public static async Task <MapLocationFinderResult> FindLocationsAtAsync(CancellationToken ct, Geopoint queryPoint)
{
if (!Geocoder.IsPresent)
{
return(new MapLocationFinderResult(
locations: new List <MapLocation>().AsReadOnly(),
status: MapLocationFinderStatus.UnknownError
));
}
var addresses = await _geocoder.GetFromLocationAsync(
queryPoint.Position.Latitude,
queryPoint.Position.Longitude,
maxResults : MaxResults
);
var locations = addresses.Select(loc =>
{
var point = new Geopoint(new BasicGeoposition
{
Latitude = loc.Latitude,
Longitude = loc.Longitude
});
// Known differences:
// ==================
// - Android seems to provide 2 types of address:
// - Precise addresses with street, streetNumber and postCode (no district)
// - Less precise addresses with district (no street, streetNumber or postCode)
// - Precise addresses usually come first in the list
// - It might be possible to merge a precise address with a less precise one in order to get the district information (which Windows does provide)
// - Other known differences are listed below
var address = new MapAddress(
buildingFloor: string.Empty, // not supported
buildingName: string.Empty, // not supported
buildingRoom: string.Empty, // not supported
buildingWing: string.Empty, // not supported
formattedAddress: string.Join(", ", Enumerable.Range(0, loc.MaxAddressLineIndex).Select(loc.GetAddressLine)), // differs from Windows
continent: string.Empty, // not supported
country: loc.CountryName,
countryCode: loc.CountryCode, // differs from Windows (i.e., "CA" instead of "CAN")
district: loc.SubLocality, // seems to be null if a specific address is found (streetNumber, street and postCode)
neighborhood: loc.SubLocality, // haven't seen a non-null value yet (on both Windows and Android)
postCode: loc.PostalCode,
region: loc.AdminArea,
regionCode: string.Empty, // haven't seen a non-null value yet (on both Windows and Android)
street: loc.Thoroughfare,
streetNumber: loc.SubThoroughfare, // usually is a range (i.e., "706-212" instead of "706")
town: loc.Locality
);
return(new MapLocation(point, address));
})
.ToList()
.AsReadOnly();
var status = MapLocationFinderStatus.Success; // TODO
return(new MapLocationFinderResult(locations, status));
}
internal MapLocation(
Geopoint point,
MapAddress address,
string displayName = "",
string description = ""
)
{
Point = point;
Address = address;
DisplayName = displayName;
Description = description;
}
public static async Task <MapLocationFinderResult> FindLocationsAtAsync(CancellationToken ct, Geopoint queryPoint)
{
var locations = await _geocoder.ReverseGeocodeLocationAsync(new CLLocation(queryPoint.Position.Latitude, queryPoint.Position.Longitude));
var mapLocations = locations.Select(loc =>
{
var point = new Geopoint(
new BasicGeoposition
{
Latitude = loc.Location.Coordinate.Latitude,
Longitude = loc.Location.Coordinate.Longitude,
Altitude = loc.Location.Altitude
}
);
var address = new MapAddress(
buildingFloor: string.Empty, // not supported
buildingRoom: string.Empty, // not supported
buildingWing: string.Empty, // not supported
buildingName: string.Empty, // not supported
formattedAddress: string.Empty, // TODO
continent: null, // not supported
country: loc.Country,
countryCode: loc.IsoCountryCode,
district: loc.SubAdministrativeArea, // TODO: Verify
neighborhood: loc.SubLocality, // TODO: Verify
postCode: loc.PostalCode,
region: loc.AdministrativeArea, // TODO: Verify
regionCode: null, // TODO: Verify
street: loc.Thoroughfare, // TODO: Verify
streetNumber: loc.SubThoroughfare,
town: loc.Locality
);
return(new MapLocation(point, address));
})
.ToList()
.AsReadOnly();
var status = MapLocationFinderStatus.Success; // TODO
return(new MapLocationFinderResult(
locations: mapLocations,
status: status
));
}
