Related Links

Global gridding:

• The First International Conference on DGGs and an associated on-line book.
• The Second International Conference on DGGs
• Spatial Effects. The home of Geoff Dutton’s octahedron-based QTM DGG.
• Geodyssey Limited The home of Hipparchus, a commercial GIS that allows arbitrary DGG construction.
• HEALPix Aperture 4 diamond DGGS on the octahedron.
• NESDIS National Geophysical Data Center Source of the ETOPO5 digital elevation model used for some illustrations on our site

Planar hexagonal grids:

• Amit Patel’s hex grid game programming link

Non-STCL Software:

• PROJ.4: Cartographic Projections library which contains the ISEA projection and aperture 3 and 4 hexagon binning with DGGRID address types (thanks to Nathan Wagner).
• Spherekit: An integrated toolkit for spatial interpolation and comparison of spatial interpolation algorithms.