One other thing to be aware of Ahava. Some "maps" are of a specific type and because of that you need to add an additional subject heading to share what it actually is. In particular I am thinking of maps that show the ocean floor with its valleys and mountains and such and depths of water involved. Most often the word "bathymetry" or "bathymetric" will appear in the title to guide you. In such cases provide a 651 for the place but also add:

650  0 Bathymetric maps.

and if your library uses 655 genre/form fields this can also be added:

655  7 Bathymetric maps. $2 lcgft [for example]

I do not understand why a library would not want to add subject headings for maps since so many are based on one or more topics and thus deserve to have one or more 650s included. Definitely follow the advice given by Caroline and Heather though, including at least a 651 for the place shown is important for collocation.

Paige
________________________________
From: Maps-L: Map Librarians, etc. <[log in to unmask]> on behalf of Keizer, Caroline <[log in to unmask]>
Sent: Monday, January 16, 2023 7:39 AM
To: [log in to unmask] <[log in to unmask]>
Subject: Re: Question about LCSH subdivisions


Ahava, your first example can be correct if the map is historical in nature, but I would not just use it if a map is say from the 1960s and you want to cover that time period.  But we have many examples when a map depicts historical events and then: $$a [name of place] $$x History $$y [chronological subdivision] $$v Maps is correct.

However, I would always recommend have $$a [name of place] $$v Maps as that would co-locate all maps of one place together.





From: Maps-L: Map Librarians, etc. <[log in to unmask]> On Behalf Of Ahava Cohen
Sent: Sunday, January 15, 2023 7:36 AM
To: [log in to unmask]
Subject: Question about LCSH subdivisions



You don't often get email from [log in to unmask]<mailto:[log in to unmask]>. Learn why this is important<https://aka.ms/LearnAboutSenderIdentification>

Our classification department doesn't usually add subject headings to maps, so the department head asked me to check with the experts (you all). Her question:



Is this kind of string correct:

$$a [name of place] $$x History $$y [chronological subdivision] $$v Maps



Or does it need to be divided into 2 separate subjects:

1.     $$a [name of place] $$x History $$y [chronological subdivision]

2.     $$a [name of place] $$v Maps



Thanks for your help,



  *   Ahava

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Dr. Ahava Cohen    |Head

Cataloguing Section

Mobile: +972-54-549-3644

The National Library of Israel, Jerusalem

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