DigiPIN for Developers: Algorithm, Offline Encoding, APIs, and Integration
DigiPIN for Developers: Algorithm, Offline Encoding, APIs, and Integration DigiPIN is useful to developers because its core operation is deterministic. A coordinate can be converted into a 10-character code, and a valid code can be decoded into the centre of its grid cell without a central lookup database. Official Parameters Bounding box longitude: 63.5°E to 99.5°E. Bounding box latitude: 2.5°N to 38.5°N. Coordinate reference system: EPSG:4326/WGS84. Partitioning: 4×4 at every level. Levels: 10. Alphabet: 2, 3, 4, 5, 6, 7, 8, 9, C, J, K, L, M, P, F, T. Labelling Matrix F C 9 8 J 3 2 7 K 4 5 6 L M P T Rows are selected from north to south and columns from west to east. At each level, the current latitude-longitude rectangle is divided into sixteen smaller cells. The symbol in the selected row and column is appended to the code. Coordinate-to-Code Process Validate latitude and longitude against the official bounding box. Calculate the current latitude and longitude step sizes. Determine...