getMinNorthing static method Null safety

int getMinNorthing(String zoneLetter)

The function getMinNorthing returns the minimum northing value of a MGRS zone.

Ported from Geotrans' c Lattitude_Band_Value structure table.

@private @param {string} zoneLetter The MGRS zone to get the min northing for. @return {number}

Implementation

static int getMinNorthing(String zoneLetter) {
  int northing;
  switch (zoneLetter) {
    case 'C':
      northing = 1100000;
      break;
    case 'D':
      northing = 2000000;
      break;
    case 'E':
      northing = 2800000;
      break;
    case 'F':
      northing = 3700000;
      break;
    case 'G':
      northing = 4600000;
      break;
    case 'H':
      northing = 5500000;
      break;
    case 'J':
      northing = 6400000;
      break;
    case 'K':
      northing = 7300000;
      break;
    case 'L':
      northing = 8200000;
      break;
    case 'M':
      northing = 9100000;
      break;
    case 'N':
      northing = 0;
      break;
    case 'P':
      northing = 800000;
      break;
    case 'Q':
      northing = 1700000;
      break;
    case 'R':
      northing = 2600000;
      break;
    case 'S':
      northing = 3500000;
      break;
    case 'T':
      northing = 4400000;
      break;
    case 'U':
      northing = 5300000;
      break;
    case 'V':
      northing = 6200000;
      break;
    case 'W':
      northing = 7000000;
      break;
    case 'X':
      northing = 7900000;
      break;
    default:
      northing = -1;
  }
  if (northing >= 0) {
    return northing;
  } else {
    throw Exception('Invalid zone letter: $zoneLetter');
  }
}