ESRI ArcInfo Grid .nit File

Summary

Name

ESRI ArcInfo Grid .nit File

Identifiers

PUID: fmt/1596

Format type

GIS

Description

Files which comprise part of an ArcInfo Grid, a raster data model storing information in a matrix of cells, with values representing a coordinate, and sometimes linked to an attribute table. ArcInfo Grid models are generated using ArcGIS software, produced by Esri (https://www.esri.com/en-us/arcgis/about-arcgis/overview.) Nit files follow a consistent naming pattern: arcXXXX.nit, where XXXX is an incrementally increasing number starting from 0000, e.g, arc000.nit, arc0001.nit, arc0002.nit. Nit files are always stored in an /info/ directory at the root. They are associated with .dat and .adf files, and their function is to store file structure and field definition information of the grid.

Note

http://avce00.maptools.org/docs/v7_bin_cover.html#ARC.DAT http://webhelp.esri.com/arcgisdesktop/9.2/index.cfm?TopicName=How_coverages_are_stored https://support.esri.com/en/technical-article/000008526 https://www.loc.gov/preservation/digital/formats/fdd/fdd000281.shtml

File extensions

nit

Source

National Library of Australia / National Library of Australia

Internal signatures

Changelog

• Updated in V115

  Release date

  15 November 2023

  ESRI ArcInfo Grid .nit File: Max-offset modified for the BOF/EOF signature to allow for more exact signature identification. Format type modified to GIS. Submitted by Digital Preservation Department, The National Archives (UK).

• Updated in V103

  Release date

  11 March 2022

  ESRI ArcInfo Grid .nit File: Capitalised 'File' in file format name and signature. Amended BOF signature to allow for 02, 04 or 08 at byte 2. Removed EOF signature. Submitted by Digital Preservation Department, The National Archives (UK).

• Added in V101

  Release date

  15 February 2022

  ESRI ArcInfo Grid .nit File: Signature researched and samples provided by The National Library of Australia.

  ESRI ArcInfo Grid .nit File: Full entry added. Submitted by The National Library of Australia.