-------- Original Message --------
Subject: Re: MAPS-L Digest - 21 Aug 2008 to 22 Aug 2008 (#2008-139)
Date: Mon, 25 Aug 2008 12:18:22 -0700
From: Colin Kelly <[log in to unmask]>
To: Maps, Air Photo & Geospatial Systems Forum <[log in to unmask]>
Xiaohong,
I have tried to scan mylar-like aerials with not much luck. Just like the scanning of negs involves a film scanner, this might involve the a similar apparatus. I looked at the specs of your scanner and wasn't sure if it has the inherent capability or whether there's a device that will allow scanning of large, half-tone mylar transparencies. You might want to give any of the folks below a call and see what they advise.
http://www.asprs.org/wgl/sustain.htm
Good Luck.
Colin Kelly
U of O APRS Coordinator
Automatic digest processor wrote:
> There are 5 messages totalling 374 lines in this issue.
>
> Topics of the day:
>
> 1. USGS 7.5 minute topos offered up
> 2. Aerial Photos Scanning Parameters Question
> 3. average world wide elevation
> 4. Duplicates available August 2008
> 5. average world wide elevation - hypsometric curves
>
> ----------------------------------------------------------------------
>
> Date: Fri, 22 Aug 2008 08:50:33 -0500
> From: Maps-L Moderator <[log in to unmask]>
> Subject: USGS 7.5 minute topos offered up
>
> -------- Original Message --------
> Subject: USGS 7.5 minute topos offered up
> Date: Thu, 21 Aug 2008 17:09:09 -0700
> From: Jane Ingalls <[log in to unmask]>
> To: [log in to unmask]
>
>
>
> We've got the following duplicates to give away. Preference to US
> libraries, who will take entire state(s). No reimbursement necessary.
> Please include your shipping address.
>
> Alabama (40 maps)
> Arizona (41 maps)
> Arkansas (7 maps)
> California (48 maps)
> Connecticut/Rhode Island:Voluntown (1 map)
> Delaware:Bethany Beach (1 map)
> Idaho (86 maps)
> Kentucky/Ohio:Greenup (1 map)
> Louisiana (20 maps)
> Maine:Portland West (1 map)
> Michigan (3 maps)
> Montana/South Dakota (2 maps)
> New Mexico (2 maps)
> New York:Ellicottville (1 map)
> North Dakota:Ice Box Canyon (1 map)
> Ohio (43 maps)
> Oklahoma:Mingo (1 map)
> Oregon (47 maps)
> Pennsylvania (2 maps)
> South Dakota (17 maps)
> Utah (201 maps)
> Virginia:Spring Garden (1 map)
> Washington (36 maps)
> West Virginia (7 maps)
> Wisconsin (70 maps)
>
>
>
> Jane Ingalls, Assistant Map Librarian
> Branner Earth Sciences Library
> 201 Mitchell Bldg.
> 397 Panama Mall
> Stanford, CA 94305-2174
>
> ------------------------------
>
> Date: Fri, 22 Aug 2008 08:50:54 -0500
> From: Maps-L Moderator <[log in to unmask]>
> Subject: Aerial Photos Scanning Parameters Question
>
> -------- Original Message --------
> Subject: Aerial Photos Scanning Parameters Question
> Date: Fri, 22 Aug 2008 08:46:35 -0500
> From: Xiaohong Zhang <[log in to unmask]>
> To: <[log in to unmask]>
> CC: David C. Clark <[log in to unmask]>
>
>
>
>
> Dear Colleagues,
>
> We have a series of aerial photos (approximately 6,825) printed on
> translucent sheets (mylar?) that we wish to archive using a large-format
> scanner (Vidar HD3630). Our purposes are to:
>
> 1. To create a digital archive of this unique resource;
> 2. To have the digital files serve as the source of our prints so
> that we are no longer sending out the mylars; and
> 3. To create a geo-referenced “mosaic” of each year’s imagery for use
> with GIS mapping software (i.e. ArcMap or ArcIMS).
