2421 ESRI ArcInfo DAT File (External) Text (Structured) Files which comprise part of an ArcInfo Coverage, which is a data model whose purpose is to store georelational data such as spatial location and descriptive data. Each ArcInfo Coverage resides in an ArcInfo workspace, a directory which contains two or more folders. These packages are generated using ArcGIS software, produced by Esri (https://www.esri.com/en-us/arcgis/about-arcgis/overview.) An ArcInfo coverage dataset typically has two types of .dat file: internal, which store the actual data table, and external, which contains a relative path to the data table. External .dat files follow a unique naming pattern: arcXXXX.dat, where XXXX is incrementally increasing number starting from 0000, e.g. arc0000.dat, arc0001.dat. The .dat files always come in pair with a NIT file and are both stored in an INFO directory at the root. 234 National Library of Australia / National Library of Australia 06 Jan 2022 06 Jan 2022 fmt/1594 PUID dat File extension 1933 ESRI ArcInfo .dat File (external) BOF, offset 0, magic bytes: ../ EOF, offset 0-100, magic bytes,: .adf 1 Absolute from BOF 0 0 2E2E2F 1 Absolute from EOF 0 60 2E616466 Equivalent to 2427 ESRI ArcInfo DAT File (Internal) Has priority over 2422 Canon Raw