A gis system and its geographic location calibration and query method

Abstract

The invention discloses a geographic position calibrating and querying method for a geographic information system (GIS). The method comprises the following steps of: calibrating geographic positions of a linear entity and a point entity; storing the positions of calibrated geographic entities such as the linear entity and the point entity; and querying the positions of the linear entity and the point entity, wherein the geographic position of the calibrated linear entity comprises the orientation and the relative position of the linear entity; and the geographic position of the calibrated point entity comprises the geographic position of a linear entity which is closest to the point entity, and the relative position of the point entity. The invention further discloses the geographic information system (GIS). In the method, the geographic position is calibrated according to the relative position relationship between the point entity and the linear entity, and the method does not depend on the conventional GIS; manual input is convenient to realize; and the method has high expandability and reliability.

Description

technical field [0001] The invention relates to a GIS system and its geographical position marking and querying method. Background technique [0002] GIS (Geographic Information System: geographic information system) is a computer system that deals with the input, output, management, query, analysis and decision-making of geographic data. The basic technologies are database, map visualization and spatial analysis. [0003] As far as GIS conceptual data models are concerned, there are currently two main categories: topological relational data models and entity-oriented data models, among which topological relational data models are commonly used in early GIS application systems. These two models have their advantages in the scalability of storage structure, the expressibility of complex geographical entities, the efficiency of single entity query and topology query. [0004] The topological relationship data model organizes and stores various geometric elements based on the ...

AI Technical Summary

Problems solved by technology

Another method is to create your own code. In the creation process, some methods directly use the house number as part of the data to calibrate the location of the building. Although the house number in my country gradually increases from east to west and from south to north, odd and even numbers are used. Distinguish the numbering rules on both sides of the street, but because some house numbers do not actually conform to their definition rules, if we copy and enter the location of the real estate relative to the street, it will become dirty data

Images