https://github.com/pranamphd/digipin-swift

Swift implementation of the DIGIPIN geo-coded addressing system.
https://github.com/pranamphd/digipin-swift

address address-validation digipin geo-coding india pincode swift swift-library swift-package-manager swift-packages zipcode

Last synced: 29 days ago
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Swift implementation of the DIGIPIN geo-coded addressing system.

• Host: GitHub
• URL: https://github.com/pranamphd/digipin-swift
• Owner: pranamphd
• License: apache-2.0
• Created: 2026-01-16T06:39:47.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2026-01-29T09:24:00.000Z (30 days ago)
• Last Synced: 2026-01-29T20:59:24.838Z (29 days ago)
• Topics: address, address-validation, digipin, geo-coding, india, pincode, swift, swift-library, swift-package-manager, swift-packages, zipcode
• Language: Swift
• Homepage:
• Size: 27.3 KB
• Stars: 1
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Contributing: CONTRIBUTING.md
  • License: LICENSE
  • Code of conduct: CODE_OF_CONDUCT.md
  • Codeowners: .github/CODEOWNERS
  • Security: SECURITY.md

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README

          
# digipin-swift

DIGIPIN (Digital Postal Index Number) is a national-level, geo-coded addressing grid developed by the **Department of Posts, Ministry of Communications, Government of India**. It provides a deterministic and reversible method to represent geographic locations in India using a **10-character alphanumeric code derived from latitude and longitude**.

This repository contains a **Swift implementation of the DIGIPIN algorithm**, intended to enable consistent and correct adoption across platforms, applications, and systems.

![DIGIPIN Logo](/digipin-social-preview.png)

## What this repository provides

- Deterministic conversion from **latitude / longitude → DIGIPIN**

- Reversible conversion from **DIGIPIN → geographic coordinates**

- Comprehensive tests to ensure correctness

- Implementation aligned with the **final DIGIPIN Technical Specification (March 2025)**

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## Specification reference

This project implements the **DIGIPIN (Digital Postal Index Number)** algorithm strictly according to the official technical specification published by the **Department of Posts, Ministry of Communications, Government of India**.

The authoritative specification is available at:

[https://www.indiapost.gov.in/digipin](https://www.indiapost.gov.in/digipin)

All implementations in this repository aim to faithfully reproduce the behavior described in the final DIGIPIN Technical Document (March 2025).

> This repository provides an independent implementation of the DIGIPIN specification and is not an official distribution of the Department of Posts unless explicitly stated otherwise.

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## Design principles

- **Specification-first**: Implementation strictly follows the DIGIPIN technical specification.

- **Deterministic**: The same input always produces the same output, regardless of language or platform.

- **No external dependencies**: Core logic is self-contained.

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## Status

This repository is under active development.

The library interfaces (function and type signatures) may evolve until the first stable release (`v1.0.0`).

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## License

This project is licensed under the **Apache License, Version 2.0**.

See the [LICENSE](LICENSE) file for details.