nonGeographicDataset: PROPERTY_VIEW_DVP

Part of VMPROP, PROPERTY_VIEW_DVP is an Aspatial table. It is created by comparing the polygons in the PROPERTY_VIEW table with the polygons in the DISPLAY_VIEW_POLYGON table. It holds a record for each PFI in the PROPERTY_VIEW table, and the DISPLAY column has a value indicating whether the polygon is Inside, Outside, or Both (partly inside and partly outside) a DISPLAY_VIEW_POLYGON polygon. This table provides a way of limiting the display of property_view polygons so maps can be drawn efficiently. Polygons with a DISPLAY value of I (inside) can be drawn at larger scales (eg 1:5000), while those with O (outside) can be drawn at smaller scales (eg. 1:50,000). This means rural areas can be displayed at a suitable scale, without the burden of displaying polygons in a town. A DISPLAY value of B (both) is used for some polygons, which can be drawn at both scales. These can be rivers, or multi-part polygons with parts inside and outside the DVP. To use this flag for drawing a join is needed - property_view.pfi = property_view_dvp.property_view_pfi