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#' GMLAbstractGeometry
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#' @keywords ISO GML Geometry
#' @return Object of \code{\link{R6Class}} for modelling an GML abstract Geometry
#' @format \code{\link{R6Class}} object.
#'
#' @references
#' ISO 19136:2007 Geographic Information -- Geographic Markup Language.
#' http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=32554
#'
#' OGC Geography Markup Language. http://www.opengeospatial.org/standards/gml
#'
#' @author Emmanuel Blondel <emmanuel.blondel1@@gmail.com>
#'
GMLAbstractGeometry <- R6Class("GMLAbstractGeometry",
inherit = GMLAbstractGML,
private = list(
xmlElement = "AbstractGeometry",
xmlNamespacePrefix = "GML"
),
public = list(
#'@description Initializes object
#'@param xml object of class \link{XMLInternalNode-class}
#'@param element element name
#'@param attrs list of attributes
#'@param defaults list of default values
#'@param wrap wrap element?
initialize = function(xml = NULL, element = NULL, attrs = list(), defaults = list(), wrap = TRUE){
if(is.null(element)) element <- private$xmlElement
super$initialize(xml, element = element, attrs = attrs, defaults = defaults, wrap = wrap)
if(!require("sf")){
stop("Creating GML geometry objects require 'sf' package")
}
}
)
)
GMLAbstractGeometry$fromSimpleFeatureGeometry = function(sfg){
if(!is(sfg, "sfg")) stop("Input 'sfg' should be a of class 'sfg' (Simple Feature Geometry)")
newvalue <- switch(class(sfg)[2],
"POINT" = GMLPoint$new(sfg=sfg),
"LINESTRING" = GMLLineString$new(sfg=sfg),
"POLYGON" = GMLPolygon$new(sfg=sfg)
)
return(newvalue)
}
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