-------- Original Message --------
Subject: Re: 1:24,000--largest scale available?]
Date: Sat, 20 Mar 2004 18:00:17 -0500
From: Edward James Redmond <[log in to unmask]>
------------------
Mr. Fry:
I see you are writing from the University of Maryland - is your patron
looking for larger scale maps of the DC area? If so, perhaps the 1:4800
(I inch = 400 feet) United States Coast and Geodetic Survey set
covering DC and vicinity on our site will be of assistance? The
topographic data is circa 1892 but the contour interval is quite small.
Follow the link in the last line of the bib record below to access the
images on the LC "Map Collections" web site:
Corporate Name: U.S. Coast and Geodetic Survey.
Main Title: District of Columbia / engraved by Evans & Bartle Wash. D.C.
1892 .... 1894.
Published/Created: [Washington?] : Coast and Geodetic Survey, [1892-1894]
Related Names: Evans & Bartle.
Description: 58 maps : col. ; 35 x 35 cm. and 35 x 34 cm.
Scale Information: Scale 1:4,800. 1 in. = 400 (W 77°08 --W 76°54 /N
39°00 --N 38°47 ).
Notes: Topographic map showing lot lines, buildings, and woods.
Covers District of Columbia outside former Washington city limits
(Florida Avenue).
Relief shown by contours and hachures.
Engraver's statement does not appear on some maps.
Oriented with north toward the upper left.
Sheets numbered 1 thru 90 and No. 3101 thru No. 3190 with unused numbers.
Accompanied by sheet index map: Index of sectional maps of the District
of Columbia, city excepted, published by U.S.C. & G.S. (58 sheets). 1
sheet : neg. photocopy ; 36 x 36 cm.
Includes note.
LC sheets laminated and mounted on cloth backing.
Additional Form Avail.: Available also through the Library of Congress
Web site as a raster image.
Subjects: Washington (D.C.)--Maps, Topographic.
United States District of Columbia Washington.
LC Classification: G3850 s4 .U5
Geographic Class No.: 3850
Repository: Library of Congress Geography and Map Division Washington,
D.C. 20540-4650 USA dcu
Electronic File Info.: g3850m gct00007
http://hdl.loc.gov/loc.gmd/g3850m.gct00007
Links: http://hdl.loc.gov/loc.gmd/g3850m.gct00007
Ed Redmond
Reference Specialist
Geography and Map Division
Library of Congress
101 Independence Ave, SE
Washington, DC 20540-4650
(202) 707-8548
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>>> [log in to unmask] 03/20/04 4:17 PM >>>
-------- Original Message --------
Subject: Re: 1:24,000--largest scale available?
Date: Sat, 20 Mar 2004 14:32:12 -0600
From: Mike Flannigan <[log in to unmask]>
Organization: Southwestern Bell Internet Services
------------------
I don't think there will be any finer detail map of the area.
Your best bet might be to look into DEM (Digital Elevation
Model). They might be higher resolution than the
1:24,000 topo, but I'm not sure. Most of the free ones
are not higher resolution than the 1:24,000 topo.
I think DEM files are simply ASCII number files, so
they need to be processed to get the data out of them.
Mike Flannigan
> Subject: 1:24,000--largest scale available?
> Date: Thu, 18 Mar 2004 16:34:27 -0500
> From: Michael Fry <[log in to unmask]>
>
> ------------------
> Hi,
>
> I have a patron who needs more (elevation) detail than what's on USGS 7.5
> min. quad maps. Does such a thing exist? Does anybody produce, for example,
> a series of 1:10,000 maps?
>
> Thanks for your help.
>
> mf
> --
> Michael Fry
> Government Documents & Maps
> University of Maryland Libraries
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