Rakslite grupeerimiseks, samuti leviku, liikumisteede jms seotud ülesannete lahendamiseks on vaja paika panna rasterandmete peamine topoloogiareegel: tuleb kindlaks määrata, kas igal rakslil on neli või kaheksa naabrit.
Topology rules define the permissible spatial relationships between features. The rules you define for a topology control the relationships between features within a feature class, between features in different feature classes, or between subtypes of features.
