create_star_click: Create a Star by clicking on a base raster
In JohMast/UrbanStars: Extract Statistics of Urban Centers

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

View source: R/create_star_click.R

Create a Star by clicking on a base raster

1 2	create_star_click(BaseRaster, BeamWidth = 1000, BeamLength = 50000, NSegments = 50, NBeams = 8)

`BaseRaster`	a RasterLayer to be clicked on
`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

This function plots a BaseRaster and, on click(), creates a Star object around the clicked point. 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 takes the CRS of the BaseRaster. 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.

SpatialPolygonsDataframe

Johannes Mast

create_beam, create_star