Description Usage Arguments Value Author(s) See Also Examples
View source: R/geo_trivial_circle.R
Generates a center point and radius that represent the smallest circle that contains up to three input points
1 | geo_trivial_circle(coordinate_matrix, ...)
|
coordinate_matrix |
A matrix of latitude and longitude columns and up to three rows |
... |
'alternative' argument to be used when calling |
Returns a list of three elements named radius, center and making. Radius contains a single value representing the circle radius. Center contains a vector of length 2 representing the circle center latitude and longitude. Making contains a matrix of the latitude and longitude points were used as the coordinate_matrix argument.
Shant Sukljian
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | # Load required packages
require(mapview)
require(sp)
# Create sample geo dataset
sample_coord <-
matrix(
c(
sample(327131680:419648450, 3) / 10000000,
sample(-1147301410:-1241938690, 3) / 10000000
),
ncol = 2
)
# Generate sed center and radius
gtc <- geo_trivial_circle(sample_coord)
# Create 80 sided polygon based on gtc's center and radius
gtc_poly <- geo_surround_poly(gtc$center, gtc$radius, 80)
# Join all the points into a single matrix
bound_poly <- rbind(sample_coord, gtc$center, gtc_poly)
# Create SpacialPoints object and pass to mapview for visualization
mapview(
SpatialPoints(
bound_poly[,c(2, 1)],
proj4string = CRS("+proj=longlat +datum=WGS84")
)
)
|
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