/// <inheritdoc />
public IObservable<GeocoderResult> Search(string name, BoundingBox area)
{
var sb = new StringBuilder(128);
sb.Append(_searchPath);
if (area != null)
{
sb.Append(Uri.EscapeDataString(String.Format(CultureInfo.InvariantCulture,
"viewbox={0:f4},{1:f4},{2:f4},{3:f4}&",
area.MinPoint.Longitude,
area.MinPoint.Latitude,
area.MaxPoint.Longitude,
area.MaxPoint.Latitude)));
}
sb.AppendFormat("q={0}&format=json", Uri.EscapeDataString(name));
return ObservableWWW.Get(sb.ToString())
.Take(1)
.SelectMany(r => (
from JSONNode json in JSON.Parse(r).AsArray
select ParseGeocoderResult(json)));
}
private GeocoderResult ParseGeocoderResult(JSONNode resultNode)
{
BoundingBox bbox = null;
string[] bboxArray = resultNode["boundingbox"].Value.Split(',');
if (bboxArray.Length == 4)
{
bbox = new BoundingBox(ParseGeoCoordinate(bboxArray[0], bboxArray[2]),
ParseGeoCoordinate(bboxArray[1], bboxArray[3]));
}
return new GeocoderResult()
{
PlaceId = long.Parse(resultNode["place_id"].Value),
OsmId = long.Parse(resultNode["osm_id"].Value),
OsmType = resultNode["osm_type"].Value,
DisplayName = resultNode["display_name"].Value,
Class = resultNode["class"].Value,
Type = resultNode["type"].Value,
Coordinate = ParseGeoCoordinate(resultNode["lat"].Value, resultNode["lon"].Value),
BoundginBox = bbox,
};
}
/// <summary> Downloads SRTM for given bounding box. </summary>
/// <param name="boundingBox"></param>
/// <returns>Streams</returns>
public IObservable<byte[]> Download(BoundingBox boundingBox)
{
return Observable.Throw<byte[]>(new NotImplementedException());
}
/// <summary> Checks whether bounding boxes are intersects </summary>
public bool Intersects(BoundingBox bbox)
{
var minX = Math.Max(MinPoint.Latitude, bbox.MinPoint.Latitude);
var minY = Math.Max(MinPoint.Longitude, bbox.MinPoint.Longitude);
var maxX = Math.Min(MaxPoint.Latitude, bbox.MaxPoint.Latitude);
var maxY = Math.Min(MaxPoint.Longitude, bbox.MaxPoint.Longitude);
return minX <= maxX && minY <= maxY;
}