wnCreateVectorMap: Make a vector map of observed or forecasted wind field
In nwagenbrenner/windtools: Tools to process and visualize wind data

Description Usage Arguments Details Value Examples

wnCreateVectorMap returns a ggmap object of the vector field

1 2	wnCreateVectorMap(df, lat, lon, zoom, maptype, colorscale = "discrete", axis_labels = TRUE, datatype = "observed")

`df`	dataframe
`lat`	center lat of Google Maps image
`lon`	center lon of Google Maps image
`zoom`	zoom for Google Maps image (1-20)
`maptype`	type of Google Maps image (terrain, hybrid, satellite, roadmap)
`colorscale`	color scale to use for vectors (discrete or continuous)
`axis_labels`	whether or not to plot axis labels on map (TRUE or FALSE)
`datatype`	data to display (obbserved or predicted)

This fucntion returns a vector plot of the wind field overlayed on a static Google Maps image. If multiple hours are supplied, the plot is faceted on the hour. Note that if more than 4-6 hours are requested this can take some time. Observed or predicted winds can be plotted.

ggmap object representation of the wind field

data(wind)
s <- subsetOnSpeed(wind, 'R2', '<', 6.0)
s.avg <- buildBiasHourlyAverages(s)
h <- c(0, 6, 12, 18)
s.hr <- subsetOnHour(s.avg, h)
m <- makeVectorMap(s.hr, 43.45, -113.15, 12, 'terrain')