SIOSE Data Model |
  
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SIOSE Data Model |
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SIOSE uses a conceptual standard model data model, interoperable and harmonized of Land Cover and Land Use, according to ISO 19101 (Geographic Information – Reference model):
•Multi-parameter: Several attributes for the same polygon, main entity.
•Multicriteria: Cover and Use linked with the polygon.
•Extensible and compatible with other national and European projects.
•Metadata assignment according to Spanish Metadata Core and ISO 19115.
•Object oriented uses Entity-Relation Model according to UML.
His main characteristics are the following:
•The polygon is the work entity. It is the land spatial unit who has a homogeneous Land Cover and Land Use. Moreover, the polygon is the only entity with own geometry in SIOSE data model. It’s defined by a set of arcs which limited his surface extension, and it separate two environments of different Land Cover.
•Linked with the polygon there are two super-classes called Use and Cover. Coverage it’s the type of surface on the land or the items that appear on this surface, and therefore it can be obtained by its biophysical properties. Use is relating to socioeconomic activities that take place on the land, and therefore they can be overlayed over the surface.
•SIOSE Data Model allows the assignment of one or more Cover and Uses types to a single polygon. Cover value always occupy 100% of them, however the use can occupy the 100% or not.
•Polygons have a single cover when there is only one cover. They have a compound cover when there are two or more singles cover and/or compound cover in turn. Depending on the combination type, compound cover could be an Association or a Mosaic. Association is the coverage combination without a fixed distribution. Mosaic is the coverage combination whose geometric distribution and separation is clearly.
•Changes in data models keep the interoperability between SIOSE and others Europeans, national and regional data bases:
oCORINE Land Cover (90, 2000 and coming soon 2006)
oCrops and Land Use Maps
oForest Map from Spain
oCadastral
oNational Cartographic Base
oRegional Data Base of Land Cover and Land Use
The University of Zaragoza has reviewed this version with the aim to adapt it to ISO/TC211 and to Open Geospatial Consortium standards, and its conversion into the model and physical data base