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#' GMLRectifiedGrid
#'
#' @docType class
#' @importFrom R6 R6Class
#' @export
#' @keywords ISO GML Grid
#' @return Object of \code{\link{R6Class}} for modelling an GML rectified grid
#' @format \code{\link{R6Class}} object.
#'
#' @section Methods:
#' \describe{
#' \item{\code{new(xml, element)}}{
#' This method is used to instantiate a GML rectified grid
#' }
#' \item{\code{setOrigin(x,y)}}{
#' Set the origin of the rectified grid
#' }
#' }
#'
#' @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>
#'
GMLRectifiedGrid <- R6Class("GMLRectifiedGrid",
inherit = GMLGrid,
private = list(
xmlElement = "RectifiedGrid",
xmlNamespacePrefix = "GML"
),
public = list(
#'@field origin origin
origin = NULL,
#'@field offsetVector offset vector
offsetVector = list(),
#'@description Initializes object
#'@param xml object of class \link{XMLInternalNode-class}
initialize = function(xml = NULL){
super$initialize(xml, element = private$xmlElement)
},
#'@description Set origin
#'@param x x
#'@param y y
setOrigin = function(x,y){
self$origin <- GMLPoint$new(sfg = sf::st_point(c(x,y)))
},
#'@description Adds offset vector
#'@param vec vec, object of class \link{vector}
#'@return \code{TRUE} if added, \code{FALSE} otherwise
addOffsetVector = function(vec){
if(!is.vector(vec)){ stop("Input should be a vector")}
if(length(vec)!=self$attrs$dimension){
stop(sprintf("Input vector length should equal to the number of dimensions",
self$attrs$dimension))
}
offsetVector <- GMLElement$create("offsetVector", list(matrix(vec,1,2)))
return(self$addListElement("offsetVector", offsetVector))
},
#'@description Deletes offset vector
#'@param vec vec, object of class \link{vector}
#'@return \code{TRUE} if deleted, \code{FALSE} otherwise
delOffsetVector = function(vec){
if(!is.vector(vec)){ stop("Input should be a vector")}
if(length(vec)!=self$attrs$dimension){
stop(sprintf("Input vector length should equal to the number of dimensions",
self$attrs$dimension))
}
offsetVector <- GMLElement$create("offsetVector", list(matrix(vec,1,2)))
return(self$delListElement("offsetVector", offsetVector))
}
)
)
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