Indexing the Sphere with the Hierarchical Triangular Mesh

  title={Indexing the Sphere with the Hierarchical Triangular Mesh},
  author={Alexander S. Szalay and Jim Gray and George Fekete and Peter Z. Kunszt and Peter Kukol and Ani Thakar},
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-tree that is particularly good at supporting searches at different resolutions, from arc seconds to hemispheres. The subdivision scheme is universal, providing the basis for addressing and for fast lookups. The HTM provides the basis for an efficient geospatial indexing scheme in relational databases where the data… CONTINUE READING
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