Document Type : Research Paper

Author

• Alireza Azmudeh Ardalaan

Abstract

The Geographic Information System (GIS) includes a set of spatial and non-spatial data that is presented based on specific analyses. In designing the mutual communication of such systems with the user, it is necessary to observe various principles in the use of maps, tables and verbal logs.
Due to the different characteristics of spatial and non-spatial data, demanding a certain task from system requires use of words and tool of reference. This necessitates access to a visual-verbal system of communication to select various subjects on the map.