A Method for Automatic Classification and Configuration of Map Annotation Based on Visual Variables

Abstract

The invention relates to a visual-variable-based automatic classification and configuration method of map lettering, comprising the steps of: customizing a map lettering configuration rule base; inputting geographic data and carrying out mapping expression on the geographic data; calculating graphical symbol variable of single feature element; and matching the rules in the lettering configurationrule base, selecting a lettering configuration mode and finishing classification and configuration of the map lettering. In the visual-variable-based automatic classification and configuration method, the map lettering configuration is divided into seven basic configuration modes according to the substitutive characteristics and the configuration rule requirements of the feature elements needing to be lettered in the national basic scale topographic map, and simultaneously, the expansion and the combined use of the lettering configuration modes are supported; and the map lettering configuration model which is simple and is easy to realize is provided, so that automatic selection of the map lettering configuration modes in mapping of a computer map can be realized. In the visual-variable-based automatic classification and configuration method, the selection problem of lettering configuration modes of the example-level feature elements is solved, and the lettering automation level and the lettering quality in the national basic scale topographic map are improved.

Description

technical field [0001] The invention relates to the field of electronic map and digital map drawing, in particular to a method for automatically classifying and configuring map notes based on visual variables. Background technique [0002] Annotation is a very important part of maps (including paper maps and electronic maps), and its automatic configuration is one of the key issues in computer cartography and geographic information systems. On the one hand, with the development of the national economy, the requirements for basic surveying and mapping and topographic map updates are getting higher and higher, and the update speed is also getting faster; on the other hand, the development of information technology represented by computers and networks has prompted the world Countries have accelerated the informationization process of surveying and mapping technology, making the traditional map-making technology move towards computer-aided map-making and cartography automation;...

AI Technical Summary

Problems solved by technology

[0004] The automatic configuration of map annotation is recognized as an NP-hard problem. Since the first attempt to automatically draw maps, a large number of methods have been applied to this problem, such as expert systems, integer programming methods, combinatorial optimization, heuristic algorithms, simulations, etc. Annealing algorithm, genetic algorithm, etc., the main disadvantages of such existing technical solutions are high experimental complexity and relatively low efficiency

Images