Zheng X. Efficient Fourier transforms on hexagonal arrays[D]. Gainesville, FL: University of Florida, 2007.
[3]
Vince A. Indexing the aperture 3 hexagonal discrete global grid[J]. Journal of Visual communication and Image Representation, 2006,17:1227-1236.
[4]
Snyder W E, Qi H R, William S. A coordinate system for hexagonal pixels[EB/OL]. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.10.7937&rep=rep1&type=pdf, 1999.
[5]
Varberg D E. Pick's theorem revisited[J]. American Mathematical Monthly, 1985,92:584-587.
[6]
Grunbaum B, Shephard G C. Pick's theorem[J]. American Mathematical Monthly, 1993,100:150-161.
Tong X C, Ben J, Liu Y Y, et al. Modeling and expression of vector data in the hexagonal discrete global grid system[C]. In: International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences,Volume XL-4/W2, 2013:15-25.
Goodchild M. Discrete global grids for digital earth[C]. In: International Conference on Discrete Global Grids, California: Santa Barbara, 2000.
[13]
Sahr K, White D, Kimerling A J. Geodesic discrete global grid systems[J]. Cartography and Geographic Information Science, 2003,30(2):121-134.
[14]
Vince A, Zheng X. Arithmetic and Fourier transform for the PYXIS multi-resolution digital earth model[J]. International Journal of Digital Earth, 2009,2(1):59-79.
[15]
Zhou M Y, Chen J, Gong J Y. A pole-oriented discrete global grid system: Quaternary quadrangle mesh[J]. Computers & Geosciences, 2013,61:133-143.
[16]
Tong X C, Ben J, Wang Y, et al. Efficient encoding and spatial operation scheme for aperture 4 hexagonal discrete global grid system[J]. International Journal of Geographical Information Science, 2013,27(5):898-921.
[17]
Mahdavi A, Harrison E, Samavati F. Hexagonal connectivity maps for digital earth[J]. International Journal of Digital Earth, 2014, doi:10.1080/17538947:927597.
[18]
Snyder P. An equal-area map projection for polyhedral globes[J]. Cartographica, 1992,29(1):10-21.
[19]
Dutton G. A hierarchical coordinate system for geoprocessing and cartography[M]. Berlin: Springer-Verlag, 1999.
[20]
Gregory M J, Kimerling J A, White D, et al. A comparison of intercell metrics on discrete global grid systems[J]. Computers, Environment and Urban Systems, 2008,32(3):188-203.