circularity index
circularity index
1. The ratio between the area of an inscribed circle to the area of a circumscribed circle fitted to the outline of the crest of a crater (see CRATER (2)). For fresh lunar craters, the average circularity index reaches a maximum value of about 0.85–0.90 for craters about 10 km in diameter.
2. See DRAINAGE BASIN SHAPE INDEX.
1. The ratio between the area of an inscribed circle to the area of a circumscribed circle fitted to the outline of the crest of a crater (see CRATER (2)). For fresh lunar craters, the average circularity index reaches a maximum value of about 0.85–0.90 for craters about 10 km in diameter.
2. See DRAINAGE BASIN SHAPE INDEX.
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circularity index