In order to determine the antenna downtilt angles for the cells in the base station planning work of GSM system

the antenna downtilt angle calculation software for GSM cell utilizing geographic information system is developed.During the development

the powerful geographic display and operation function of GIS are integrated into the software using the OLE automation method and MapInfo callback function.The software includes all the procedures from data preparation

map generation

downtilt angle calculation to saving the results

thus the automatic maintenance of downtilt angle data is realized.The application indicates that the software supports the base station planning work of GSM system well in the engineering.