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PDF tile map and manufacturing method

A technology of tile map and production method, applied in the field of PDF map, can solve the problem that the effect of symbolized map is not good enough

Active Publication Date: 2018-09-04
中国人民解放军61540部队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the vector tile map adopts graphical representation, based on geographical elements, and quickly obtains a symbolic map by establishing a symbolic mapping mechanism, but the effect of this symbolic map is far inferior to the edited standard map for publication

Method used

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  • PDF tile map and manufacturing method
  • PDF tile map and manufacturing method

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Experimental program
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Embodiment Construction

[0092] The present invention will be described in detail below in combination with specific embodiments.

[0093] The present invention relates to a PDF tile map and a production method thereof. The strategy of storing the PDF map in blocks in the PDF format is adopted to establish a PDF tile map pyramid model, and transform other projected PDF maps into a Web Mercator projection PDF map through projection. Based on the PDF tile map pyramid model, the Web Mercator projection PDF map is cropped, and the PDF tile maps with the same tile coordinates are stitched together to finally obtain the PDF tile map, such as figure 1 shown, including the following steps:

[0094] Step 1: Create a pyramid model of the PDF tile map.

[0095]The pyramid model is a multi-scale model. While maintaining data continuity, the model can be constructed using the magnification relationship to realize functions such as infinite zooming and seamless roaming of PDF tile maps. In the whole process of bu...

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Abstract

The invention relates to a PDF tile map and a manufacturing method. The PDF tile map stores map expressed graph information and interactive geographic information by adoption of a tile pyramid model in a PDF format, and has all the features of PDF maps. The manufacturing method mainly comprises the following steps of: firstly establishing a PDF tile map pyramid model; converting other projected PDF maps into Web Mercator projected PDF maps via projection; and finally clipping the Web Mercator projected PDF maps on the basis of the PDF tile map pyramid model, and splicing the PDF tile maps withsame tile coordinates to finally obtain a PDF tile map. The PDF tile map is not only capable of providing multi-stage grid tile map services, but also has a geographic element interaction ability, and is capable of seamlessly and organizationally managing PDF maps and providing multiple map visualization services to ensure that the using of the PDF maps is not limited by mapsheet any longer.

Description

technical field [0001] The invention belongs to the technical field of PDF maps, in particular to a PDF tile map and a production method. Background technique [0002] PDF (portable document format) is a widely used electronic document format developed and designed by Adobe. Its notable feature is that it can maintain the same display effect on different devices. GeoPDF is a registered trademark of TerraGo Technologies, a subsidiary of Layton Graphics, and is rapidly becoming the first format for map distribution. OGC has adopted GeoPDF as a recommended map coding standard. At present, the use of GeoPDF is based on a single image, and users can only be limited to one GeoPDF file when browsing GeoPDF, which is a big defect when using GeoPDF. PDF map is an important result of domestic research on Geospatial PDF, and its production and use are similar to GeoPDF. [0003] The map "tile" technology is the main way to solve the Internet map service so far. At present, the mainst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30
Inventor 周校东黄利民何列松谢鹏
Owner 中国人民解放军61540部队
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