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GMLLineString.R
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GMLLineString.R
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#' GMLLineString
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#' @keywords ISO GML LineString
#' @return Object of \code{\link{R6Class}} for modelling an GML linestring
#' @format \code{\link{R6Class}} object.
#'
#' @field posList
#'
#' @section Methods:
#' \describe{
#' \item{\code{new(xml, sfg)}}{
#' This method is used to instantiate a GML linestring
#' }
#' }
#'
#' @note Experimental
#'
#' @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>
#'
GMLLineString <- R6Class("GMLLineString",
inherit = GMLAbstractCurve,
private = list(
xmlElement = "LineString",
xmlNamespacePrefix = "GML"
),
public = list(
posList = matrix(NA_real_, 2, 2),
initialize = function(xml = NULL, sfg){
super$initialize(xml, element = private$xmlElement, wrap = TRUE)
if(is.null(xml)){
if(!all(sapply(c("sfg","XY", "LINESTRING"), function(x){is(sfg, x)}))) stop("Input 'sfg' object should be a 'linestring'")
m <- as.matrix(sfg)
self$posList <- m
self$setAttr("srsDimension", as.character(dim(m)[2]))
}
}
)
)