Fuzzy Reliability in Spatial Databases

Table 5

Layers and parameters of the spatial database.

Thematic dataset	Layer	Parameter
(1) Aerial photogrammetric data	(1.1) Streets	Density of isolated lines
		Density of unlabeled lines
	(1.2) Buildings	Density of intersecting polygons
		Density of polygons with uncoded height value
		Density of polygons with wrong height value
	(1.3) Spot elevations	Density of uncoded points
		Density of points with wrong elevation value
	(1.4) Contours	Density of uncoded lines
		Density of lines with wrong elevation value
(2) Cadastral data	(2.1) Terrain parcels	Density of intersecting polygons
		Density of uncoded polygons
	(2.2) Buildings parcels	Density of intersecting polygons
		Density of uncoded polygons
		Density of polygons not overlapping buildings
	(2.3) Land use	Density of intersecting polygons
		Density of unlabeled polygons
(3) Hydrology	(3.1) Rivers	Density of unlabeled lines
		Density of overlapping lines
	(3.2) Lakes	Density of intersecting polygons
		Density of unlabeled polygons
	(3.3) Aquifers	Density of polygons with wrong piezometric elevation value
(4) Geology	(4.1) Surface geology	Density of intersecting polygons
		Density of unlabeled polygons
	(4.2) Land slides	Density of intersecting polygons
		Density of unlabeled polygons
	(4.3) Alluvial zones	Density of intersecting polygons
		Density of unlabeled polygons
(5) Infrastructural networks	(5.1) Road network	Density of overlapping lines
		Density of unlabeled arcs
	(5.2) Drainage system	Density of overlapping lines
		Density of unlabeled arcs
	(5.3) Water supply network	Density of overlapping lines
		Density of unlabeled arcs
	(5.4) Electricity grid	Density of overlapping lines
		Density of unlabeled arcs