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