Assertion: curvature's curvature | /r/CapableOf | equate to convex forms
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Source sentences:
text: GIS packages, such as ArcGIS, may multiply curvature values by ‑100 for convenience, as recommended by Zeverbergen and Thorne (1987), to give values in the approximate range [‑1,1] with a sign that ensures that positive curvature equates to convex forms and negative curvature equates to concave forms.