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GIS
1992
ACM
15 years 8 months ago
Machine Induction of Geospatial Knowledge
Machine learning techniques such as tree induction have become accepted tools for developing generalisations of large data sets, typically for use with production rule systems in p...
Peter A. Whigham, Robert I. McKay, J. R. Davis
SIGGRAPH
1994
ACM
15 years 8 months ago
The irradiance Jacobian for partially occluded polyhedral sources
The irradiance at a point on a surface due to a polyhedral source of uniform brightness is given by a well-known analytic formula. In this paper we derive the corresponding analyt...
James Arvo
SSD
1993
Springer
152views Database» more  SSD 1993»
15 years 8 months ago
Realms: A Foundation for Spatial Data Types in Database Systems
: Spatial data types or algebras for database systems should (i) be fully general (which means, closed under set operations, hence e.g. a region value can be a set of polygons with...
Ralf Hartmut Güting, Markus Schneider
VLDB
1994
ACM
137views Database» more  VLDB 1994»
15 years 8 months ago
Performance of Data-Parallel Spatial Operations
The performance of data-parallel algorithms for spatial operations using data-parallel variants of the bucket PMR quadtree, R-tree, and R+-tree spatial data structures is compared...
Erik G. Hoel, Hanan Samet
VLDB
1994
ACM
119views Database» more  VLDB 1994»
15 years 8 months ago
Bulk Loading into an OODB: A Performance Study
Object-oriented database OODB users bring with them large quantities of legacy data megabytes and even gigabytes. In addition, scienti c OODB users continually generate new data. ...
Janet L. Wiener, Jeffrey F. Naughton
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