public void GetDistanceTest()
{
var distance = GeoDistanceTo.GetDistance(51.6824134, 5.2984455, 51.6852471, 5.2943688);
// 0.4222 km
// https://www.movable-type.co.uk/scripts/latlong.html
// https://stackoverflow.com/questions/27928/calculate-distance-between-two-latitude-longitude-points-haversine-formula
Assert.AreEqual(0.4223, distance, 0.001);
}
/// <summary>
/// Reverse Geo Syncing for a folder
/// </summary>
/// <param name="metaFilesInDirectory">list of files to lookup</param>
/// <param name="overwriteLocationNames">true = overwrite the location names, that have a gps location</param>
/// <returns></returns>
public List <FileIndexItem> LoopFolderLookup(List <FileIndexItem> metaFilesInDirectory,
bool overwriteLocationNames)
{
InitReverseGeoCode();
metaFilesInDirectory = RemoveNoUpdateItems(metaFilesInDirectory, overwriteLocationNames);
var subPath = metaFilesInDirectory.FirstOrDefault()?.ParentDirectory;
new GeoCacheStatusService(_cache).StatusUpdate(subPath, metaFilesInDirectory.Count, StatusType.Total);
foreach (var metaFileItem in metaFilesInDirectory.Select(
(value, index) => new { value, index }))
{
// Create a point from a lat/long pair from which we want to conduct our search(es) (center)
var place = _reverseGeoCode.CreateFromLatLong(
metaFileItem.value.Latitude, metaFileItem.value.Longitude);
// Find nearest
var nearestPlace = _reverseGeoCode.NearestNeighbourSearch(place, 1).FirstOrDefault();
// Distance to avoid non logic locations
var distanceTo = GeoDistanceTo.GetDistance(
nearestPlace.Latitude,
nearestPlace.Longitude,
metaFileItem.value.Latitude,
metaFileItem.value.Longitude);
new GeoCacheStatusService(_cache).StatusUpdate(metaFileItem.value.ParentDirectory,
metaFileItem.index, StatusType.Current);
if (distanceTo > 35)
{
continue;
}
// if less than 35 kilometers from that place add it to the object
metaFileItem.value.LocationCity = nearestPlace.NameASCII;
// Catch is used for example the region VA (Vatican City)
try
{
metaFileItem.value.LocationCountry = new RegionInfo(nearestPlace.CountryCode).NativeName;
}
catch (ArgumentException e)
{
Console.WriteLine(e);
}
metaFileItem.value.LocationState = GetAdmin1Name(nearestPlace.CountryCode, nearestPlace.Admincodes);
}
// Ready signal
new GeoCacheStatusService(_cache).StatusUpdate(subPath,
metaFilesInDirectory.Count, StatusType.Current);
return(metaFilesInDirectory);
}
public void GetDistanceTestLargeNumber()
{
var distance = GeoDistanceTo.GetDistance(-51.6824134, -5.2984455, 51.6852471, 5.2943688);
Assert.AreEqual(11549.857139273592, distance, 0.001);
}