Implementation of map amplitude splitting component (4) -- Concept of data-driven plotting

Map plotting has been around for a long time. Since Canadian Geographer Tom linsen Proposed digital plotting, it has continued to flourish until now. Computer Graphics is now a very conventional and recognized technical means, and a variety of computer graphics software emerge. Currently, the mainstream graphics software is still divided into two types: a type of drawing mode represented by AutoCAD and a type of drawing mode represented by ArcGIS. The similarities and differences between the two modes are that the data is collected based on actual geography. Cad focuses on the presentation style, while ArcGIS focuses on the analysis. Therefore, if the effects of graphs are emphasized, the CAD and cordraw types firmly occupy the dominant position of the plotting software. If the spatial analysis is emphasized, the ArcGIS creation of the Thematic Map is an inevitable choice. The huge advantage of caddy graphics makes it rule the field of large-scale graphics. At present, almost all the domestic plotting software with a scale greater than 50 thousand is caddy.

ESRI's rise in the graphic field is that after ArcObjects came out, the idea of Americans is different from that of the Chinese. Americans have a simple idea and a solution that cares about problems. For example, ESRI's specialized solution in the graphic field is plts. The core of plts is to map data (Geodatabase. Automated processing of plotting gives them a data-driven plotting solution. The essence of data-driven plotting is to map data based on its own characteristics, and to map data based on rules. This is the core of data-driven plotting. Therefore, in 9.2 ArcGIS, the graphic expression was also introduced. The goal of graphic expression is actually the difference between fuzzy and CAD. Combine rules to achieve the overall effect. Essentially, the graphic expression uses rules for data to drive the Drawing Engine to achieve automatic drawing results. Through attribute information, the relevant data types can automatically match the Symbol Information (or even more information than the symbol ).

The advantage of data-driven plotting is enormous. At present, various data submission methods of Chinese departments are moving closer to the GIS format, or the GIS data format standard has been adopted. There are more cases of direct data-based database creation, which cannot be done by CAD data, at least currently. In addition, the current GIS technology hotspot is the automatic incremental update of the existing database data. If this problem can be solved or become a conventional means, it not only saves costs but also improves efficiency. Data-driven plotting has a greater significance in this basic development. technologies such as automated plotting and image library integration will also be used more and more.

Reprinted Please note: http://blog.csdn.net/jx1228/archive/2011/05/13/6417906.aspx