road transportation by way of automobiles is a very convenient means of transportation. today, the most detrimental consequence of developing transportation systems in a country is traffic accident that places a huge financial burden on society. this paper investigates the role of information systems in transportation safety that leads to improved planning and operation of the transportation sy...

The National Historical Geographic Information System (NHGIS) is a five-year NSF-funded project designed to create a comprehensive U.S. census database—at the census tract and county level—for both the geographical and attribute data. Technological change presents an unprecedented opportunity to make these data readily available for social science research; thus bringing the complete census wit...

The geographic distribution of Astragalus L. (Fabaceae) was analyzed using a database of 12377 geo-referenced observations. In the old world (including Asia, Africa and Europe) there are ca. 2900 euploid species classified in 166 distinct sections. In this study using geographic information system (GIS) by means of DIVA-GIS (ver. 4) distribution map of some more important sections in the old wo...