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| i2xy | Convert (x,y)-coordinates to single-number indices and back. |
| mapping50kxba240hsgencodegcdf | mapping50kxba240hsgencodegcdf |
| mapping50kxba240hsgencodegdim | mapping50kxba240hsgencodegdim |
| xy2i | Convert (x,y)-coordinates to single-number indices and back. |