<DIV>The setup I've been testing works very well and collects tracks and points, accuracy is 6-11 meters which is very good for in car, Trimble will give you cm accuracy which is not needed for street mapping and their unit are in the thousands of $. I have an old Garmin GPS2+ with a data cable port. These types of units are prefered for data collection by some US state agencies such as Cali. and Mich. due to ruggedness, accuracy, dataport. It contains a 12 channel sat. reciever. (tracks up to 12 satellites).</DIV> <DIV>I bought a data/power cable that plugs into the cigarette lighter an power both the Garmin and a Palm Pilot 500 series I got on Ebay for a good price. A plastic dash mount made for the Garmin keeps it in place, Velcro for the Palm on dash. I bought a new rooftop magnetic antenna that hooks by cable to the Garmins antenna port ( you remove the one that comes with, a simple twist connection), it was listed on line for 120$ but got on Ebay for $20. I use Cetus GPS palm
free/shareware to record tracks and points, it is well written and you can store a lot of data on the palm with it, when you sync to desktop you go to palm/user/archive and convert the DB using GPS TrackData--a companion APP found at the Cetus site. </DIV> <DIV>For City centers all I can contribute is that overhead orthorectified quarter quadrangles would be the best solution if you have access to them. If not the above setup was working well in a six story rock canyon this week. You could also capture known feature that have a good sat fix like intersections in parks and at the edge of the poor reception area and then use city engineering plans or ordance maps to calculate true </DIV> <DIV>distances along known orientations and aligned with knowpoints, digitize from the drawings and rubbesheet or stretch to fit known accurate intersection node data.</DIV> <DIV>Waban ,* ) <BR><B><I>openstreetmap-request@vr.ucl.ac.uk</I></B> wrote:</DIV> <BLOCKQUOTE class=replbq
style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px solid">Send Openstreetmap mailing list submissions to<BR>openstreetmap@vr.ucl.ac.uk<BR><BR>To subscribe or unsubscribe via the World Wide Web, visit<BR>http://bat.vr.ucl.ac.uk/cgi-bin/mailman/listinfo/openstreetmap<BR>or, via email, send a message with subject or body 'help' to<BR>openstreetmap-request@vr.ucl.ac.uk<BR><BR>You can reach the person managing the list at<BR>openstreetmap-owner@vr.ucl.ac.uk<BR><BR>When replying, please edit your Subject line so it is more specific<BR>than "Re: Contents of Openstreetmap digest..."<BR><BR><BR>Today's Topics:<BR><BR>1. Re: Zooming in editor moves the focus (SteveC)<BR>2. Re: Inner city accuracy (Lars Aronsson)<BR>3. Re: Inner city accuracy (Christian van den Bosch)<BR>4. Re: Inner city accuracy (Thomas Walraet)<BR><BR><BR>----------------------------------------------------------------------<BR><BR>Message: 1<BR>Date: Mon, 30 Jan 2006 12:26:13 +0000<BR>From: SteveC
<STEVE@ASKLATER.COM><BR>Subject: Re: [Openstreetmap] Zooming in editor moves the focus<BR>To: Andy Robinson <ANDY_J_ROBINSON@BLUEYONDER.CO.UK><BR>Cc: openstreetmap@vr.ucl.ac.uk<BR>Message-ID: <20060130122613.GB22743@asklater.com><BR>Content-Type: text/plain; charset=us-ascii<BR><BR>Yes upon switchover I had to also install libxml which left some time<BR>where it was returning 500's.<BR><BR>Sorry.<BR><BR>* @ 29/01/06 11:49:12 PM Andy_J_Robinson@blueyonder.co.uk wrote:<BR>> Has the libxml speedup implementation had an impact on the API call? I'm<BR>> getting 500 errors with JOSM tonight when trying to fetch the nodes and<BR>> segments. GPX points arrived ok.<BR>> <BR>> Andy<BR>> <BR>> Andy Robinson<BR>> Andy_J_Robinson@blueyonder.co.uk <BR>> <BR>> >-----Original Message-----<BR>> >From: openstreetmap-bounces@vr.ucl.ac.uk [mailto:openstreetmap-<BR>> >bounces@vr.ucl.ac.uk] On Behalf Of SteveC<BR>> >Sent: 29 January 2006
22:07<BR>> >To: Erik Johansson<BR>> >Cc: openstreetmap@vr.ucl.ac.uk<BR>> >Subject: Re: [Openstreetmap] Zooming in editor moves the focus<BR>> ><BR>> >* @ 29/01/06 02:50:27 PM erjohan@gmail.com wrote:<BR>> >> On 1/28/06, Oliver White <STREETMAP@BLIBBLEBLOBBLE.CO.UK>wrote:<BR>> >> > In the java-applet editor, when using [ and ] to zoom the map, it seems<BR>> >to<BR>> >> > return to the "start" of your current tracklog (i.e. the location it<BR>> >first<BR>> >> > showed when you selected a GPS trace and clicked "edit")<BR>> >> ><BR>> >> > Is this intentional? It takes quite a while to get back to the<BR>> >location of<BR>> >> > interest, and for those of us with an unreliable or slow internet<BR>> >connection,<BR>> >> > the applet often stops responding in the meantime.<BR>> >><BR>> >> Yes that feels like a bug, very
