Point-to-point tile map dynamic projection method and device

A tile map and dynamic projection technology, applied in image data processing, graphics and image conversion, instruments, etc., can solve problems such as inability to accurately complete nonlinear conversion of different coordinate systems, inability to realize seamless splicing of adjacent tiles, etc., to achieve Guaranteed drawing speed and expanded application range

Active Publication Date: 2014-11-05
国科创(北京)信息技术有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a point-to-point tile map dynamic projection method and device, so as to solve the problems existing in th

Method used

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  • Point-to-point tile map dynamic projection method and device
  • Point-to-point tile map dynamic projection method and device
  • Point-to-point tile map dynamic projection method and device

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Embodiment Construction

[0048] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the accompanying drawings and specific implementation examples.

[0049] The present invention provides a point-to-point tile map dynamic projection method and device for the existing problems that the nonlinear conversion between different coordinate systems cannot be accurately completed and the seamless splicing of adjacent tiles cannot be realized.

[0050] Implementation example one

[0051] Such as figure 1 Shown is a flow chart of a point-to-point tile map dynamic projection method provided by Example 1 of the present invention. The method includes the following steps:

[0052] S101: Obtain the map display range requested by the client user and the client display coordinate system, and determine the tile map range requested by the user according to the map display range requested by the...

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Abstract

The invention provides a point-to-point tile map dynamic projection method and device, and belongs to the technical field of network maps. The point-to-point tile map dynamic projection method includes the steps of obtaining the map display scope requested by a user at a client terminal and a client terminal display coordinate system, and determining the tile map scope requested by the user at the client terminal; determining the best map display layer and the corresponding tile rank position on the best map display layer according to the tile map scope and a map display plotting scale requested by the user, and forming a tile data sequence; determining rectangular scopes of tiles, located in the tile data sequence requested by the user, projected to the client terminal display coordinate system, and converting the rectangular scopes into client coordinate scopes displayed by tile data; generating internal storage bitmaps same in size according to the client coordinate scopes displayed by the tile data, and drawing a tile map with the point-to-point tile map resampling method. According to the technical scheme, the tile map is drawn through point-to-point dynamic projection in a conversion mode, and dynamic projection conversion and seamless splicing for embedding the tile map into a GIS are achieved.

Description

technical field [0001] The invention relates to the technical field of network map release and map resource client integration, in particular to a point-to-point tile map dynamic projection method and device. Background technique [0002] Compared with the Web Geographic Information System (WebGIS), the desktop Geographic Information System (GIS) has richer functions and stronger analysis and processing capabilities. Complex professional analysis and processing functions still need to be completed locally, especially in the case of a large amount of processed data and high request response performance requirements, desktop GIS can better meet the needs of users than WebGIS. Applying the map tile technology to the desktop GIS can not only call the tile map service on the remote server, enrich the data of the GIS system, reduce the investment in basic data, but also use the powerful analysis and processing capabilities of the desktop GIS to satisfy users. professional needs. ...

Claims

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Application Information

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IPC IPC(8): G06T3/00
Inventor 陈军唐古拉文军
Owner 国科创(北京)信息技术有限公司
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