Subject:	RE: expressing scale of raster data for classification
Date:	Mon, 7 Apr 2014 23:16:44 +0000
From:	Ratliff, Louise <[log in to unmask]>
To:	'Maps, Air Photo, GIS Forum - Map Librarianship' <[log in to unmask]>

Jon,

I may be mistaken, but I believe we could supply a verbal scale statement similar to what you say below. Personally, I would include it in brackets because it is supplied from a source outside of the resource. I would also include a note to say where the information came from, e.g., scale supplied by cataloger based on ….

But seriously, if you were explaining the “scale” aspect of such a map, what would you say? Would you say it has a “nonlinear” scale, or what?

--Louise

Louise Ratliff

Social Sciences and Map Catalog Librarian

UCLA Library Cataloging & Metadata Center

11020 Kinross Ave.

Box 957230

Los Angeles, CA 90095-7230

(310)206-5853

From: Maps, Air Photo, GIS Forum - Map Librarianship [mailto:[log in to unmask]] On Behalf Of Angie Cope, American Geographical Society Library, UW Milwaukee
Sent: Monday, April 07, 2014 2:35 PM
To: [log in to unmask]
Subject: expressing scale of raster data for classification

-------- Original Message --------

Subject:	expressing scale of raster data for classification
Date:	Mon, 07 Apr 2014 14:33:24 -0700
From:	Jon Jablonski <[log in to unmask]>
Reply-To:	[log in to unmask]
To:	Maps, Air Photo, GIS Forum - Map Librarianship <[log in to unmask]>

A question for you catalogers out there.

When creating LC class numbers for serial maps, we would generally

follow the form:

G 3201s E2 var E3 yyyy

This would be a call number for a serial population map produced by

Eastview, and each edition, since it's an annual, would be given a year

extension on the end.  BUT:  this is the LandScan dataset.  The scale is

not at all variable.  And it's certainly not 'scale not given' (which is

how UC decided to catalog the online version).  The scale is 30 arc

seconds, or approximately 1 square kilometer pixels near the equator.

All raster data is going to have scale given like this.  There is no

ratio scale.  So how should we express the scale in a call number?

I realize this is somewhat academic, but let's pretend I need to put a

call number on a DVD and I have no choice but to classify this in the

map call number range and I really don't want to break the

classification system.

--

Jon Jablonski

Map & Imagery Laboratory

Davidson Library

UC Santa Barbara

805-893-4049                     library.ucsb.edu/mil