private void WriteLineString(LineString linestring, XmlWriter xmlWriter)
{
if (linestring.Vertices != null && linestring.Vertices.Count >= 2)
{
if (!linestring.Vertices[0].Altitude.HasValue)
{
//<georss:line>46.28548 -122.25302 46.28489 -122.25492</georss:line>
xmlWriter.WriteStartElement("line", GeoRssNamespace);
WriteCoordinateCollection(linestring.Vertices, xmlWriter);
xmlWriter.WriteEndElement();
}
else
{
//<georss:where>
// <gml:LineString>
// <gml:posList dimension="2">
// 14.35954 100.57967
// 14.35871 100.57337
// </gml:posList>
// </gml:LineString>
//</georss:where>
xmlWriter.WriteStartElement("where", GeoRssNamespace);
Gml.CreateLineString(linestring, xmlWriter);
xmlWriter.WriteEndElement();
}
}
}
private void WritePolygon(Polygon polygon, XmlWriter xmlWriter)
{
if (polygon.ExteriorRing != null && polygon.ExteriorRing.Count >= 2)
{
bool hasAltitude = polygon.ExteriorRing[0].Altitude.HasValue;
if (!hasAltitude && (polygon.InteriorRings == null || polygon.InteriorRings.Count == 0))
{
//<georss:polygon>46.31409 -122.22616 46.31113 -122.22968 46.31083 -122.23320</georss:polygon>
xmlWriter.WriteStartElement("polygon", GeoRssNamespace);
WriteCoordinateCollection(polygon.ExteriorRing, xmlWriter);
xmlWriter.WriteEndElement();
}
else
{
//<georss:where>
// <gml:Polygon>
// <gml:exterior>
// <gml:LinearRing>
// <gml:posList>
// -71.106216 42.366661
// -71.105576 42.367104
// -76.104378 42.367134
// -71.106216 42.366661
// </gml:posList>
// </gml:LinearRing>
// </gml:exterior>
// </gml:Polygon>
//</georss:where>
xmlWriter.WriteStartElement("where", GeoRssNamespace);
Gml.CreatePolygon(polygon, xmlWriter);
xmlWriter.WriteEndElement();
}
}
}
private async Task <Geometry> ParseGeoRSSItem(XElement node, string baseUri, Dictionary <string, ShapeStyle> styles)
{
Geometry geom = null;
var metadata = new ShapeMetadata();
string nodeName, styleKey = null, id = string.Empty;
double tLat = double.NaN, tLon = double.NaN;
var mapPointNS = XNamespace.Get(MapPointNamespace);
var gmlNS = XNamespace.Get(GmlNamespace);
var geoNS = XNamespace.Get(GeoNamespace);
foreach (var n in node.Elements())
{
nodeName = n.Name.LocalName;
if (n.Name.Namespace == geoRssNS)
{
switch (nodeName)
{
case "point":
case "line":
case "polygon":
case "circle":
var polyCoords = ParseCoordinates(n);
geom = await ParseGeometry(n);
break;
case "where":
var g = await Gml.Parse(n, optimize, tolerance);
if (g != null)
{
geom = g;
}
break;
default:
break;
}
}
else if (n.Name.Namespace == gmlNS)
{
var gm = await Gml.Parse(node, optimize, tolerance);
if (gm != null)
{
geom = gm;
}
}
else if (n.Name.Namespace == mapPointNS && string.Compare(nodeName, "icon", StringComparison.OrdinalIgnoreCase) == 0)
{
var s = XmlUtilities.GetString(n, stripHtml);
if (!string.IsNullOrWhiteSpace(s))
{
var uri = CleanUri(s, baseUri);
if (uri != null)
{
//Extract embedded Style
styleKey = "embeddedStyle_" + embeddedStyleCnt;
embeddedStyleCnt++;
if (!styles.ContainsKey(styleKey))
{
styles.Add(styleKey, new ShapeStyle()
{
IconUrl = uri
});
}
}
}
}
else if (n.Name.Namespace == geoNS)
{
switch (nodeName)
{
case "lat":
tLat = XmlUtilities.GetDouble(n, double.NaN);
if (!double.IsNaN(tLat))
{
if (!double.IsNaN(tLon))
{
geom = new Point(tLat, tLon);
}
}
break;
case "lon":
case "long":
tLon = XmlUtilities.GetDouble(n, double.NaN);
if (!double.IsNaN(tLon))
{
if (!double.IsNaN(tLat))
{
geom = new Point(tLat, tLon);
}
}
break;
case "point":
tLat = XmlUtilities.GetDouble(n, "lat", double.NaN);
tLon = XmlUtilities.GetDouble(n, "long", double.NaN);
if (!double.IsNaN(tLat) && !double.IsNaN(tLon))
{
geom = new Point(tLat, tLon);
}
break;
default:
break;
}
}
else
{
switch (nodeName)
{
case "title":
metadata.Title = XmlUtilities.GetString(n, stripHtml);
break;
case "description":
metadata.Description = XmlUtilities.GetString(n, stripHtml);
break;
case "content":
case "summary":
SetMetadataString(metadata, nodeName, n, stripHtml);
break;
case "id":
metadata.ID = XmlUtilities.GetString(n, stripHtml);
break;
case "icon":
var s = XmlUtilities.GetString(n, stripHtml);
if (!string.IsNullOrWhiteSpace(s))
{
var uri = CleanUri(s, baseUri);
if (uri != null)
{
//Extract embedded Style
styleKey = "embeddedStyle_" + embeddedStyleCnt;
embeddedStyleCnt++;
if (!styles.ContainsKey(styleKey))
{
styles.Add(styleKey, new ShapeStyle()
{
IconUrl = uri
});
}
}
}
break;
case "link":
var href = XmlUtilities.GetStringAttribute(n, "href");
if (!string.IsNullOrWhiteSpace(href) && !metadata.Properties.ContainsKey(nodeName))
{
metadata.Properties.Add(nodeName, href);
}
break;
case "updated":
var time = XmlUtilities.GetDateTime(n);
if (time.HasValue && !metadata.Properties.ContainsKey(nodeName))
{
metadata.Properties.Add(nodeName, time);
}
break;
default:
break;
}
}
}
if (geom != null)
{
if (metadata.HasMetadata())
{
geom.Metadata = metadata;
}
geom.StyleKey = styleKey;
}
return(geom);
}