elSPDF {plotGoogleMaps} | R Documentation |
Create ellipses in form of SpatialPolygonsDataFrame based on attributes: semi-major axis, semi-minor axis, and orientation in degrees.
elSPDF(SPDF, zcol=1:3, scale_e=10)
SPDF |
object of SpatialPointsDataFrame-class with associated coordinate reference systems and minimum three attributes: semi-major axis, semi-minor axis, and orientation in degrees. |
zcol |
variable column names, or column numbers after removing spatial coordinates from x@data: 1 refers to the first non-coordinate column |
scale_e |
scale factor |
The function provide SpatialPolygonsDataFrame of ellipses.
Milan Kilibarda kili@grf.bg.ac.rs
pieSP, elSPDF, bubbleGoogleMaps
# Data preparation ell<- data.frame(E=c(7456263,7456489,7456305),N=c(4954146,4952978,4952695), A=c( 2.96,4.55,7.10),B=c(2.35,2.11,2.29), teta=c(28.35242,41.04491,38.47216)) coordinates(ell) <- ~E+N proj4string(ell) <- CRS("+proj=tmerc +lat_0=0 +lon_0=21 +k=0.9999 +x_0=7500000 +y_0=0 +ellps=bessel +towgs84=574.027,170.175,401.545,4.88786,-0.66524,-13.24673,0.99999311067 +units=m") ellpses<-elSPDF(ell) spplot(ellpses,"A")