Sciweavers

GIS
1998
ACM
13 years 11 months ago
Natural-Language Spatial Relations Between Linear and Areal Objects: The Topology and Metric of English-Language Terms
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...
A. Rashid B. M. Shariff, Max J. Egenhofer, David M...
GIS
1998
ACM
13 years 11 months ago
Aoristic Crime Analysis
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...
Jerry H. Ratcliffe, Michael J. McCullagh
GIS
1998
ACM
13 years 11 months ago
Mean-Variance Analysis of the Performance of Spatial Ordering Methods
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...
Akhil Kumar, Waleed A. Muhanna, Raymond A. Patters...
GIS
1998
ACM
13 years 11 months ago
A Geographical Information System for a GPS Based Personal Guidance System
Reginald G. Golledge, Roberta L. Klatzky, Jack M. ...
GIS
1998
ACM
13 years 11 months ago
Accuracy of Local Topographic Variables Derived from Digital Elevation Models
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...
Igor v. Florinsky
GIS
1998
ACM
13 years 11 months ago
Road Collapse in Magnum
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...
Annita N. Wilschut, Roelof van Zwol, Jan Flokstra,...
GIS
1998
ACM
14 years 3 months ago
Abstract and Discrete Modeling of Spatio-Temporal Data Types
Martin Erwig, Ralf Hartmut Güting, Markus Sch...
GIS
1998
ACM
14 years 3 months ago
Matching and Aligning Features in Overlayed Coverages
J. Mark Ware, Christopher B. Jones