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The Design and Implementation of National Economic and Social Statistical Electronic Atlas


4.3 Table Analysis
The module of “Table Analysis” includes following functions: link to map, custom indicator computer, statistical analysis, and export table. “Link to map” makes the selection of the table relate to map, so the selected indicators can be shown by “identify” on “Map Window”. “Custom indicator computer” allows the user to construct expression (or model) to generate custom indicator using existing indicators, arithmetic operators, and some basic math functions. “Statistical analysis” includes some basic statistical analysis, such as description analysis (includes mean, sum, Std. deviation, variance, minimum, maximum, median), correlation analysis, and cluster analysis.

4.4 Statistical Charts
Unlike a table, the most important function of a statistical chart is to convey information visually. A statistical chart is better than a table for displaying the structural aspects of data, summarizing large amounts of data, demonstrating how things are connected, communicating ideas and conclusions and setting up a situation or feeling. This module can draw most popular chart types, such as line charts, column and bar charts, pie charts. Many of these types have several subtypes. In addition, some less used, but highly informative, chart types are provided, such as area charts, doughnut charts, and radar charts.

4.5 Thematic Maps
A thematic map shows the spatial distribution of one or more specific data themes for spatial units or areas. Statistical thematic maps include a variety of different map types such as unique value maps, range maps, dot density maps, proportional symbol maps, and statistical graph maps. “Thematic map” allow the user to make these four types of thematic maps, and save, rename, modify, delete, export maps.


Fig.3 The flow chart of main functions

6 Conclusion
NESSEA is used to query, analyze and visualize statistical data both in traditional mode, including tables and charts, and GIS mode, such as maps and thematic maps. GIS plays an important role in this system to integrate statistical data in spatial information framework and visualize spatial characteristic of national economic and social phenomena by spatialization of the statistical data.

Reference
  • An K., and et al. A Study on the Construction of Gansu Statistical GIS. The 7th Annual Conference of China GIS Association, 2003, 598-602.
  • Zhang J.S., and et al. A Study on the Construction of Basic Unit GIS. The 7th Annual Conference of China GIS Association, 2003, 606-610.
  • Edelstein, Herb. “Unraveling Client Server Architectures.” DBMS 7, 5 (May 1994): 34(7).
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