Five messages are combined into one message below.
Moderator, Maps-l
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-------- Original Message --------
Subject: RE: [BUSLIB-L] Help from a Geography librarian...]
Date: Fri, 20 Aug 2004 16:13:34 -0500
From: [log in to unmask]
Go to www.topozone.com
Find first location and click the red cursor down on the point.
The map will redraw, then write down the UTM coordinates shown above
the map display.
Go to the second location and repeat the process to get the second
coordinate.
THE COORDINATES MUST BE in the same UTM zone.....
Using simple right triangle geometry solve for the length of the
hypotenuse.
Take the total length and divide it by 5280 to get distance in miles.
The coordinates are in feet.
Bill
---- Original Message ----
From: [log in to unmask]
To: [log in to unmask],
Subject: RE: [BUSLIB-L] Help from a Geography librarian...]
Date: Fri, 20 Aug 2004 16:26:55 -0400
>-------- Original Message --------
>Subject: FW: [BUSLIB-L] Help from a Geography librarian...
>Date: Fri, 20 Aug 2004 13:20:37 -0700
>From: Kollen, Chris <[log in to unmask]>
>To: [log in to unmask]
>
>------------------
>Hi:
>
>Anyone know the answer to the following question? I already asked
>her if
>she has access to GIS software and she does not. She's looking for
>something on the web. She is in San Francisco, so I could refer her
>to UC
>Berkeley Map Collection!
>
>Chris
>
>Chris Kollen, Geography and Sociology Librarian
>University of Arizona Library
>P.O. Box 210055
>Tucson, AZ 85721-0055
>(520) 621-4869
>[log in to unmask]
>
>
>-----Original Message-----
>From: Reynolds, Camille [mailto:[log in to unmask]]
>Sent: Friday, August 20, 2004 12:43 PM
>To: [log in to unmask]
>Subject: [BUSLIB-L] Help from a Geography librarian...
>
>Apologies for cross-posting.
>
>I'm trying find a resource which will calculate the radius distance
>from an
>specific address. We are trying to determine if two addresses are
>within a
>35 mile radius of each other. Mapping services like mapquest etc.
>won't
>work because it calculates the distance via roads not the true
>distance "as
>the crow flys".
>
>I've checked the Librarian's index to the internet, my local public
>library
>and the USGS and Census Bureau's websites and searched the Stumpers
>archives
>but am not sure if I'm even using the right terminology in searching
>for
>this as I'm way out of my normal area of expertise. And of course
>this is a
>"needed it yesterday" assignment.
>
>Any suggestions or guidance are greatly appreciated.
>
>Thanks,
>
>Camille D. Reynolds, MLS
>Librarian
>
>Nossaman Guthner Knox & Elliott LLP
>50 California St. 34th Floor
>San Francisco, CA 94111
>Direct: 415-438-7207
>Fax: 415-398-2438
>Sacramento Direct: 916-930-7710
>
>PLEASE NOTE: The information in this e-mail is privileged,
>confidential and
>protected from disclosure. If you have received this e-mail in error
>or are
>not the intended recipient, you may not use, copy or disclose this
>message
>or any information contained in it to anyone. Please notify the
>sender by
>reply e-mail and delete the message. Thank you.
>
>
>= - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - = - =
>If you ask for help, it is your duty to summarize your findings so
>your colleagues on BUSLIB-L may learn from your findings.
>
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This may be a repeat, but using a Google search ("air miles" map
distance calculator) I found the following:
http://www.indo.com/distance/
Travel company that provides an application that uses US Census data to
do air miles - based on program from USGS. Default option is for city to
city, but it will also allow you to put lat/long numbers in, which may
help to pinpoint locations.
So, where to get lat/long numbers? Here are a couple options:
1-- Gazetteers work fine at getting the lat/long of places with names -
GNIS page @ USGS - http://geonames.usgs.gov/ If she lives in San
Francisco, perhaps pick a geographical feature nearby? (Corona Heights
(Playground) for the Inner Haight or upper Castro, for example).
2-- MapTech's MapServer (listed through the USGS's map partners' web
site) takes GNIS place names, brings up the USGS topo map, and the
cursor becomes an interactive hotspot on the map giving lat/longs for
any point in view. Try Corona Heights/State: California here, and see
how it works....
Then use these for input points on the indo.com distance calculator.
I'm sure that someone else on this list has come up with a more elegant
path for this info, but this is what I could find in my first couple
passes. Best of luck with this query; did anyone come up with a one-stop
solution?
Liz Paulus
Portland, OR (used to be from SF)
[log in to unmask]
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One more idea --
Regarding finding distance between two points (using lat/longs) - the
previously suggested http://www.indo.com/distance site rounds up or down
to the nearest mile. For more accuracy, try the FCC's site -
http://www.fcc.gov/mb/audio/bickel/distance.html. Select "Distance via
the Great Circle Method".
Hope this helps -
Liz
[log in to unmask]
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You might try entering both addresses at http://geocoder.us/ and then
calculating the distance between the points using the returned
latitude/longitude points at
http://www.wcrl.ars.usda.gov/cec/java/lat-long.htm. This should give
you an acceptable distance estimate.
Best Regards,
John Novak
[log in to unmask]
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Given the ability to determine the Lat & Long for the 2 points a program
to calculate the distance between those 2 points should put you within a
reasonable error margin
[log in to unmask]
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