>
> The “problems” with these aerial photos include:
>
> - Our agency has traditionally sent out the photos to a reproduction
> company that would make prints using the diazo process. Some of these
> images have been sent out numerous times for printing, and as a result
> have scratches and creases.
>
> - With the exception of some of our newer images (which are
> continuous-tone), all of the images appear to be halftone, although I
> don’t see the variation on dot size that I would expect. When looking at
> them on a light table, there appear to be roughly 64 dots per inch. I do
> not know if they are “true” half-tone, or if it is some other method
> which is optimal for printing using the diazo process.
>
> - The mylar sheets measure 34” x 34”. The photographic image area is 30”
> x 30”, but we also need title and other information at the top and
> bottom of each sheet.
>
> - We do not possess the negatives from any of these sets; they were
> retained by the various firms that conducted the flights.
>
> My question:
>
> Does anyone have experience with these types of aerial photos? If so, do
> you have any recommendation on what would be the best parameters? (Our
> proposal is TIFF, Greytone, 400 DPI)
>
> Thanks a lot for your help!
>
> Best regards,
>
> Xiaohong
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> XIAOHONG ZHANG
>
> Data Librarian/Metadata Specialist
>
> Chicago Metropolitan Agency for Planning (CMAP)
>
> 233 S Wacker Drive,
>
> Suite 800, Sears Tower
>
> Chicago, IL 60606
>
> (312) 386-8719 (voice)
>
> (312) 676-7453 (fax)
>
> Email:[log in to unmask]
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
> ------------------------------
>
> Date: Fri, 22 Aug 2008 13:02:45 -0500
> From: Maps-L Moderator <[log in to unmask]>
> Subject: average world wide elevation
>
> -------- Original Message --------
> Subject: average world wide elevation
> Date: Fri, 22 Aug 2008 13:55:46 -0400
> From: Lisa Sweeney <[log in to unmask]>
> To: [log in to unmask]
>
>
>
> Someone was asking for the average elevation above MSL (mean sea level)
> of land worldwide.
> If any of you know the answer or have a favorite source for this type of
> questions please share.
>
> thanks
> lisa
>
> --
> *********************************
> Head, GIS Services, MIT Libraries
> http://libraries.mit.edu/gis/
> 617-258-5598
>
> ------------------------------
>
> Date: Fri, 22 Aug 2008 13:46:05 -0500
> From: Maps-L Moderator <[log in to unmask]>
> Subject: Duplicates available August 2008
>
> -------- Original Message --------
> Subject: Duplicates available August 2008
> Date: Fri, 22 Aug 2008 13:42:14 -0500
> From: Carol Russell <[log in to unmask]>
> To: <[log in to unmask]>
>
>
>
> Hi Maps-Lers:
>
>
>
> Map duplicates offered to libraries (only):
>
>
>
> Must supply full institutional address. Please respond by September 30,
> 2008.
>
>
>
> Postage reimbursement required for packages over $10.00 or overseas packages
>
>
>
>
>
>
>
> Carol Russell, Walter Geology Library, University of Texas at Austin
>
>
>
> (respond to e-mail address below)
>
>
>
> [log in to unmask] <mailto:[log in to unmask]>
>
>
>
> ========================================================================
>
>
>
> Maps duplicate list August 2008
>
>
>
>
>
> *Sedimentary basins of the world. 1980. 1:40,000,000.*
>
>
>
> Tectonic map of North America /by William R. Muehlberger. 1992.
> 1:5,000,000. SW &SE sheets.
>
>
>
> *Tectonic map of North America. /by Philip Burke King. 1969.
> 1:5,000,000. 1 map on 2 sheets.*
>
> * *
>
> United States /compiled by the Geological Survey. 1972. 1:2,5000,000. 1
> map on 2 sheets.
>
>
>
> Geologic map of Florida. 1981. 1:500,000.
