GIS Mapping Representation Based on Rule and Override
According to lacking in the mapping expression of traditional GIS,introduces mapping rule and override in ArcGIS 9.2. Mapping rule is expansion of entity symbolization,which is stored in mapping representation field added in feature attributes,include symbol parameters,such as symbol size,angle,style,and offset and confliction tactics. Mapping override is exception of mapping rule,a strategy similar to symbolic entities. Based on the research,applies it to land system mapping based on a geodatabase in Foshan city. With mapping rule and override,features are being drawn to solve special display and confliction according to symbols parameters,and some complex entities be represented and conformed to mapping standard. The application methods have greatly enhanced the efficiency of the cadastral mapping and richened the ability of the complex features represented.Our research declares that it is entirely feasible to seamless integration of symbolization of the complex features,multi-purpose mapping and spatial data analysis.