• Publications
  • Influence
Siting Observers on Terrain
This paper presents an experimental study of a new algorithm that synthesises separate programs, for fast viewshed, and for fast approximate visibility index determination. It has been implemented inExpand
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Cracking, damage and fracture in four dimensions
Concrete and cracking are nearly synonymous despite our best efforts and intentions. Relationships between cracking and the stress states that lead to cracking can be instructive. In an effort toExpand
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UNIFORM GRIDS: A TECHNIQUE FOR INTERSECTION DETECTION ON SERIAL AND PARALLEL MACHINES
TLDR
Data structures which accurately determine spatial and topological relationships in large databases are crucial to future developments in automated cartography. Expand
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Augmenting Grid-Based Contours to Improve Thin-Plate DEM Generation
We present two new pre-processing techniques that improve thin plate Digital Elevation Model (DEM) approximations from grid-based contour data. One method computes gradients from an initialExpand
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Compressing terrain elevation datasets
TLDR
A novel compression scheme named Overdetermined Compression (ODETCOM) for 16 bit Digital Elevation Models (DEMs) is proposed. Expand
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Completing Fragmentary River Networks via Induced terrain
Fragmentary river segments have to be reconnected before addressing various routing and tracking problems. Elevation determines drainage directions, so the partial heights available through LiDAR mayExpand
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Geometric computing and uniform grid technique
TLDR
In this paper, the uniform grid and a diverse set of geometric algorithms that are all based on it are reviewed. Expand
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Efficiency of Uniform Grids for Intersection Detection on Serial and Parallel Machines
TLDR
An exhaustive analysis of the uniform grid data structure for determining intersections in a set of many small line segments is presented. Expand
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Applications of Analytical Cartography
Several applications of analytical cartography are presented. They include terrain visibility (including visibility indices, viewsheds, and inter-visibility), map overlay (including solving round-offExpand
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Problems with raster graphics algorithms
TLDR
Assorted unusual problems with raster graphics digitization or scan conversion algorithms, where the implementation is much harder than the concept. Expand
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