GIS applications to mobile devices are becoming i nc reasingly popular, utilizing a di-verserange of devices. Many of these devices suffer from serious constraints in three main areas: processor spee
Access control in multi-domain environments is one of the important questions of building coalition between domains.On the basis of RBAC access control model, t
This paper gives an overall introduction to the basic concept of LAC(location-aware computing) and its development status, puts forward an integrated location-a
In the automation of identification of landscape features the vagueness arises from the fact that the attributes and parameters that make up a landscape vary ov
The policy of the Chinese government concerning the horizontal expansion of the cultivated land through the reclamation of desert soils result in a total increa