smooth.hull.sp: Calculate a smooth hull around a set of points Calculate a...

In PacificCommunity/ofp-sam-vast-utils: Utility functions for applying VAST to analysis of WCPFC tuna fisheries data.

Description

Calculate a smooth hull around a set of points Calculate a smooth polygon around a set of points using Bezier curves, with the smooth polygon passing through the vertices of the convex hull containing the set of points once bezier control points are added the polygon is smoothed using chaikin's corner cutting algorithm add buffer if desired inspired by the following answers from stackexchange Dan H's answer: https://gis.stackexchange.com/questions/24827/smoothing-polygons-in-contour-map/24929#24929 John Hughes's answer: https://math.stackexchange.com/questions/656500/given-a-point-slope-and-a-distance-along-that-slope-easily-find-a-second-p https://stackoverflow.com/questions/42630703/create-buffer-around-spatial-data-in-r/42641283

Usage

smooth.hull.sp(pts, crs.ll, buffer.ll, d.scalar = 0.15)

Arguments

pts	List/Data Frame with two entries: one for x and one for y
crs.ll	Character string of the crs for the current lat-lon projections
buffer.ll	Size of buffer in degrees of lat/lon
d.scalar	ratio bounded by (0,0.5) and controls the tightness of smooth to the original chull points

Value

A spatial polygon object

PacificCommunity/ofp-sam-vast-utils documentation built on Nov. 2, 2020, 7:05 p.m.