/// <summary>
        /// Parse a tree from a string line to a new List item containing the following ; seperated fields:
        /// OBJECTNUMMER;Soortnaam_NL;Boomnummer;Soortnaam_WTS;Boomtype;Boomhoogte;Plantjaar;Eigenaar;Beheerder;Categorie;SOORT_KORT;SDVIEW;RADIUS;WKT_LNG_LAT;WKT_LAT_LNG;LNG;LAT;
        /// </summary>
        /// <param name="line">Text line matching the same fields as the header</param>
        private void ParseTree(string line)
        {
            string[] cell = line.Split(';');

            Tree newTree = new Tree()
            {
                OBJECTNUMMER  = cell[0],
                Soortnaam_NL  = cell[1],
                Boomnummer    = cell[2],
                Soortnaam_WTS = cell[3],
                Boomtype      = cell[4],
                Boomhoogte    = cell[5],
                Plantjaar     = int.Parse(cell[6]),
                Eigenaar      = cell[7],
                Beheerder     = cell[8],
                Categorie     = cell[9],
                SOORT_KORT    = cell[10],
                SDVIEW        = cell[11],
                RADIUS        = cell[12],
                WKT_LNG_LAT   = cell[13],
                WKT_LAT_LNG   = cell[14],
                LNG           = double.Parse(cell[15]),
                LAT           = double.Parse(cell[16])
            };

            //Extra generated tree data
            newTree.RD                = CoordConvert.WGS84toRD(newTree.LNG, newTree.LAT);
            newTree.position          = CoordConvert.WGS84toUnity(newTree.LNG, newTree.LAT);
            newTree.averageTreeHeight = EstimateTreeHeight(newTree.Boomhoogte);
            newTree.prefab            = FindClosestPrefabTypeByName(newTree.Soortnaam_NL);

            trees.Add(newTree);
        }
        /// <summary>
        /// uses CameraExtent
        /// updates the variable viewrange
        /// updates the variable cameraPositionRD
        /// updates the variable cameraPosition
        /// </summary>
        private Vector4 GetViewRange(ICameraExtents cameraExtents)
        {
            var     bottomLeft = CoordConvert.WGS84toRD(cameraExtents.GetExtent().MinX, cameraExtents.GetExtent().MinY);
            var     topRight   = CoordConvert.WGS84toRD(cameraExtents.GetExtent().MaxX, cameraExtents.GetExtent().MaxY);
            Vector4 viewRange  = new Vector4();

            viewRange.x = (float)bottomLeft.x;
            viewRange.y = (float)bottomLeft.y;
            viewRange.z = (float)(topRight.x - bottomLeft.x);
            viewRange.w = (float)(topRight.y - bottomLeft.y);

            return(viewRange);
        }