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Fig. 12 | Malaria Journal

Fig. 12

From: How many holes is too many? A prototype tool for estimating mosquito entry risk into damaged bed nets

Fig. 12

Irregularly shaped hole against a ½ cm grid template illustrating two methods of estimating hole area and effective perimeter. A. Fitted polygon (in GeoGebra)—estimated area 1378 mm2, actual perimeter = 293 mm, convex hull-estimated effective perimeter = 276 mm. B. Estimated dimensions from an ellipse (major axis = 135 mm, minor axis = 17 mm) superimposed on the hole—perimeter ~279 mm, area = 1802 mm2

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