public void CanCalculateDegreesCorrespondingToToleranceInFeet()
{
var geometry = DbSpatialHelper.MakeDbGeometryFromCoordinates(120, 45, LtInfoGeometryConfiguration.DefaultCoordinateSystemId);
var feetPerAverageLatLonDegree = ((MetersPerLatDegreeAt45DegreesNorth + MetersPerLonDegreeAt45DegreesNorth) / 2) * FeetPerMeter;
var a = DbSpatialHelper.FeetToAverageLatLonDegree(geometry, feetPerAverageLatLonDegree);
//Check that our calcs match the NWS expected value of 1 degree
Assert.That(a, Is.InRange(0.9999, 1.0001));
//Check at 20 degrees North
geometry = DbSpatialHelper.MakeDbGeometryFromCoordinates(120, 20, LtInfoGeometryConfiguration.DefaultCoordinateSystemId);
var MetersPerLatDegreeAt20DegreesNorth = 110704.27818646189;
var MetersPerLonDegreeAt20DegreesNorth = 104647.05311831612;
feetPerAverageLatLonDegree = ((MetersPerLatDegreeAt20DegreesNorth + MetersPerLonDegreeAt20DegreesNorth) / 2) * FeetPerMeter;
a = DbSpatialHelper.FeetToAverageLatLonDegree(geometry, feetPerAverageLatLonDegree);
//Check that our calcs match the NWS expected value of 1 degree
Assert.That(a, Is.InRange(0.9999, 1.0001));
//Check at 60 degrees North
geometry = DbSpatialHelper.MakeDbGeometryFromCoordinates(120, 60, LtInfoGeometryConfiguration.DefaultCoordinateSystemId);
var MetersPerLatDegreeAt60DegreesNorth = 111412.24020000001;
var MetersPerLonDegreeAt60DegreesNorth = 55799.979000000014;
feetPerAverageLatLonDegree = ((MetersPerLatDegreeAt60DegreesNorth + MetersPerLonDegreeAt60DegreesNorth) / 2) * FeetPerMeter;
a = DbSpatialHelper.FeetToAverageLatLonDegree(geometry, feetPerAverageLatLonDegree);
//Check that our calcs match the NWS expected value of 1 degree
Assert.That(a, Is.InRange(0.9999, 1.0001));
}
public void CanCalculateFeetPerDegreeLongitude()
{
var geometry = DbSpatialHelper.MakeDbGeometryFromCoordinates(120, 45, LtInfoGeometryConfiguration.DefaultCoordinateSystemId);
var feetPerLonDegree = MetersPerLonDegreeAt45DegreesNorth * FeetPerMeter;
var a = DbSpatialHelper.FeetToLonDegree(geometry, feetPerLonDegree);
//Check that our calcs match the NWS expected value of 1 degree
Assert.That(a, Is.InRange(0.9999, 1.0001));
}
public void CanCalculateFeetPerDegreeLatitude()
{
var geometry = DbSpatialHelper.MakeDbGeometryFromCoordinates(120, 45, 4326);
var feetPerLatDegree = MetersPerLatDegreeAt45DegreesNorth * FeetPerMeter;
var a = DbSpatialHelper.FeetToLatDegree(geometry, feetPerLatDegree);
//Check that our calcs match the NWS expected value of 1 degree
Assert.That(a, Is.InRange(0.9999, 1.0001));
}