For instance, queries from a web site can be handled by any database program as long as it can be linked to receive commands from a web server. Similarly, the database can send data and direct a charting program to produce a graph based on the query results and send the graph back to the user. Powerful GIS systems can be set up without the cost of purchasing and learning a dedicated GIS package. Web-Based GIS is not without its faults. The primary problem is speed, GIS relies on extensive use of graphics.
Connection speeds over the Internet can make heavy use of graphics intolerably slow for users.
Raster images are pixel based, where every point on the image has a pixel value that depends on is color. These images tend to be larger and more difficult to edit than vector-based images. Some of these shortcomings are being addressed by plug-ins for Netscape Navigator. On the other hand, web-based GIS does not require the same resources as these programs. Powerful computers, extensive training, and expensive site licenses are not required for a site wide GIS solution.