/// <inheritdoc />
public MapBoundingBox CalculateBoundingBox(List<MapPoint> pushpins)
{
if (pushpins == null || !pushpins.Any())
{
throw new ArgumentNullException("pushpins");
}
// find the bounding box.
// South Latitude, lowerst latitude
// West Longitude, lowerst longitude
// North Latitude, largest latitide
// East Longitude. largest longitude
var firstPin = pushpins[0];
var minLat = firstPin.Latitude;
var minLon = firstPin.Longitude;
var maxLat = firstPin.Latitude;
var maxLon = firstPin.Longitude;
foreach (var pushPin in pushpins)
{
minLat = minLat > pushPin.Latitude ? pushPin.Latitude : minLat;
minLon = minLon > pushPin.Longitude ? pushPin.Longitude : minLon;
maxLat = maxLat < pushPin.Latitude ? pushPin.Latitude : maxLat;
maxLon = maxLon < pushPin.Longitude ? pushPin.Longitude : maxLon;
}
var southWest = new MapPoint(minLat, minLon);
var northEast = new MapPoint(maxLat, maxLon);
var boundingBox = new MapBoundingBox(northEast, southWest);
return boundingBox;
}
public async Task<Image> GetStaticMapImage(MapBoundingBox mapAreaBoundingBox, MapRequest mapRequest)
{
var mapDescription = mapRequest.MapDescription;
var mapPathParams = new SortedList<int, string> { { 1, mapDescription.ImagerySet.ToString() } };
var mapImageQueryArgs = new List<KeyValuePair<string, string>>();
AddMapSizeQueryArguments(mapDescription, mapImageQueryArgs);
AddMapAreaQueryArguments(mapAreaBoundingBox, mapImageQueryArgs);
AddDisplayPushpins(mapRequest, mapImageQueryArgs);
AddMapKeyQueryArguments(this.BingAPIKey, mapImageQueryArgs);
var mapImage = await this.restClient.DownloadImage(BingRestImageryRoadmapsEndpoint, mapPathParams, mapImageQueryArgs);
return mapImage.ReSize(mapDescription.MapImageScaleFactor);
}
private static void AddMapAreaQueryArguments(
MapBoundingBox boundingBox,
List<KeyValuePair<string, string>> queryArguments)
{
// Bing needs: South Latitude, West Longitude, North Latitude, East Longitude
// ?mapArea=37.317227,-122.318439,37.939081,-122.194565&
var mapArea = string.Format(
"{0},{1},{2},{3}",
boundingBox.SouthWest.Latitude,
boundingBox.SouthWest.Longitude,
boundingBox.NorthEast.Latitude,
boundingBox.NorthEast.Longitude);
queryArguments.Add(new KeyValuePair<string, string>("ma", mapArea));
}
public async Task<IMapMetadata> GetStaticMapMetaData(
MapBoundingBox mapAreaBoundingBox,
MapRequest mapRequest)
{
var mapDescription = mapRequest.MapDescription;
IEnumerable<MapPoint> mapPushPinCoordinates = mapRequest.Pushpins.Where(pp=>pp.CustomPushpinIcon != null).Select(p=>p.Coordinate);
if (mapAreaBoundingBox == null)
{
throw new ArgumentNullException("mapAreaBoundingBox");
}
var pushPinCoordinates = mapPushPinCoordinates as IList<MapPoint> ?? mapPushPinCoordinates.ToList();
if (mapPushPinCoordinates == null || !pushPinCoordinates.Any())
{
throw new ArgumentNullException("mapPushPinCoordinates");
}
var mapPathParams = new SortedList<int, string> { { 1, mapDescription.ImagerySet.ToString() } };
var metaDataQueryArgs = new List<KeyValuePair<string, string>>
{
new KeyValuePair<string, string>(
"o",
"json"),
new KeyValuePair<string, string>(
"mapmetadata",
"1"),
};
AddMapSizeQueryArguments(mapDescription, metaDataQueryArgs);
AddMapAreaQueryArguments(mapAreaBoundingBox, metaDataQueryArgs);
AddMapKeyQueryArguments(this.BingAPIKey, metaDataQueryArgs);
var bingMetaData = await this.GetBingMapMetadata(pushPinCoordinates, mapPathParams, metaDataQueryArgs);
if (bingMetaData == null)
{
return null;
}
// NOTE: do this in try catch incase ResourceSets or MetadataResources returned from BING are null.
try
{
return bingMetaData.ResourceSets.FirstOrDefault().MetadataResources.FirstOrDefault();
}
catch (Exception ex)
{
throw new InvalidDataException("invalid MetaData from Bing REST api", ex);
}
}