>
>
>
> *Fischer quadrangle, Texas—Comal Co. Topo. 1989. 1:24,000 . 4 copies.*
>
> * *
>
> *Webbville quadrangle, Texas. Topo. PR-1987. *
>
>
>
> Carta geologica (Mexico) 1:1,000,000. 1a ed. 1980. Sheet 3, Monterrey
>
>
>
> *Carta de ordenamiento del territorio del Estado de [name of state]
> (Mexico). 1981. Scales differ. 31 sheets.*
>
>
>
> *Geologic-tectonic map of the Caribbean region.1980. 1:2,500,000. 1map
> on 3 sheets. 2 copies.*
>
>
>
> *Mapa geológico estructural de Venezuela. 1984. 1:2,500,000. *
>
> * *
>
> *Mapa metalogenético de América Central. Metallogenic map of Central
> America. 1969. 1:2,000,000. 1 map on 2 sheets.*
>
> * *
>
> * Mapa tectonico, norte de America del sur. 1978. 1:2,500,000. 1 map on
> 2 sheets.*
>
> * *
>
> *Mapa hidrogeológico **‪**(Base preliminar**‪**) de la República
> Argentina. 1963. 1:5,000,000***
>
> * *
>
> *Carte métallogénique de l'Europe. 1^st Ed. 1968-1973. Sheet 7 of 9 only.*
>
> * *
>
> *Geological and structural map of Eastern Asia. 1988. 1:2,500,000. 6
> sheets*
>
> * *
>
> Geology of Australia. 1976. 1:2,500,000 .1 map on 4 sheets
>
>
>
> Tectonic map of the Scotia Arc. Edition 1 (1985). 1:3,000,000. 4 copies.
>
> * *
>
> *Total magnetic anomaly map, Victoria Land – Ross Sea, Antarctica :
> GANOVEX IV 1984-85. 1987. 1:250,000. 7 sheets.*
>
> ------------------------------
>
> Date: Fri, 22 Aug 2008 14:55:22 -0500
> From: Maps-L Moderator <[log in to unmask]>
> Subject: Re: average world wide elevation - hypsometric curves
>
> -------- Original Message --------
> Subject: Re: average world wide elevation - hypsometric curves
> Date: Fri, 22 Aug 2008 14:47:38 -0500
> From: James R. Carter <[log in to unmask]>
> To: [log in to unmask]
>
>
>
>
> I cannot give you that number which is rather meaningless, but the question
> should be framed in terms of the hypsometric curve for the earth. Do a web
> search on that and you will get many views of the graph that shows the
> cumulative portion of the Earth's surface above or below any
> elevation. Such curves also include depths below sea level. Hypsometric
> curves are common in physical geography and geology textbooks.
>
> Jim Carter
>
> At 8/22/2008, you wrote:
>
>> -------- Original Message --------
>> Subject: average world wide elevation
>> Date: Fri, 22 Aug 2008 13:55:46 -0400
>> From: Lisa Sweeney <[log in to unmask]>
>> To: [log in to unmask]
>>
>> Someone was asking for the average elevation above MSL (mean sea level)
>> of land worldwide.
>> If any of you know the answer or have a favorite source for this type of
>> questions please share.
>>
>> thanks
>> lisa
>> --
>> *********************************
>> Head, GIS Services, MIT Libraries
>> http://libraries.mit.edu/gis/
>> 617-258-5598
>>
>
> ---------------------------------------------------------------------
> Dr. James R. "Jim" Carter, Emeritus Professor
> Geography/Geology Department
> Illinois State University, Normal, IL 61790-4400 USA
> -- http://www.ilstu.edu/~jrcarter --
> tel: (309) 438-2833 fax: (309) 438-5310
> [log in to unmask]
>
> and President, Normal Rotary Club, 2006-07
> ----------------------------------------------------------------------
>
> ------------------------------
>
> End of MAPS-L Digest - 21 Aug 2008 to 22 Aug 2008 (#2008-139)
> *************************************************************
>
>
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