Sciweavers

CSCW
1996
ACM
14 years 4 months ago
Re-place-ing Space: The Roles of Place and Space in Collaborative Systems
Many collaborative and communicative environments use notions of "space" and spatial organisation to facilitate and structure interaction. We argue that a focus on spati...
Steve R. Harrison, Paul Dourish
DBPL
1997
Springer
117views Database» more  DBPL 1997»
14 years 4 months ago
Degrees of Monotonicity of Spatial Transformations
We consider spatial databases that can be defined in terms of polynomial inequalities, and we are interested in monotonic transformations of spatial databases. We investigate a hi...
Bart Kuijpers
COSIT
1997
Springer
102views GIS» more  COSIT 1997»
14 years 4 months ago
Partition and Conquer
Abstract. Although maps and partitions are ubiquitous in geographical information systems and spatial databases, there is only little work investigating their foundations. We give ...
Martin Erwig, Markus Schneider
SPATIALCOGNITION
1998
Springer
14 years 4 months ago
The Impact of Exogenous Factors on Spatial Coding in Perception and Memory
In the course of acquiring knowledge about layouts and maps spatial information can undergo considerable changes and distortions, which systematically affect knowledge-based judgme...
Jörg Gehrke, Bernhard Hommel
KDD
1998
ACM
160views Data Mining» more  KDD 1998»
14 years 4 months ago
Algorithms for Characterization and Trend Detection in Spatial Databases
1 The number and the size of spatial databases, e.g. for geomarketing, traffic control or environmental studies, are rapidly growing which results in an increasing need for spatial...
Martin Ester, Alexander Frommelt, Hans-Peter Krieg...
ER
1998
Springer
115views Database» more  ER 1998»
14 years 4 months ago
Temporal Objects for Spatio-Temporal Data Models and a Comparison of Their Representations
Abstract: Currently, there are strong efforts to integrate spatial and temporal database technology into spatio-temporal database systems. This paper views the topic from a rather ...
Martin Erwig, Markus Schneider, Ralf Hartmut G&uum...
SSD
1999
Springer
106views Database» more  SSD 1999»
14 years 4 months ago
XZ-Ordering: A Space-Filling Curve for Objects with Spatial Extension
There is an increasing need to integrate spatial index structures into commercial database management systems. In geographic information systems (GIS), huge amounts of information ...
Christian Böhm, Gerald Klump, Hans-Peter Krie...
ISD
1999
Springer
262views Database» more  ISD 1999»
14 years 4 months ago
Spatial Pictogram Enhanced Conceptual Data Models and Their Translation to Logical Data Models
The successful development of any geographic information system project needs the careful design and implementation of spatial databases via conceptual and logical data-modeling. T...
Shashi Shekhar, Ranga Raju Vatsavai, Sanjay Chawla...
GIS
1999
ACM
14 years 4 months ago
Spatial Data Integrity Constraints in Object Oriented Geographic Data Modeling
An important activity in the design of a particular database application consists in identifying the integrity constraints that must hold on the database, and that are used to det...
Karla A. V. Borges, Alberto H. F. Laender, Clodove...
GIS
1999
ACM
14 years 4 months ago
Improved Bulk-Loading Algorithms for Quadtrees
Spatial indexes, such as the PMR quadtree, are important in spatial databases for efficient execution of queries involving spatial constraints, especially when the queries involv...
Gísli R. Hjaltason, Hanan Samet