Coordinate conversion method and apparatus

Abstract

The embodiments of the invention provide a coordinate conversion method and apparatus. The method comprises the following steps: mapping pixel coordinates of a point to be converted in a two-dimensional plane graph to be converted to a panoramic sphere to generate a panoramic scene; converting a three-dimensional coordinate system of the panoramic scene into an angle coordinate system; according to a latitude and longitude relative relation between the point to be converted and a center point of the panoramic sphere, calculating a relative angle relation between the point to be converted and the center point of the panoramic sphere; and according to the relative angle relation between the point to be converted and the center point of the panoramic sphere and an inverse conversion relation from the angle coordinate system to the three-dimensional coordinate system, generating three-dimensional coordinate values of the point to be converted so as to complete conversion of the point to be converted from two-dimensional coordinates to three-dimensional coordinates. Through such a mode, any points in space are mapped to the angle coordinate system by use of latitudes and longitudes and heights, and through strong association between a panoramic map and a two-dimensional map, conversion from the two-dimensional coordinates to the three-dimensional coordinates is realized.

Description

technical field

[0001] The present invention relates to the technical field of panoramic maps, in particular to a coordinate conversion method and device. Background technique

[0002] In the safe city project and the command and dispatch business of public security, maps occupy a very important position. At present, the application of two-dimensional maps is very mature, and plays an important role in the field of command and dispatch of public security, such as PGIS map, Tiandi map, etc. The two-dimensional map can grasp the situation of the whole city very well in the overall situation, it is very convenient for users to use, and it is well received. Compared with two-dimensional maps, satellite maps, E-city maps and three-dimensional maps are all supplements to two-dimensional maps in detail. For example, when an emergency occurs somewhere, the public security hopes to know the situation on the scene. At this time, the two-dimensional map cannot answer the user's questi...

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