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Date: Wed, 5 Jun 2002 12:57:01 -0700 (PDT)
From: Sue Haffner <[log in to unmask]>
Subject: RE: Hawaii 7.5 x 15 series (1:25,000) <fwd>
Sender: Sue Haffner <[log in to unmask]>
Mark, Thanks for your response.
I wish I had the answers regarding the California 1:25,000 metric
sheets. Does anyone know if this series was an experiment that has
been abandoned? We have a few sheets from the 1980s. We have not
been able to find an index for the 1:25,000s anywhere. Has anyone
ever seen an index for *any* for the 7.5 x 15 series?
Sue Haffner
CSU Fresno
On Wed, 5 Jun 2002, Mark A. Thomas wrote:
> Sue,
>
> I think the Hawaii quads are pretty non-standard, partly because they
> tweak the boundary lines of lat and long to better center the islands
> (they won't necessarily be on the same grid as on the mainland, always
> at 0' 7.5' 15' 22.5' etc.). The fact that some are taller than 7.5 min
> of latitude is related to this (like how they sometimes have slightly
> wider or taller maps in coastal areas to keep from printing an entire
> sheet for a sliver of land).
>
> Any area should be covered by either a 7.5 min wide sheet or a 15 min
> wide sheet, but not both at the same time (except during a changeover
> when one 7.5 area has been updated but not the other half, so you have
> to keep both until they update both parts). I mean, USGS considers all
> the 1:24K and 1:25K maps the Primary series, not really two separate
> series. See their state quad indexes. I don't know what cataloging
> practice is. I'm pretty sure there was no time Hawaii was completely
> covered by the wide maps, nor any of the mainland states that have them.
>
> I think they seem to be moving back to all 7.5' wide sheets for Hawaii,
> since recently some of the wide ones were superseded by newer narrow
> ones. They seemed to keep the metric contours but revert to 1:24,000.
> You surely know more than I do regarding the 15' wide sheets in northern
> California (will they be replaced by normal ones eventually?). Same
> question for New England 15' wide sheets.
>
> --Mark
> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> Mark Thomas / [log in to unmask] / 919-660-5853, fax:919-684-2855
> Economics, Geology, Geography Bibliographer
> Map and GIS Librarian / Public Documents and Maps Department
> 025 Perkins Library / Duke University, Durham, NC 27708-0177
>
> > -----Original Message-----
> > Date: Tue, 4 Jun 2002 14:53:50 -0700 (PDT)
> > From: Sue Haffner <[log in to unmask]>
> > Subject: Re: Hawaii 7.5 x 15 series (1:25,000)
> > Sender: Sue Haffner <[log in to unmask]>
> >
> > In cataloging sheets of the provisional topo series Hawaii
> > 7.5 x 15 (1:25,000 metric), I noticed that some of the sheets
> > have in the upper margin 8 x 15 series, or 8.5 x 15 series.
> > Are these mistakes? Also, was this series ever completed? (We
> > have only 5 sheets.)
> >
> > Thanks,
> >
> > Sue Haffner
>
>
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