Composite grid of data sets at original survey
elevations
Grid continued to 1,000 ft above terrain
using chessboard method
Grid continued to 1,000 ft above terrain
using Xia-m method
Grid of two eastern surveys (M and O) at
8,500 ft barometric elevation
Grid of four western surveys (C, H, I, and J)
at 9,000 ft barometric elevation
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