Printing method of cross-panel pagination based on geographic pdf map

Abstract

The invention relates to a cross-frame paging printing method based on a geographic PDF map. The geographic PDF map data is preprocessed, so that the content of the geographic PDF map of adjacent map frames maintains the spatial reference consistency, and is selected based on the connection chart to be printed. The geographic PDF map data range, retrieve the geographic PDF map file, according to the set geographic PDF map printing layout and pagination printing parameters, use the set grid to extract the content corresponding to the geographic PDF map of different map sheets, supplemented by necessary elements , and paginate the output directly on the printer. This method has a large printing range, supports selecting a large range of map content across the map within the effective range of geographic PDF map data in the same projection zone, and prints it out, and it improves the efficiency of making large wall charts or paper atlases for later stitching and gluing. Page margin accuracy.

Description

technical field [0001] The invention belongs to the technical field of geographical PDF map drawing, and in particular relates to a method for printing cross-map pages and pages based on geographical PDF maps. Background technique [0002] Geographic PDF map is a new type of map product between traditional electronic map and paper map. It not only has the characteristics of stable and reliable surface effects of paper maps, but also has the characteristics of free zooming and query analysis of traditional electronic maps, and it can be independent of GIS system, and can be applied to professional and non-professional users at the same time. [0003] Ordinary geographic PDF maps are usually produced by frame, and each frame corresponds to a geographic PDF map file. For non-professional applications, any commercial software that can browse PDF files can basically print map pages directly, but it can't do anything for cross-frame printing of adjacent frames. As the scope of a...

AI Technical Summary

Problems solved by technology

It is mainly reflected in: 1) The content range of the geographical PDF map only occupies a part of the PDF page, and the PDF pages (or page images) cannot be directly stitched and printed across the frame; 2) The geographic PDF map contains the outer map outside the frame. Redundant decoration elements such as profile, map title, legend, scale, etc., cannot directly support the splicing and printing of map content in PDF pages across frames; 3) Geographic PDF maps may be generated through different processing methods, and the map pages of adjacent frames The spatial reference is not completely consistent. One of the most common problems is that after map projection, the geographic PDF map production process rotates the map appropriately to keep the content of the map surface and the visual level of the PDF page. At this time, forcibly cross the map Width splicing printing does not have a precise and unified spatial reference

[0004] Currently, none of the commercial software that supports PDF printing can directly support the page-by-page printing of geographic PDF maps

There are not many cases supporting the professional application of geographic PDF maps. GeoPDF in the United States (Layton Graphics of the United States developed GeoPDF produced by TerroGo Technologies]) and the research results of Hu Haojie and others (Research on key technologies for geographic PDF map mapping [D], Information Engineering University Master's Thesis, 2011, Zhengzhou) does not provide a solution to print directly across the map frame based on the geographic PDF map

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