/// <summary>
/// Reset the location from a string. See <see cref="GeoCoords(string, bool, bool)"/>.
/// </summary>
/// <param name="s">1-element, 2-element, or 3-element string representation of the position.</param>
/// <param name="centerp">governs the interpretation of <see cref="MGRS"/> coordinates.</param>
/// <param name="longfirst">governs the interpretation of geographic coordinates.</param>
public void Reset(string s, bool centerp = true, bool longfirst = false)
{
var sa = s.Split(" \t\n\v\f\r,".ToCharArray(), StringSplitOptions.RemoveEmptyEntries);
if (sa.Length == 1)
{
int prec;
(_zone, _northp, _easting, _northing, prec) = MGRS.Reverse(sa[0].AsSpan(), centerp);
(_lat, _long) = UTMUPS.Reverse(_zone, _northp, _easting, _northing, out _gamma, out _k);
}
else if (sa.Length == 2)
{
(_lat, _long) = DMS.Decode(sa[0], sa[1], longfirst);
_long = AngNormalize(_long);
(_zone, _northp, _easting, _northing) = UTMUPS.Forward(_lat, _long, out _gamma, out _k);
}
else if (sa.Length == 3)
{
int zoneind, coordind;
if (sa[0].Length > 0 && char.IsLetter(sa[0][sa[0].Length - 1]))
{
zoneind = 0;
coordind = 1;
}
else if (sa[2].Length > 0 && char.IsLetter(sa[2][sa[2].Length - 1]))
{
zoneind = 2;
coordind = 0;
}
else
{
throw new GeographicException("Neither " + sa[0] + " nor " + sa[2]
+ " of the form UTM/UPS Zone + Hemisphere"
+ " (ex: 38n, 09s, n)");
}
(_zone, _northp) = UTMUPS.DecodeZone(sa[zoneind].AsSpan());
for (int i = 0; i < 2; ++i)
{
if (i != 0)
{
_northing = sa[coordind + i].ParseDouble();
}
else
{
_easting = sa[coordind + i].ParseDouble();
}
}
(_lat, _long) = UTMUPS.Reverse(_zone, _northp, _easting, _northing, out _gamma, out _k);
FixHemisphere();
}
else
{
throw new GeographicException("Coordinate requires 1, 2, or 3 elements");
}
CopyToAlt();
}
