Best Pratices for Polygon Generalisation from medium to small Scale in a GIS Framework - Advances in Cartography and GIScience - page 525

ThePe ThePe shRrt QaPe Characteristic fieOd
AdPiQistrative uQits AU AUC2DE cRde

BuiOtup areas BA 1A0E QaPe

AUC2DE1 the cRde Rf the AdPiQistrative uQits that
the BuiOtup area beORQgs tR (caOcuOated by spatiaO
RperatiRQ)

WatercRurse Areas WA HYC type

BuiOtup areas withRut
eQcOaves

BAQRe 1A0E1 QaPe

WatercRurse Areas
withRut eQcOaves

WAQRe HYC1 type

Table 1: Polygon themes in a medium scale database.

In Table 2 , a number of rules that satisfy the inter-theme consistency con-
straints are presented along with proposed actions. The rules application
requires the use of the auxiliary structure and map overlay operators. A
logical condition based on the attributes of the themes permits the selection
of the polygons. Selected polygons are handled as the action dictates.
Administrative units are considered of higher accuracy and their geometry is
not affected by the rules. After the successful management of the polygon
issues ( Figure 2 and Figure 3 .), the original themes are reconstructed. The
above procedure creates consistent themes and can therefore be considered
as a best practice for similar problems of polygon themes.