Map base map integration method

An integrated method and map technology, applied in 2D image generation, image data processing, still image data retrieval, etc., can solve problems such as lack of map blocks, coordinate conversion calculation, network traffic, and large storage space consumption, etc. Smooth zooming, reduced slicing and coordinate calculation work, fast access to effects

CN111026891APending Publication Date: 2020-04-17HUNAN ZHITONG ENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2020-04-17

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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.
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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...

Examples

Embodiment

[0063] In an application in Xinjiang Airport, it is necessary to integrate the construction map into the map, and at the same time, it is required that the map lens zoom in without loss. The original base map provided is in DWG format, the size of the source file is 7.36Mb, and the pixel size is 8001*6423. This scheme is used for vector map conversion.

[0064] The S1 source file is simplified, the pixels are unchanged, and unnecessary complex composition layers are deleted, effectively reducing the file size to 4.52Mb;

[0065] S2 dwg is converted to svg format, the pixels are unchanged, and the vector file size after conversion is 1.71Mb;

[0066] The S3 svg vector image is optimized by the svgo algorithm, and the file size of the vector image is finally reduced to 840kb.

[0067] The vector map is integrated into the Gaode map by the map base map integration method of the present invention. The map base map is not limited to the Gaode map, other maps such as Google map, Ba...