create_star: Create a Star object around a central point

In JohMast/UrbanStars: Extract Statistics of Urban Centers

Description

Create a Star object around a central point

Usage

create_star(UrbanCenter, BeamWidth = 10000, BeamLength = 70000,
  NSegments = 10, NBeams = 8)

Arguments

UrbanCenter	a SpatialPoint object
BeamWidth	width of each beam in meters
BeamLength	length of each beam in meters
NSegments	number of segments of each beam
NBeams	the number of beams of the star

Details

This function creates a Star object around a given UrbanCenter. It consists of NBeams times NSegments equally sized polygons of length BeamLength/NSegments and width BeamWidth, arranged in NBeams equally spaced beams of length Beamlength. The returned Star is a SpatialPolygonsDataFrame and is unprojected in WGS84 (EPSG:4326). It contains a field "OverallId" which contains unique ids for each segment, the first 6 numbers indicating the beam, the latter 6 numbers indicating the segment.

Value

SpatialPolygonsDataframe

Author(s)

Johannes Mast

See Also

create_beam, create_star_click

Examples

create_star_click(UrbanCenter)

JohMast/UrbanStars documentation built on May 28, 2019, 8:58 p.m.