Spatial data harmonization
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21-Oct-2014 -
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Transcript of Spatial data harmonization
Spatial Data Harmonization
DEFINITION
● Data harmonisation – providing access to spatial data through network services in a representation that allows for combining it with other harmonised data in a coherent way by using a common set of data product specifications
DEFINITION
● Harmonised data product specifications – set of data product specifications that support the provision of access to interoperable spatial data through spatial data services in a representation that allows for combining it with other interoperable spatial data in a coherent way
DATA INTEROPERABILITY COMPONENTS
HARMONIZATION
Source data model Target data model
Zemgale urbanplaning
(specific data model)
CORINE landcover
Geometry
Reclassification
HARMONIZATION
HARMONIZATION STEPS
● Definition of reclassification rules● Data reclassification● Union of touching geometries in same class● Transformation from multipolygon to polygons
HARMONIZATION STEPS IN
● Definition of reclassification rules → Create mapping table
● Data reclassification → SQL JOIN using mapping table
● Union of touching geometries in same class → Spatial aggregate function Union
● Transformation from multipolygon to polygons → Spatial function dump for converting multipolygon to polygon
ZEMGALE DATA MODEL
Atribute Field Explanation Type
VEIDS Planed land use type (see possible values down) Text 50
INDEKSS Area with speciffic restrictions Text 10
PLATIBA Area(m2) Long Integer
TER_VIEN territorial unit Text 50
ADM_TER administrative area Text 50
LAYER Layer number in CAD systems Text 50
PIEZIMES notes Text 100
LAND COVER DATA MODEL
CORINE land cover
RECLASSIFICATION RULES
1 DzM Low-rise residential dwellings → 11 Urban fabric
2 DzV Multi-residential dwellings → 11 Urban fabric
3 P Public Building → 11 Urban fabric
4 RR Production facilities and warehouses → 121 Industrial or commercial units
5 RD Mining area → 131 Mineral extraction sites
6 T Technical Building → 12 Industrial, commercial...
7 Ū Waters → 5 Water bodies
8 M Forests → 31 Forests
9 ZĪ Outstanding foliage sites No corresponding class
10 ZC Other groomed greenery space → 141 Green urban areas
11 L Rural Land → 2 Agriculture areas
12 No data No corresponding class
ZEMGALE CLASSIFICATION → CORINE NOMENCLATURE
RECLASSIFICATION QUERY
SOURCE & TARGET DATA SETS
TARGET DATA SET