using System;
using System.Collections.Generic;
using System.Linq;
namespace CoordinateSharp
{
///
/// Used for UTM/MGRS Conversions
///
[Serializable]
internal class LatZones
{
public static List longZongLetters = new List(new string[]{"C", "D", "E", "F", "G", "H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T",
"U", "V", "W", "X"});
}
///
/// Used for handling diagraph determination
///
[Serializable]
internal class Digraphs
{
private List digraph1;
private List digraph2;
private String[] digraph1Array = { "A", "B", "C", "D", "E", "F", "G", "H",
"J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "U", "V", "W", "X",
"Y", "Z" };
private String[] digraph2Array = { "V", "A", "B", "C", "D", "E", "F", "G",
"H", "J", "K", "L", "M", "N", "P", "Q", "R", "S", "T", "U", "V" };
public Digraphs()
{
digraph1 = new List();
digraph2 = new List();
digraph1.Add(new Digraph() { Zone = 1, Letter = "A" });
digraph1.Add(new Digraph() { Zone = 2, Letter = "B" });
digraph1.Add(new Digraph() { Zone = 3, Letter = "C" });
digraph1.Add(new Digraph() { Zone = 4, Letter = "D" });
digraph1.Add(new Digraph() { Zone = 5, Letter = "E" });
digraph1.Add(new Digraph() { Zone = 6, Letter = "F" });
digraph1.Add(new Digraph() { Zone = 7, Letter = "G" });
digraph1.Add(new Digraph() { Zone = 8, Letter = "H" });
digraph1.Add(new Digraph() { Zone = 9, Letter = "J" });
digraph1.Add(new Digraph() { Zone = 10, Letter = "K" });
digraph1.Add(new Digraph() { Zone = 11, Letter = "L" });
digraph1.Add(new Digraph() { Zone = 12, Letter = "M" });
digraph1.Add(new Digraph() { Zone = 13, Letter = "N" });
digraph1.Add(new Digraph() { Zone = 14, Letter = "P" });
digraph1.Add(new Digraph() { Zone = 15, Letter = "Q" });
digraph1.Add(new Digraph() { Zone = 16, Letter = "R" });
digraph1.Add(new Digraph() { Zone = 17, Letter = "S" });
digraph1.Add(new Digraph() { Zone = 18, Letter = "T" });
digraph1.Add(new Digraph() { Zone = 19, Letter = "U" });
digraph1.Add(new Digraph() { Zone = 20, Letter = "V" });
digraph1.Add(new Digraph() { Zone = 21, Letter = "W" });
digraph1.Add(new Digraph() { Zone = 22, Letter = "X" });
digraph1.Add(new Digraph() { Zone = 23, Letter = "Y" });
digraph1.Add(new Digraph() { Zone = 24, Letter = "Z" });
digraph1.Add(new Digraph() { Zone = 1, Letter = "A" });
digraph2.Add(new Digraph() { Zone = 0, Letter = "V"});
digraph2.Add(new Digraph() { Zone = 1, Letter = "A" });
digraph2.Add(new Digraph() { Zone = 2, Letter = "B" });
digraph2.Add(new Digraph() { Zone = 3, Letter = "C" });
digraph2.Add(new Digraph() { Zone = 4, Letter = "D" });
digraph2.Add(new Digraph() { Zone = 5, Letter = "E" });
digraph2.Add(new Digraph() { Zone = 6, Letter = "F" });
digraph2.Add(new Digraph() { Zone = 7, Letter = "G" });
digraph2.Add(new Digraph() { Zone = 8, Letter = "H" });
digraph2.Add(new Digraph() { Zone = 9, Letter = "J" });
digraph2.Add(new Digraph() { Zone = 10, Letter = "K" });
digraph2.Add(new Digraph() { Zone = 11, Letter = "L" });
digraph2.Add(new Digraph() { Zone = 12, Letter = "M" });
digraph2.Add(new Digraph() { Zone = 13, Letter = "N" });
digraph2.Add(new Digraph() { Zone = 14, Letter = "P" });
digraph2.Add(new Digraph() { Zone = 15, Letter = "Q" });
digraph2.Add(new Digraph() { Zone = 16, Letter = "R" });
digraph2.Add(new Digraph() { Zone = 17, Letter = "S" });
digraph2.Add(new Digraph() { Zone = 18, Letter = "T" });
digraph2.Add(new Digraph() { Zone = 19, Letter = "U" });
digraph2.Add(new Digraph() { Zone = 20, Letter = "V" });
}
internal int getDigraph1Index(String letter)
{
for (int i = 0; i < digraph1Array.Length; i++)
{
if (digraph1Array[i].Equals(letter))
{
return i + 1;
}
}
return -1;
}
internal int getDigraph2Index(String letter)
{
for (int i = 0; i < digraph2Array.Length; i++)
{
if (digraph2Array[i].Equals(letter))
{
return i;
}
}
return -1;
}
internal String getDigraph1(int longZone, double easting)
{
int a1 = longZone;
double a2 = 8 * ((a1 - 1) % 3) + 1;
double a3 = easting;
double a4 = a2 + ((int)(a3 / 100000)) - 1;
return digraph1.Where(x=>x.Zone == Math.Floor(a4)).FirstOrDefault().Letter;
}
internal String getDigraph2(int longZone, double northing)
{
int a1 = longZone;
double a2 = 1 + 5 * ((a1 - 1) % 2);
double a3 = northing;
double a4 = (a2 + ((int)(a3 / 100000)));
a4 = (a2 + ((int)(a3 / 100000.0))) % 20;
a4 = Math.Floor(a4);
if (a4 < 0)
{
a4 = a4 + 19;
}
return digraph2.Where(x => x.Zone == Math.Floor(a4)).FirstOrDefault().Letter;
}
}
///
/// Diagraph model
///
[Serializable]
internal class Digraph
{
public int Zone { get; set; }
public string Letter { get; set; }
}
///
/// Used for setting whether a coordinate part is latitudinal or longitudinal.
///
[Serializable]
public enum CoordinateType
{
///
/// Latitude
///
Lat,
///
/// Longitude
///
Long
}
///
/// Used to set a coordinate part position.
///
[Serializable]
public enum CoordinatesPosition :int
{
///
/// North
///
N,
///
/// East
///
E,
///
/// South
///
S,
///
/// West
///
W
}
///
/// Coordinate type datum specification
///
[Serializable]
[Flags]
public enum Coordinate_Datum
{
///
/// Lat Long GeoDetic
///
LAT_LONG = 1,
///
/// UTM and MGRS
///
UTM_MGRS = 2,
///
/// ECEF
///
ECEF = 4,
}
///
/// Cartesian Coordinate Type
///
public enum CartesianType
{
///
/// Spherical Cartesian
///
Cartesian,
///
/// Earth Centered Earth Fixed
///
ECEF,
}
///
/// Used for easy read math functions
///
[Serializable]
internal static class ModM
{
public static double Mod(double x, double y)
{
return x - y * Math.Floor(x / y);
}
public static double ModLon(double x)
{
return Mod(x + Math.PI, 2 * Math.PI) - Math.PI;
}
public static double ModCrs(double x)
{
return Mod(x, 2 * Math.PI);
}
public static double ModLat(double x)
{
return Mod(x + Math.PI / 2, 2 * Math.PI) - Math.PI / 2;
}
}
///
/// Earth Shape for Calculations.
///
[Serializable]
public enum Shape
{
///
/// Calculate as sphere (less accurate, more efficient).
///
Sphere,
///
/// Calculate as ellipsoid (more accurate, less efficient).
///
Ellipsoid
}
}