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ZL3AI > APRDIG 12.12.03 10:36l 178 Lines 6564 Bytes #999 (0) @ WW
BID : 2466-ZL3AI
Read: GUEST
Subj: TAPR Digest, Dec 08, 3/3
Path: DB0FHN<DB0RGB<OK0PPL<DB0RES<ON0AR<ZL2TZE<ZL3VML
Sent: 031212/0811Z @:ZL3VML.#80.NZL.OC #:14416 [Chch-NZ] FBB7.00i $:2466-ZL3AI
From: ZL3AI@ZL3VML.#80.NZL.OC
To : APRDIG@WW
Subject: Re: New APRSdos MILE-MARK display
From: "Scott Miller" <scott@opentrac.org>
Date: Mon, 8 Dec 2003 15:23:56 -0800
X-Message-Number: 19
Except for maybe the Interstates, there really AREN'T mile markers
throughout California. You might see county markers sometimes, if you look
closely - along Harris Grade Road, for example, you'll see something like
'HGR 6' in small print. But it's not like other states where you've got
the nice green signs every mile.
As for sources, I've only been able to find national data on navigable
waterway mile markers, not highways. Some states have shapefiles, though.
I think Xastir users would be wise to investigate this, assuming Xastir can
be configured to show the proper data. There's definitely a use for mile
markers, especially when emergency services don't have any way to use
coordinates.
An example for Washington State:
http://www.wsdot.wa.gov/mapsdata/geodatacatalog/Maps/noscale/DOT_TDO/gisroadlogi
/mlepostmarkersext.htm
For anything below Federal highway level, I assume you'll need State data.
Scott
N1VG
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Subject: Re: New APRSdos MILE-MARK display
From: "Orrin Winton" <orrin06@frontiernet.net>
Date: Mon, 08 Dec 2003 15:50:39 -0800
X-Message-Number: 20
Scott, the only thing i would add to what you said about California mile
markers is this:
I see mile markers on state highways everywhere in California, but they
measure the distance from the COUNTY LINE. For what that's worth.
Orrin wn1z
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Subject: This looks promising
From: John Kraus <flyfisher452@cox.net>
Date: Mon, 08 Dec 2003 18:52:36 -0500
X-Message-Number: 21
Found this during random surfing. Anyone got any info on the company?
http://www.wi-sys.com/products/amateur_radio/7110.php
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Subject: Fw: Re: New APRSdos MILE-MARK display
From: James Washer <washer@trlp.com>
Date: Mon, 8 Dec 2003 16:10:17 -0800
X-Message-Number: 22
My experience in CA has shown many a mile marker, or mileposts as CalTrans
calls them
From the Caltrans webpage http://www.dot.ca.gov/dist4/trivia.htm which
states:
Mile post: A marker along a state highway indicating a location using the
postmile designation. This is the distance in hundredths of miles that the
given location is from the county line measuring from the south to the
north or from the west to the east. Postmiles ascend in the northerly and
easterly directions as determined by the route. South-north routes usually
have an odd number and west-east routes usually have an even number. There
are exceptions. This occurs because a route may start out as a generally
east - west - such as Route 84 in San Mateo and Alameda Counties - but
after some revisions and simplification is better defined the other way.
Route 84 now terminates near Sacramento giving it a primarily south-north
orientation. Three digit Interstates are auxiliary to longer highways, such
as 280, 580, 680 that feed to Interstate 80. These routes do not adhere to
the directional rules.
If you search for "milepost" on the CalTrans website, you'll get 1905 hits..
- jim
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Subject: Re: Fw: Re: New APRSdos MILE-MARK display
From: "Scott Miller" <scott@opentrac.org>
Date: Mon, 8 Dec 2003 16:22:18 -0800
X-Message-Number: 23
But don't most states measure from the state border? What good is a county
mile number on US 101 when it runs through most of the state, and if you're
not watching the signs you might not know what county you're in?
And how much could it really cost to go slap numbers on the exits?
Scott
N1VG
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Subject: Re: This looks promising
From: "Stephen H. Smith" <WA8LMF2@aol.com>
Date: Mon, 8 Dec 2003 16:27:23 -0800
X-Message-Number: 24
John Kraus wrote on 12/8/2003, 3:52 PM:
>Found this during random surfing. Anyone got any info on the company?
>
>http://www.wi-sys.com/products/amateur_radio/7110.php
Looks an awful lot like a TinyTrak in an aluminum case. Note that
although the description mentions "12-channel GPS included" there is no
antenna port shown in the photo or mentioned in the spec. I think they
are using an external mouse-type GPS plugged into the same serial port
that you use for programming the device on a PC; i.e. identical to the
way it is done on a TinyTrak.
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Subject: RE: DB-9 Factoid
From: Dale Blanchard <wa7ixk@arrl.net>
Date: Mon, 08 Dec 2003 17:28:40 -0800
X-Message-Number: 25
My son was just issued a new laptop computer for his job (Motorola) It is
a late IBM it has a serial port and almost every thing else you may or may
not need. Won,t record DVD's tho but has a cd burner.
Also had a docking station and spare weird shaped battery.
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Subject: Re: New APRSdos MILE-MARK display
From: Bob Bruninga <bruninga@usna.edu>
Date: Mon, 8 Dec 2003 22:43:33 -0500 (EST)
X-Message-Number: 26
The idea was that the APRSdos milemarker file for the interstates can be
used by anyone's maping program. If I missed any, anyone can simply add
it by looking at a highway map and entering a few coordinates.
On Mon, 8 Dec 2003, Scott Miller wrote:
>Except for maybe the Interstates, there really AREN'T mile markers
>throughout California.
Ah, so they still havent upgraded. Hummh. thanks. Yes, this concept is
only intended for those highways that are clearly amarked and visible to
the traveler. only the interstates meet that bill in most states...
>As for sources, I've only been able to find national data on navigable
>waterway mile markers, not highways. Some states have shapefiles, though.
>Ithink Xastir users would be wise to investigate this, assuming Xastir can
>be configured to show the proper data.
I hand edited the existing file manually over several weeks of effort with
a road atlas of every state...
>For anything below Federal highway level, I assume you'll need State data.
You only need a few data points for the whole highway. Only the mile
marks (or an exit number) where there is a change in direction..
It would be best if we just all used the same file and improved on it...
then we would all have the same reference...
de Wb4APR, Bob
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