Linda, 

Scale for the inset maps should only be given in a 500 note, as it does not pertain to the main map(s). The scale for the map proper (or "main map") belongs in 255$a. The quote you provided from OCLC pertains to a very specific situation -- a main map in which scale changes (or "varies") from the center of the map out to the outer portions of the map. Most of the maps that I know of that were created in this manner were done by companies in Germany so that tourists can see the details of the center of a city (the most historical part of the city with things such as museums or cathedrals that would attract the attention of tourists looking to visit such things). Scale thus is often shown on the map in this manner: 

Scale 1:10,000 - 1:25,000 

I'm hoping that one or more readers here can supply you with example records for you to see. If I find some time later today I probably can dig up one or two to send your way. 

Paige 

From: "Zellmer, Linda" <[log in to unmask]> 
To: "[log in to unmask]" <[log in to unmask]> 
Sent: Monday, April 3, 2017 11:58:16 AM 
Subject: 255 with two different scales? 

Hello, 

I am cataloging a set of maps that provides a scale for the map proper and a scale for the inset maps. The OCLC 255 page says "If this scale within a single item varies and the largest and smallest values are known, record the range." but does not give any examples of such a 255 field. If someone has entered two different scales in an OCLC record or knows of an example of such a record, could you please send me a copy of the OCLC record number so that I can look at it and see what it looks like? Thank you. Linda Zellmer 

-- 
Linda Zellmer 
Government Information & Data Services Librarian 
Liaison to Natural Sciences & Agriculture 
415 Malpass Library 
Macomb, IL 61455 
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Phone: 309-298-2723 
Fax: 309-298-2791