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Convert a bounding box to POLYGON in OGC WKT format

Source: R/RcppExports.R
bbox_to_wkt.Rd

bbox_to_wkt() returns a WKT POLYGON string for the given bounding box. Requires GDAL built with the GEOS library.

Usage

bbox_to_wkt(bbox, extend_x = 0, extend_y = 0)

Arguments

bbox

Numeric vector of length four containing xmin, ymin, xmax, ymax.

extend_x

Numeric scalar. Distance in units of bbox to extend the rectangle in both directions along the x-axis (results in xmin = bbox[1] - extend_x, xmax = bbox[3] + extend_x).

extend_y

Numeric scalar. Distance in units of bbox to extend the rectangle in both directions along the y-axis (results in ymin = bbox[2] - extend_y, ymax = bbox[4] + extend_y).

Value

Character string for an OGC WKT polygon. NA is returned if GDAL was built without the GEOS library.

See also

bbox_from_wkt(), g_buffer()

Examples

elev_file <- system.file("extdata/storml_elev.tif", package="gdalraster")
ds <- new(GDALRaster, elev_file, read_only=TRUE)
bbox_to_wkt(ds$bbox())
#> [1] "POLYGON ((323476.071970863 5101871.98303138,327766.071970863 5101871.98303138,327766.071970863 5105081.98303138,323476.071970863 5105081.98303138,323476.071970863 5101871.98303138))"
ds$close()