As part of a two weeks gap between [[Strategic Blue]] and [[Greenpixie]] I decided to create a web app based on the UK postcodes. I find them very interesting as they are an important part of everyday life. A postcode identifies a very specific place, with a limited amount of residences attached to it. Applications requiring a postal address only asks for the postcode and the house number and can then fill the rest of the data. Including street, house name (if needed) etc... And getting data related to postcodes is easy thanks to the incredible amount of data that the [Office of National Statistics](https://ons.gov.uk) shares publicly. All the census information, location hierarchy, prices of houses, hospitals and schools nearby and much much more. It is a perfect place to build some interesting data-apps using: - EasyDataTransform - Javascript - Observable framework - Observable Cloud (I might change from this one) - LeafletJS and OpenStreetMap for the maps # The data [ONS](https://www.ons.gov.uk/methodology/geography/geographicalproducts/postcodeproducts) provides two set of data: - National Statistics Postcode Lookup (NSPL). Useful to connect postcodes with data from the latest census - ONS Postcode Directory (ONSPD). Updated to be precise and be used for administrative activities. For my initial project I am using the NSPL as I want to connect the places with stats.