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1/23/2015  UT Dallas

POEC 6382 Applied GIS Software

13

Internal and External INFO Tables

INFO files can be internal or external.  The terms refer to where the data are physically stored on your computer system.

INTERNAL FILES:  

Data located in a data file internal to the INFO directory:

arcxxxx.dat contains the actual data

Examples of Internal files

lookup tables

data files from somewhere else, not topologically linked to a coverage, but they have been converted from original format into INFO file format

EXTERNAL FILES

Data located in a data file external to the INFO directory:

arcxxxx.dat contains a pointer to the actual data in the form of a pathname

Examples of External files

feature  attribute  tables (.pat, .aat, .nat)

coordinate tables (.tic, bnd)

Both types are accessed the same way from within INFO or TABLES

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