered areas 8 Ice 50 m² Glaciers and ice fields 9 Trees 25 m² Single trees and groups of trees
10 Bushes 50 m² Bushes, hedges in settlements, dwarf pines and afforestation areas with low tree heights
11 Dwarf shrubs 50 m² Outspread dense population of dwarf-shrubs
12 Herbaceous vegetation 50 m² Artificial green areas (gardens and fields) and natural grassland
13 Reeds 50 m² Reed belts
14 Shadow 500 m² Non-interpretable shaded areas due to topographic conditions
15 Clouds 500 m² Non-interpretable areas due to clouds
LISA Land cover – Data model
Land cover - Workflow
Pléiades (CIR) Segmentation Buildings Classification
Land cover – Vienna
Land cover - Vienna
Large-scale Production • 10,000 km² in urban agglomerations of Austria • Input data: Pléiades, WorldView-2, orthophotos,
Laserscanning data, NO ancillary data • Temporal coverage: 2011 – 2013 • Spatial Resolution: 0,5 m
Large-scale Production • Independent validation by scientific team • Quantitative validation (stratified random point
sampling) reveals overall accuracies > 90 % for all production sites
• Buildings almost detected to 100 % • According to Austrian user organisations a major success
in the development of a national land monitoring system
The Federal Office of Metrology and Surveying of Austria (BEV) will produce LISA land cover nationwide on a regular basis
• Description of earth‘s surface considering use • 25 classes + 72 attributes • Smallest objects: 1.000 m2 • Based on land cover, orthophotos, surface models,
satellite data & ancillary data
LISA Land use
LISA Land use (Salzburg)
• 2 year ESA funded project • Implement a multi-scale and multi-purpose LIS
– multiscale: HR and VHR – multipurpose: integrate the needs of several sectors
• Make full use of the capacities of Sentinel-2 – Enriched VHR land cover (including attributes specific for the
urban domain, e.g. greenness index) – HR LC map for entire Austria – Identify static, cyclical and conditional changes
• Standardise the LISA data model through compliance with EAGLE data model
GSE CadasterENV
www.landinformationsystem.at