/// <summary>
/// Load reads map information from a xml file
/// </summary>
/// <param name="filename"></param>
/// <returns></returns>
public bool Load(string filename)
{
Xdoc = XDocument.Load(filename);
if (!Xdoc.Equals(null))
{
double left = Convert.ToDouble(Xdoc.Root.Element("bounds").Attribute("minlon").Value);
double top = Convert.ToDouble(Xdoc.Root.Element("bounds").Attribute("maxlat").Value);
double right = Convert.ToDouble(Xdoc.Root.Element("bounds").Attribute("maxlon").Value);
double bottom = Convert.ToDouble(Xdoc.Root.Element("bounds").Attribute("minlat").Value);
Tile = new TileBound(MercatorHelper.ToMeters(top, left), MercatorHelper.ToMeters(bottom, right));
return(true);
}
return(false);
}
/// <summary>
/// BBox gets map information for the geo location
/// </summary>
/// <param name="left"></param>
/// <param name="bottom"></param>
/// <param name="right"></param>
/// <param name="top"></param>
/// <param name="err"></param>
/// <returns></returns>
public bool BBox(double left, double bottom, double right, double top, out string err)
{
var mapRequest = OsmMapUrl + "bbox=" + left.ToString() + "," + bottom.ToString() + "," + right.ToString() + "," + top.ToString();
Xdoc = Request(mapRequest, out err);
if (Xdoc != null)
{
if (absoluteAnchor)
{
Tile = new TileBound(MercatorHelper.ToMeters(top, left), MercatorHelper.ToMeters(bottom, right));
absoluteAnchor = false;
}
return(true);
}
return(false);
}
/// <summary>
/// NATURAL
/// Support for Natural like map elements
/// TODO:
/// - Trees: rows, woods.
/// - other naturals
/// </summary>
/// <returns></returns>
public IEnumerable <Natural> Natural()
{
var nodes = (from e in Xdoc.Descendants("node")
where e.Attribute("visible").Value == "true"
from t in e.Descendants("tag")
where t.Attribute("k").Value == "natural" && t.Attribute("v").Value == "tree"
select new
{
Id = e.Attribute("id").Value,
Name = t.Attribute("v").Value,
Lat = Convert.ToDouble(e.Attribute("lat").Value),
Long = Convert.ToDouble(e.Attribute("lon").Value),
Element = e
});
foreach (var node in nodes)
{
NaturalData data = default(NaturalData);
data.circumference = DefaultTreeCircumference;
data.height = DefaultTreeHeight;
foreach (var tag in node.Element.Descendants("tag"))
{
switch (tag.Attribute("k").Value.ToLower())
{
case "genus":
data.genus = tag.Attribute("v").Value;
break;
case "leaf_type":
data.leaf_type = tag.Attribute("v").Value;
break;
case "circumference":
MatchFloat(tag.Attribute("v").Value, out data.circumference);
break;
case "height":
MatchFloat(tag.Attribute("v").Value, out data.height);
break;
}
}
var pos = MercatorHelper.ToMeters(node.Lat, node.Long);
yield return(new Natural(node.Id, new Vector2(pos.X - Tile.Center.X, pos.Y - Tile.Center.Y), data));
}
}
/// <summary>
///
/// </summary>
/// <param name="way"></param>
/// <returns></returns>
private Polygon CreateFootprint(XElement way)
{
var footprint = new Polygon();
foreach (var elt in way.Descendants("nd"))
{
// find node that matches this ways' nodes ref
var node = FindNodeById(elt.Attribute("ref").Value);
if (node != null)
{
var pos = MercatorHelper.ToMeters(
Convert.ToDouble(node.Attribute("lat").Value),
Convert.ToDouble(node.Attribute("lon").Value));
footprint.Points.Add(new Vector2(pos.X - Tile.Center.X, pos.Y - Tile.Center.Y));
}
}
return(footprint);
}