annoying to. I filed a report at:<BR>> >><BR>> >> http://www.openstreetmap.org/trac/ticket/132<BR>> ><BR>> >fixed.<BR>> ><BR>> >also deployed the libxml speedup.<BR>> ><BR>> >have fun,<BR>> ><BR>> >SteveC steve@asklater.com http://www.asklater.com/steve/<BR>> ><BR>> >_______________________________________________<BR>> >Openstreetmap mailing list<BR>> >Openstreetmap@vr.ucl.ac.uk<BR>> >http://bat.vr.ucl.ac.uk/cgi-bin/mailman/listinfo/openstreetmap<BR>> <BR>> <BR>> <BR>> _______________________________________________<BR>> Openstreetmap mailing list<BR>> Openstreetmap@vr.ucl.ac.uk<BR>> http://bat.vr.ucl.ac.uk/cgi-bin/mailman/listinfo/openstreetmap<BR><BR>have fun,<BR><BR>SteveC steve@asklater.com http://www.asklater.com/steve/<BR><BR><BR><BR>------------------------------<BR><BR>Message: 2<BR>Date: Mon, 30 Jan 2006 23:03:48 +0100 (CET)<BR>From: Lars Aronsson
<LARS@ARONSSON.SE><BR>Subject: Re: [Openstreetmap] Inner city accuracy<BR>To: openstreetmap@vr.ucl.ac.uk<BR>Message-ID: <PINE.LNX.4.61.0601302244470.16460@SARA.ARONSSON.SE><BR>Content-Type: TEXT/PLAIN; charset=utf-8<BR><BR>Thomas Walraet wrote:<BR><BR>> I just bought a Garmin Nüvi for my dad today (don't tell him, it's his<BR>> birthday tomorrow!)<BR><BR>Can this (very nice looking) unit (or indeed any model intended <BR>for car mounting) output tracklog files, or NMEA raw data? I <BR>found neither when I browsed through the user's manual online.<BR><BR>When I ask car radio dealers (who sell GPS receivers) about <BR>tracklog dumps they look like nobody ever asked that question. <BR>That surprises me, because I would imagine that professional <BR>drivers would be interested in getting an exact log of their daily <BR>driving.<BR><BR><BR>-- <BR>Lars Aronsson (lars@aronsson.se)<BR>Aronsson Datateknik -
http://aronsson.se<BR><BR><BR><BR>------------------------------<BR><BR>Message: 3<BR>Date: Tue, 31 Jan 2006 10:03:21 +0000<BR>From: Christian van den Bosch <CJB@CJB.IE><BR>Subject: Re: [Openstreetmap] Inner city accuracy<BR>To: openstreetmap@vr.ucl.ac.uk<BR>Message-ID: <43DF35E9.6070509@cjb.ie><BR>Content-Type: text/plain; charset=UTF-8; format=flowed<BR><BR>Lars Aronsson wrote:<BR><BR>> Can this (very nice looking) unit (or indeed any model intended <BR>> for car mounting) output tracklog files, or NMEA raw data? I <BR>> found neither when I browsed through the user's manual online.<BR><BR>I gather the Sirf Star III chipset used will talk NMEA as well as its <BR>own proprietary protocol; I don't know whether it supports any form of <BR>logging itself, or if you'd need to get a PDA doing it in real time via <BR>bluetooth, USB, RS232 cable, whatever.<BR><BR>I would presume - naively perhaps - that any GPS unit with some form of <BR>serial connection will talk to a
host in a useful way.<BR><BR>I'm trying to find out the same about the Holux 236, which is looking <BR>very cheap on eBay lately, but will be useless to me unless it does its <BR>own logging (I am _not_ mounting a PDA beside it on my handlebars...!)<BR><BR>Cheers,<BR><BR>Christian / cjb<BR><BR>http://www.cjb.ie/<BR><BR><BR><BR>------------------------------<BR><BR>Message: 4<BR>Date: Tue, 31 Jan 2006 11:14:32 +0100<BR>From: Thomas Walraet <THOMAS@WALRAET.COM><BR>Subject: Re: [Openstreetmap] Inner city accuracy<BR>To: openstreetmap@vr.ucl.ac.uk<BR>Message-ID: <43DF3888.9080609@walraet.com><BR>Content-Type: text/plain; charset=UTF-8; format=flowed<BR><BR>Christian van den Bosch a écrit :<BR>> Lars Aronsson wrote:<BR>> <BR>>> Can this (very nice looking) unit (or indeed any model intended for <BR>>> car mounting) output tracklog files, or NMEA raw data? I found <BR>>> neither when I browsed through the user's manual online.<BR>> <BR>> I would
presume - naively perhaps - that any GPS unit with some form of <BR>> serial connection will talk to a host in a useful way.<BR><BR>The Nüvi is shipped with an USB cable. But when connected to a computer, <BR>it is just detected as a hard drive. (two drives in fact : SD card and <BR>internal memory)<BR><BR><BR>There's no option on the unit config screens for tracklog...<BR><BR><BR><BR>------------------------------<BR><BR>_______________________________________________<BR>Openstreetmap mailing list<BR>Openstreetmap@vr.ucl.ac.uk<BR>http://bat.vr.ucl.ac.uk/cgi-bin/mailman/listinfo/openstreetmap<BR><BR><BR>End of Openstreetmap Digest, Vol 17, Issue 47<BR>*********************************************<BR></BLOCKQUOTE> <DIV><BR></DIV><p>
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