Surface feature symbolization method for realizing map library integration

Abstract

The invention discloses a surface feature symbolization method for realizing map library integration. The method comprises the following steps: S1) configuring a symbol library template; S2) defining surface feature symbols, and describing shapes of the surface feature symbols by description statements; S3) uploading and analyzing the symbol library template on a drawing platform; S4) symbolizing the drawn surface features in real time; S5) editing continuation attribute values of the surface feature symbols by using an attribute control panel; S6) fine adjusting the shapes of the symbols by setting characteristic points; S7) when data is input to a database, creating feature classes and inputting information according to the corresponding relation of the surface feature symbols and the feature classes in a GIS (Geographic Information System) table. The invention adopts the symbolization protocol rules in the symbolization technology: all the surface feature symbols are formed by nesting basic entities, and in the instantiation process of the surface features, only one feature is needed for precise expression. According to the method, the storage space needed by the symbols is greatly reduced, the generation of extra auxiliary symbols and entities is avoided, and the map library integration is truly realized.

Description

technical field The present invention relates to the technical field of geographic information, and in particular to a complete feature symbolization method capable of realizing the integration of a library for map mapping and storage. Background technique As a major form of geographic information visualization, maps have existed for thousands of years, and modern maps have strict mathematical foundations and systematic map symbols. In the field of surveying and mapping, in order to make topographic and cadastral maps concise and beautiful, and to facilitate the identification of objects, determination of orientation and measurement calculations on the maps, some graphics and annotations have been formulated to represent certain physical features. These graphics and annotations are called feature symbols. Feature symbols are the basic language unit for expressing geographic information on topographic and cadastral maps. The symbolization of topographic map data is directl...

AI Technical Summary

Problems solved by technology

The current symbolization method usually needs to modify the program when customizing some complex symbols, which brings a lot of inconvenience to the platform users

Images