GIS
1998
ACM
13 years 4 months ago
1998
ACM
Spatial relations are the basis for many selections users perform when they query geographic information systems (GISs). Although such query languages use natural-language-like te...
GIS
1998
ACM
13 years 4 months ago
1998
ACM
Abstract. Crime pattern analysis has tended to focus on `hotspot’ analysis techniques; the identi® cation of areas with higher densities of criminal activity. This paper documen...
GIS
1998
ACM
13 years 4 months ago
1998
ACM
Geographical Information Systems (GIS) involve the manipulation of large spatial data sets, and the performance of these systems is often determined by how these data sets are orga...
GIS
1998
ACM
13 years 4 months ago
1998
ACM
GIS
1998
ACM
13 years 4 months ago
1998
ACM
We study the accuracy of data on some local topographic attributes derived from digital elevation models (DEMs). First, we carry out a test for the precision of four methods for ca...
GIS
1998
ACM
13 years 4 months ago
1998
ACM
GIS
1998
ACM
13 years 4 months ago
1998
ACM
This paper describes the implementation of a triangulation based collapse algorithm in the general-purpose object oriented DBMS Magnum. The contribution of the paper is twofold. F...
GIS
1998
ACM
13 years 4 months ago
1998
ACM
GIS
1998
ACM
13 years 8 months ago
1998
ACM
GIS
1998
ACM
13 years 8 months ago
1998
ACM
