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In recent years, the related technologies of taking satellite images have accumulated very rapidly, causing the quality of image data display to be greatly improved. However, it also results in a strong need for a powerful system with high processing capabilities to process the attribute data and display images. Moreover, in order to manipulate file display and data query smoothly via WebGIS on the Internet, the performance of image processing under such an environment would be one of the toughest issues that is needed to overcome.
The goal of this application is to provide through the online Satellite Image Query System a way for the colleagues of the organization and users with special requests to perform image query, purchase, management and other functions according to the limited authority. Moreover, the system is equipped with an easy-to-use GIS interface to allow users to manipulate the map online. Besides the various functional manipulations of this system, since the image files processed by the system all are large in size, the enhancement of processing performance is also highly emphasized.
The applications of SuperGIS and SuperWebGIS
The operation of the system can be divided into two parts: image shooting scheduling as the system base and WebGIS manipulation as the system surface.
In the aspect of system base, with the characteristic of spatial data processing capability of SuperGIS, a scheduling function for taking surface images is then customized to arrange the shooting schedule for the images that users want to purchase.
As for the system surface on WebGIS manipulation, the program uses SuperWebGIS to build up an online system and adopts the Internet Map Cache Service of SuperWebGIS to handle the web images’ browsing speed. Besides, with the GIS manipulation functions provided by SuperWebGIS, users are enabled to run some simple GIS manipulations on the web.
Large data quantity and complex process flow are the difficulties that needed to be overcome in building up this system. Through planning and creating the customized functions, many complex procedures have been simplified. In addition, in order to make all the related databases work more effectively, those existing databases owned by related organizations, including Oracle and Sybase, are integrated together through GIS architecture;
