98 citations · 132 across the 3 of their papers we have counts for
3 papers
Indexing the Sphere with the Hierarchical Triangular Mesh
Alexander S. Szalay, Jim Gray, George Fekete +3
We describe a method to subdivide the surface of a sphere into spherical triangles of similar, but not identical, shapes and sizes. The Hierarchical Triangular Mesh (HTM) is a quad…
Using Table Valued Functions in SQL Server 2005 To Implement a Spatial Data Library
Jim Gray, Alex Szalay, Gyorgy Fekete
This article explains how to add spatial search functions (point-near-point and point in polygon) to Microsoft SQL Server 2005 using C# and table-valued functions. It is possible t…
There Goes the Neighborhood: Relational Algebra for Spatial Data Search
Jim Gray, Alexander S. Szalay, Aniruddha R. Thakar +5
We explored ways of doing spatial search within a relational database: (1) hierarchical triangular mesh (a tessellation of the sphere), (2) a zoned bucketing system, and (3) repres…