IDR visor map: a simple and friendly geographical information system
نویسندگان
چکیده
Nowadays, the construction of a Geographical Information System on a commercial package takes up a great deal of time and resources. However, the distribution of such an application can be more expensive than the construction because of the need to distribute the commercial package with the application. Usually, commercial packages cover this lack by providing reduced versions from their powerful applications. With the IDR Visor Map we have developed a low-cost and at the same time powerful GIS which allows us to distribute GIS applications on a friendly workbench (Windows NT and 95). The IDR Visor Map has been developed using an object oriented paradigm (OO). This paper shows our experience in the design and implementation of a new GIS called IDR Visor Map, as well as some of its capabilities. The addition of some classes to the powerful Microsoft Foundation Classes (MFC) has developed this application. Such classes provide the layout to integrate and to monitor raster, polygon and vector images, a key aspect in the process of managing spatial information. This information is used together with the ODBC interface to obtain aditional data from a georeferenced database. The main advantages of the IDR Visor Map are scalability and flexibility, since our tool could be improved to offer the same capabilities that can be found in commercial GIS. On the other hand, the distribution of the IDR Visor Map tool has a minimal cost; furthermore, ad hoc applications can be easily implemented using our libraries. Our experience in this area says that a GIS, as the IDR Visor Map, must be able to answer all requests and demands from users, what means that features like flexibility and scalability must be taken into account in the construction of a GIS application. Transactions on Information and Communications Technologies vol 18, © 1998 WIT Press, www.witpress.com, ISSN 1743-3517
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