Map base map integration method

Abstract

The invention relates to the field of map making, and discloses a map base map integration method which comprises the following steps: S1, preprocessing a pixel map to reduce the file size of the pixel map, segmenting the pixel map and generating a coordinate position to obtain a subordinate map; S2, converting the subordinate map into a vector graph: calculating the resolution of the subordinategraph through the pixels of the minimum slice subordinate map and the lens magnification, and optimizing the vector graph to reduce the file size of the vector graph; s3, integrating the vector diagram into a map base map: determining the scale of the vector diagram according to the scale of the map base map, further determining the coordinates of two diagonal points of the vector diagram on the map, and integrating the vector diagram into the map base map to form a target map; and checking whether the positions of the key points are consistent with the standard map on the target map. According to the method, the size of the vector diagram file can be reduced, the number of required slice pixel graphs is greatly reduced, the picture is not blocked during operation, and the user experienceis improved.

Description

technical field [0001] The invention relates to the field of map drawing, in particular to a map base map integration method. Background technique [0002] At present, LBS (location-based service) has been greatly developed. With the addition of the Internet and the Internet of Things, more and more applications based on maps and locations have been developed and used, such as positioning, taxis, running, navigation, and surrounding life. , travel and so on. Provide basic and extended LBS service providers including Baidu, AutoNavi, Google, etc. Each R&D manufacturer can carry out secondary development on the basis of basic services according to their own different needs, expand and extend their own functional applications, and provide more detailed , more considerate service. [0003] In many application scenarios, the minimum scale of the map provided by the basic service provider is relatively large (generally 10 meters), or the details are not detailed enough, or the u...

AI Technical Summary

Problems solved by technology

Take a map with a length and width of 10 kilometers as an example. From a scale of 10 kilometers, the map is enlarged to a level of 10 meters. The tile map integration method needs to be at least 8 levels, and the number of sliced ​​images required is at least 4+4^2+4^3 +4^5+4^6+4^7=21844, a single picture is calculated with an average value of 10k, and requires a storage space of about 218M. At the same time, it is also necessary to calculate the position coordinates of the picture according to the slice algorithm, and record at least two for each picture For oblique coordinate point positions, 21844*2=43688 pieces of data need to be recorded. The amount of coordinate conversion calculation, network traffic, and storage space consumption are relatively large. When the network speed is slow, there will be obvious loading delays, and the map will have missing blocks. Phenomenon

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