public void DistanceBetweenTwoPointsCalculated(double[] from, double[] to, double expectedDistance)
{
var calc = new DistanceCalculator();
double dist = calc.DistanceBetweenTwoPoints(new LatitudeLongitude(from[0], from[1]), new LatitudeLongitude(to[0], to[1]));
Assert.AreEqual(expectedDistance, dist);
}
public static DataSet GenerateDistances(DataSet ds, LatitudeLongitude centreOfPostcode, DistanceCalculator distanceCalculator)
{
if (ds == null)
{
throw new ArgumentNullException("ds");
}
if (distanceCalculator == null)
{
throw new ArgumentNullException("distanceCalculator");
}
using (DataColumn dcK = new DataColumn("Kilometres", Type.GetType("System.Double")))
{
using (DataColumn dcM = new DataColumn("Miles", Type.GetType("System.Double")))
{
ds.Tables[0].Columns.Add(dcK);
ds.Tables[0].Columns.Add(dcM);
foreach (DataRow dr in ds.Tables[0].Rows)
{
var latLongInDataRow = new LatitudeLongitude(Convert.ToDouble(dr["Latitude"].ToString(), CultureInfo.InvariantCulture), Convert.ToDouble(dr["Longitude"].ToString(), CultureInfo.InvariantCulture));
var kilometres = distanceCalculator.DistanceBetweenTwoPoints(centreOfPostcode, latLongInDataRow) / 1000;
dr["Kilometres"] = kilometres;
dr["Miles"] = Math.Round((kilometres * 0.6214), 2);
}
ds.AcceptChanges();
return(ds);
}
}
}
public List <ZipCode> GetZipCodesBetweenTwoRadius(string zipCode, int startRadiusInMiles, int endInMiles)
{
ZipCode originZipCode = null;
try
{
originZipCode = GetZipCode(zipCode).FirstOrDefault();
}
catch (ObjectNotFoundInPersistenceException <ZipCode> )
{
return(null);
}
if (originZipCode == null)
{
return(null);
}
List <ZipCode> zipCodes = GetAllZipCodes(); // If optimization is needed, try grabbing all within square.
IDistanceCalculator distanceCalculator = new DistanceCalculator();
return(zipCodes.Where(z =>
{
var distance =
distanceCalculator.
DistanceBetweenTwoPoints(originZipCode.Latitude,
originZipCode.Longitude,
z.Latitude, z.Longitude);
return distance >= startRadiusInMiles && distance < endInMiles;
}).ToList());
}
private static double CalculateDistanceBetweenTwoZips(ZipCode originalZipCode, ZipCode destinationZipCode)
{
IDistanceCalculator distanceCalculator = new DistanceCalculator();
return
(Math.Round(
distanceCalculator.DistanceBetweenTwoPoints(originalZipCode.Latitude, originalZipCode.Longitude,
destinationZipCode.Latitude,
destinationZipCode.Longitude), 2));
}
public async Task <DataSet> GetNearestLibrariesRadialFromCms(Double dist, string nearPostcode, Cache cache)
{
DataSet dsCms = await GetSiteData(cache);
DataSet results;
var postcodeLookup = new LocateApiPostcodeLookup(new Uri(ConfigurationManager.AppSettings["LocateApiAuthorityUrl"]), ConfigurationManager.AppSettings["LocateApiToken"], new ConfigurationProxyProvider());
var centreOfPostcode = await postcodeLookup.CoordinatesAtCentreOfPostcodeAsync(nearPostcode);
if (centreOfPostcode == null)
{
return(null);
}
var distanceCalculator = new DistanceCalculator();
results = dsCms.Clone();
Double radius = dist;
// need to loop through each row pull out the easting and northing for the site and run it through a method which checks if the
// site is within the chosen radius
foreach (DataRow dr in dsCms.Tables[0].Rows)
{
// missing live data will likely be null or empty string from the cms placeholder?
if (!String.IsNullOrWhiteSpace(dr["Latitude"].ToString()) || !String.IsNullOrWhiteSpace(dr["Longitude"].ToString()))
{
var locationToCheck = new LatitudeLongitude(Convert.ToDouble(dr["Latitude"], CultureInfo.InvariantCulture), Convert.ToDouble(dr["Longitude"], CultureInfo.InvariantCulture));
var howFarAway = distanceCalculator.DistanceBetweenTwoPoints(centreOfPostcode, locationToCheck);
if (howFarAway <= radius)
{
results.Tables[0].ImportRow(dr);
}
}
}
return(GenerateDistances(results, centreOfPostcode, distanceCalculator));
}
