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Creating a Feature Gazetteer

In the context of this topic, the term 'Gazetteer' is used to mean the index pages you would find at the back of a street atlas.

The grid created on the Plot Index overlay can be exploded as described in the Creating an Index Page topic. You can then add an Expression to the Schema of any of your data overlays which will automatically detect the page number or user cell reference which contains each map feature. You will then be able to display the Table Window of your data and export a Feature Gazetteer to a comma separated file. This file can then be read into an application such as Microsoft Excel and formatted to suit your book of plots.

The following example shows how to create a Gazetteer of addresses supplied as Geodirectory Address Point data.

Display the base map data (e.g. OSI Largescale and Discovery data).
Add the Address Point dataset as a new overlay.
Create a user-defined grid if necessary, or zoom to all items on the Address Point overlay.
Create a book of plots as described in previous chapters.
Click the right mouse button on the Plot Index grid, and select Explode. This will explode the Group item into its constituent cells.
Display the Overlays dialog Overlays [Home-Map] or F2 and select the Schema tab.
Select the Address Point overlay from the overlay drop-down list.
Click the Add button in the Column drop-down box.
Enter this expression in the dialog:

FindContainer("Plot Index").SheetNo$

This will cause Book Plotter to detect the containing grid cell on the Plot Index overlay of every point in the AddressPoint overlay.

To utilise a user-defined cell reference, use the expression:

FindContainer("Plot Index").BookCellRef$.
Add or remove other columns in the schema as required and close the Overlays dialog.
Select Table [View-Document Views] and select the Address Point overlay.
Use Export to File [File-Export] to export this Table View as a comma separated file.

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