Journal of Geo-information Science ›› 2016, Vol. 18 ›› Issue (4): 469-476.doi: 10.3724/SP.J.1047.2016.00469

• Orginal Article • Previous Articles     Next Articles

Principle and Methods on Layout Based Web Map Publishing Mode with Integrated Map Data and High Fidelity

LI Heyuan1(), LI Hongsheng2,*(), HAN Jiafu2, LUO Bin2   

  1. 1. Institute of Geospatial Information, Information Engineering University, Zhengzhou 450052, China
    2. State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China
  • Received:2015-11-03 Revised:2016-03-02 Online:2016-04-20 Published:2016-04-19
  • Contact: LI Hongsheng E-mail:2625845532@qq.com;lihongsheng@igsnrr.ac.cn

Abstract:

Based on the analysis of the status quo on web map publishing, particularly the status quo on thematic map publishing, a new concept of layout based web map was proposed. The layout based web map changes the GIS system tendency and static images map tendency of thematic map publishing. It provides the high fidelity map quality, meanwhile realizes the simultaneous publishing of thematic data and thematic map. This paper introduces the design and implementation techniques of the publish system on layout based web map. These techniques decompose the thematic map image and the polygon data into a quad-tree mode. On one hand, it divides the thematic map image into a map tile pyramid with given regular grid size. On the other hand, the thematic data features (mostly are the polygon features) are decomposed into grid dataset with variable resolution. It records every grid attribute based on a unique identification and stores the complex thematic data with information of its region, time, index and value as a data element, which increase the efficiency in thematic data query. In addition, this paper introduces two application scenarios. The first one is a topographic map document published in the EPS format. The second one is a layout based web map publishing system for the “Atlas on Population and Environment, People′s Republic of China”. A comparison of the merits and demerits was made among five web map publishing modes, including WebGIS, static images, PDF/GeoPDF map, SVG map and layout based web map. The layout based web map approach with high fidelity and interactive maps is considered to be promising for the digital thematic map publishing in the web mapping field.

Key words: layout based web map, quad-tree, integration map with data query, web map publish mode