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Utilities
Maidenhead Grid Locator (Ham Radio)
Convert geographic coordinates to Maidenhead Grid Square (e.g. GG87gx) used by ham radio operators, precision 4/6/8 chars.
Grid (4 caracteres — campo + quadrado)
Grid (6 caracteres — + subquadrado)
Grid (8 caracteres — precisão refinada)
Algoritmo Maidenhead Locator: campo (A-R) → quadrado (0-9) → subquadrado (a-x) → refinamento (0-9).
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