Created
June 9, 2019 07:47
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Converts decimal longitude and latitude to Maidenhead Grid Square
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| void calcLocator(char *dst, double lat, double lon) { | |
| int o1, o2, o3; | |
| int a1, a2, a3; | |
| double remainder; | |
| // longitude | |
| remainder = lon + 180.0; | |
| o1 = (int)(remainder / 20.0); | |
| remainder = remainder - (double)o1 * 20.0; | |
| o2 = (int)(remainder / 2.0); | |
| remainder = remainder - 2.0 * (double)o2; | |
| o3 = (int)(12.0 * remainder); | |
| // latitude | |
| remainder = lat + 90.0; | |
| a1 = (int)(remainder / 10.0); | |
| remainder = remainder - (double)a1 * 10.0; | |
| a2 = (int)(remainder); | |
| remainder = remainder - (double)a2; | |
| a3 = (int)(24.0 * remainder); | |
| dst[0] = (char)o1 + 'A'; | |
| dst[1] = (char)a1 + 'A'; | |
| dst[2] = (char)o2 + '0'; | |
| dst[3] = (char)a2 + '0'; | |
| dst[4] = (char)o3 + 'A'; | |
| dst[5] = (char)a3 + 'A'; | |
| dst[6] = (char)0; | |
| } |
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