create_beam: Create a beam starting from a central point
In JohMast/UrbanStars: Extract Statistics of Urban Centers

Description Usage Arguments Details Value Author(s) See Also Examples

View source: R/create_beam.R

Create a beam starting from a central point

1 2	create_beam(UrbanCenter, BeamWidth = 10000, BeamLength = 70000, NSegments = 10, OffAngle = 0)

`UrbanCenter`	a SpatialPoint object
`BeamWidth`	width of the beam in meters
`BeamLength`	length of the beam in meters
`NSegments`	number of segments of the beam
`OffAngle`	azimuth of the beam

This function creates a beam object starting from a given UrbanCenter. The returned Beam is a SpatialPolygonsDataFrame and is unprojected in WGS84 (EPSG:4326). It consists of NSegments equally sized polygons of length BeamLength/NSegments and width BeamWidth. The UrbanCenter lies on the midpoint of the innermost edge of the innermost segment. From there, the beam extends for BeamLength meters at a true-north-azimuth of OffAngle, the edges of the beam forming a geodesic between its corners.

SpatialPolygonsDataframe

Johannes Mast

create_beam, create_star_click, dest_point