as.SpatialPolygons.bbox: Convert a bounding box to a SpatialPolygons object Bounding...

In gsk3/taRifx.geo: Collection of various spatial functions

Description

Convert a bounding box to a SpatialPolygons object Bounding box is first created (in lat/lon) then projected if specified

Usage

as.SpatialPolygons.bbox(bbox,
  proj4stringFrom = sp::CRS("+proj=longlat +datum=WGS84"),
  proj4stringTo = NULL, interpolate = 0)

Arguments

bbox	Bounding box: a 2x2 numerical matrix of lat/lon coordinates (rownames must be c('lat','lon') and colnames must be c('min','max'))
proj4stringFrom	Projection string for the current bbox coordinates (defaults to lat/lon, WGS84)
proj4stringTo	Projection string, or NULL to not project
interpolate	If nonzero, the number of nodes per side to add in (helps maintain coverage if you're projecting)

Value

A SpatialPolygons object of the bounding box

See Also

clipToExtent which uses the output of this to clip to a bounding box

Examples

bb <- matrix(c(3,2,5,4),nrow=2)
rownames(bb) <- c("lon","lat")
colnames(bb) <- c('min','max')
as.SpatialPolygons.bbox( bb )

gsk3/taRifx.geo documentation built on May 17, 2019, 8:56 a.m.