Method for interactively editing GIS topological data set

Abstract

Disclosed is a method for realizing the interactively editing of the GIS topological dataset; the method appends the topological object to the GIS topological dataset to create the topological dataset through the form that the coordinate points are inputted interactively to generate line segments; the method also modifies the topological dataset through moving the arc segments or nodes interactively and realizes the cancellation and recovery operations through adding the transaction mechanism; the cancellation and recovery operations are used for canceling the previous editing operation or recovering the previous cancelled editing operation when the editing result is inconsistent with the expectation or the editing result needs to be rolled back to the previous data state during the editing and processing process of the topological data so that the purposes of improving the safety, interactivity and the work efficiency in editing the GIS topological dataset are realized.

Description

Technical field [0001] The invention relates to GIS vector data editing technology, in particular to a method for interactively editing GIS topology data sets. Background technique [0002] Geographic Information System (GIS) vector data model includes two types, namely Spaghetti data model and topological data model (Chu Peng et al.: Introduction to Geographic Information System, Science Press, 2000, P31-43). In the Spaghetti model, a spatial point is represented by a spatial coordinate, a line is composed of a string of coordinates (called nodes), and a surface is a closed polygon formed by lines. The basic object types of the topology model include nodes, arcs and regions. The arcs are connected by a series of points (also known as nodes), which start from the starting node and end at the ending node; nodes are arcs intersecting or Terminating point; a region is a closed range composed of an outer ring and zero or more inner rings, and a ring is connected by one or more ...

AI Technical Summary

Problems solved by technology

Although these traditional methods can guarantee the correctness and integrity of the topological relationship of the data, because they are not realized by directly operating the topological data set, the operation process is complicated, and the operation results are not directly visible, which is not convenient for editing during the editing process. Real-time discovery and correction of topology errors reduces the security, interactivity and work efficiency of topology dataset editing and processing, and limits the application of topology data models

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