1066 ESRI Shapefile Header Index GIS This is an outline record only, and requires further details, research or authentication to provide information that will enable users to further understand the format and to assess digital preservation risks associated with it if appropriate. If you are able to help by supplying any additional information concerning this entry, please return to the main PRONOM page and select ‘Add an Entry’. Text 1 Digital Preservation Department / The National Archives 21 Jan 2011 21 Jan 2011 fmt/321 PUID aih File extension 415 ESRI Shapefile Header Index Signature based on structured pattern observed in sample files, with first 5 bytes being constant,the next 35 used to identify index header column names. File always ends with 01 1 Absolute from BOF 0 0000000001{35}2E{34}01