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OzEnter DATA ENTRY
==================
Introduction
------------
Most data are entered into OzGIS as external data files. Examples are Census
data and Census digitised boundaries. These files come from Census Bureaux,
Mapping agencies, data supply companies or your own data-base systems.
Some data can be prepared or modified with word processors or spreadsheets.
The files are entered into the system via the OzEnter program which checks the
data and writes them to internal files.
All data files must have names that finish with the extension DAT.
e.g. LONDON.DAT, A:SALES.DAT
Often data files will need further processing by the OzData program before used
for mapping e.g. attribute data may need manipulating by arithmetic expressions
geographic line segments may need thinning and forming into polygons.
The system comes with many of the system files already entered e.g. device
files. The data files are also provided.
Example
-------
You will often have a file of attribute data (such as population Census
data) and a file of digitised boundary data for mapping:
We will look at data for Far East Asia. There are two data files:
FEA-G.DAT are the digitised boundary data, and
FEA-A.DAT are the attribute data
To to enter the data so it is checked and written into internal files:
type
cd \ozdemo
ozenter
1. select the option to enter standard format geographic files
give the input data file as fea-g
give the output geographic file as fea (or the default if you like)
2. select the option to enter an attribute file
give the input data file as fea-a
give the output attribute file as fea (or the default if you like)
3. type F10 to exit