Terrorist Incident Reporting System (TIRSA) Data File, June 1972

A NARA file unit consiting of a NIPS Data File.

PyNIPS validation

PyNIPS is capable of reading the NIPS file. See the layout as output by the nipsext info command: TIRSA.7206 (NIPSEXT info).

Periodic Sets

There are 7 Periodic Sets defined in the data file. However, There are no records for Periodic Sets 1, 5, 6 and 7.

Geographic Coordinates

Unfortunately there seem to be no elements with data mode GeographicCoordinate.

Geographical coordinates seem to be encoded as UTM (element UTM in Periodic Set 2).

File Organization

The techdoc has a note:

FILE ORGANIZATION: Indexed sequentially

This seems to mean Indexed Sequential Access Method (ISAM) (see also Data set (IBM)). What this exactly means is unclear, but we have a reference here.