What is DIGIPIN?
Per https://www.indiapost.gov.in/VAS/Pages/digipin.aspx
The Department of Posts is advancing an initiative to establish a standardized, geo-coded addressing system in India, ensuring simplified addressing solutions for citizen-centric delivery of public and private services. The Department had collaborated with IIT Hyderabad for developing a National Level Addressing Grid-based addressing system, named as Digital Postal Index Number (DIGIPIN). This system will act as a strong and robust pillar of Geospatial Governance, leading to enhancements in public service delivery, faster emergency response and a significant boost to logistics efficiency.
The indiapost webpage says that digipin will eventually replace the extant six figure PIN code system of India Post(for example, the Pincode of GPO Delhi of 110001).
Some things of interest could be the following:
(a) The code doesn't contain numbers/alphanumeric that could be confused with binary or hexadecimal numbers. That is, 0, 1, A, B, C, D, E, F have been omitted in the addressing system.
(b) Resolution of 4m x 4m is the finest grain.
(c) Unlike previous Pincode system, even India's territorial waters have named addresses.
(d) Real time address is given by the system. This means we can find the path we are taking by reverse mapping the addresses accessed with a static digital map.
(e) If addresses are separated vertically, say, we are looking for a particular flat in a multi-storied condominium, we will have to add qualifiers to address that particular flat.