Natural Location Identifier (NLI) API

Reference implementation of Natural Location Identifiers, ISO 8000-118.

The NLI API provides utilities for creating, encoding, decoding, and managing Natural Location Identifiers (NLI). These identifiers can represent geographical locations and storey-specific data in a standardized format.

---

Functions

create(lat: number, long: number, elevation: Elevation): NLI

Creates an NLI from latitude, longitude, and elevation.

Parameters:

• lat (number): Latitude of the location.
• long (number): Longitude of the location.
• elevation (Elevation): Elevation of the location.

Returns:

• NLI: A Natural Location Identifier.

---

encode(nli: NLI): string

Encodes an NLI into a standalone ISO-compliant string with a prefix.

Parameters:

• nli (NLI): The Natural Location Identifier to encode.

Returns:

• string: The encoded ISO-compliant string.

---

decode(s: string): NLI

Decodes a string into an NLI.

Parameters:

• s (string): The encoded string to decode.

Returns:

• NLI: The decoded Natural Location Identifier.

---

encodeTUID(nli: StoreyNLI): string

Encodes a StoreyNLI for use within a TUID.

Parameters:

• nli (StoreyNLI): The Storey-specific Natural Location Identifier.

Returns:

• string: The encoded string for use in a TUID.

---

decodeTUID(s: string): StoreyNLI

Decodes a string into a StoreyNLI.

Parameters:

• s (string): The encoded TUID string.

Returns:

• StoreyNLI: The decoded Storey-specific Natural Location Identifier.

---

Types

NLI

Represents a Natural Location Identifier. For details on its structure, refer to the types.d.ts file.

---

StoreyNLI

Represents a Storey-specific Natural Location Identifier. Refer to the types.d.ts file for more details.

---

Elevation

Represents the elevation of a location. Refer to the types.d.ts file for the expected structure.

---

Usage

import { create, encode, decode, encodeTUID, decodeTUID } from "nli"

// Example: Create and encode an NLI
const nli = create(37.7749, -122.4194, { storey: 3 })
const encoded = encode(nli)
console.log(encoded)

// Example: Decode a standalone NLI
const decoded = decode(encoded)
console.log(decoded)

// Example: Encode and decode a StoreyNLI for TUID
const storeyNli = { ...decoded, storey: 5 }
const tuidEncoded = encodeTUID(storeyNli)
console.log(tuidEncoded)

const tuidDecoded = decodeTUID(tuidEncoded)
console.log(tuidDecoded)