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Some philosophical babbling about terrain modeling One way to define the "GIS terrain modeling problem" is to say how it is different from the modeling problems that ...
Here are the resources for GravityModeling from the meeting at UMSL with the NGA specialists in gravity models. Resources Powerpoint slides GravitySuccess.ppt: Jack ...
Here is Wenjie's implementation of refinement operators for 1-d splines coming from the theory of meshless wavelets. These are for an approximating, not an interpolating ...
Suppose that you want to send someone a sequence of points that determines a terrain. You'd like to send the most important points first. How do we order points from ...
Shortest Paths on a TIN Example of Sack and Lanthier's work: http://doi.acm.org/10.1145/262839.262984 See the images on this page of Mark Lanthier. ShortestPathComparison ...
Note: This is not part of the Geo project, but topical. People At a Dagstuhl seminar in October 2003, Lars Kulik asked whether efficient line simplification could ...
TOC Simplex Splines Simplex splines generalize the familiar B-splines in one dimension. A k degree B-spline basis is defined for a set of k+2 points in R called knots ...
Using Leonard's results and thoughts on TerrainRepsFromSVD, we can come up with some "compressed" representations of terrain by performing an off-line SVD for large ...
Streaming Compression The idea of streaming meshes is to organize the data structure so that a large mesh can be accessed seamlessly by a fixed traversal while keeping ...
Pipelining streaming points, triangles, and lines 3DPVT submission by Martin Isenburg, Yuanxin (Leo) Liu, and Jack Snoeyink. This paper emphasizes the pipeline processing ...
TINs or Triangulated Irregular Networks, are simple piecewise linear representations of terrain as a mesh of triangles. Main.JackSnoeyink 08 Feb 2005
Leonard has a brief powerpoint presentation on using Singular Value Decomposition to represent terrain as a sum of vector product surfaces. DARPA GIS.ppt He observes ...
VIP insertion heuristic generates an approximate terrain surface (usually triangulated as a TIN) from an input set of sample data (points (x,y) with elevations). The ...
By analogy with WaterShed, which is the region that drains into a given point, the geographers talk about a viewshed as the region that is visible from a point. Can ...
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