Zone Definition file
File type: Various data file
A Zone Definition file uses the .zdf file extension and stores boundary grid information for each zone.
The file is associated with the McDonnell Douglas ZONI3G surface grid generator and provides a compact way to transfer zone data between computers.
Found 2 different file type records with the same zdf filename suffix.
File type category:
Various data file
Date updated: October 29, 2026
A Zone Definition File (ZDF) is a formatted ASCII file produced by the McDonnell Douglas surface grid generator ZONI3G. It contains the boundary grid information needed to describe each zone.
By storing zone definitions separately and compactly, the file can reduce the amount of data transferred between machines and allow quicker access to the zone information.
The zone data can describe multizone structured grids together with associated boundary-condition data. The format also supports overlapping grids and unstructured grids.
Open a .zdf file with ZONI3G, the McDonnell Douglas surface grid generator for which the format was created. Because the file is formatted ASCII, its contents can also be viewed as text, but a text editor will not interpret the grid definitions or boundary data.
File type category:
Various data file
Date updated: January 22, 2018
Record marked as obsolete and not updated for a long time.
The zdf file extension is associated with some applications developed by the Z-Firm company.
The zdf file stores document folder.
Seems to be obsolete file format without support from developer or producer.
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