export declare const BASE32 = "0123456789bcdefghjkmnpqrstuvwxyz";
export declare const BASE32_DECODE: Record<string, number>;
/** Throw TypeError if any character is not a valid base32 geohash character. */
export declare function validateGeohash(hash: string): void;
/** Return true if the string is a non-empty valid base32 geohash. */
export declare function isValidGeohash(hash: string): boolean;
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