Return-Path: Received: from post.thorcom.com (post.thorcom.com [195.171.43.25]) by mtain-dk05.r1000.mx.aol.com (Internet Inbound) with ESMTP id 119D6380001B7; Fri, 16 Mar 2012 08:44:50 -0400 (EDT) Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1S8WV4-0006At-LJ for rs_out_1@blacksheep.org; Fri, 16 Mar 2012 12:43:18 +0000 Received: from [195.171.43.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1S8WV4-0006Ak-4x for rsgb_lf_group@blacksheep.org; Fri, 16 Mar 2012 12:43:18 +0000 Received: from mout2.freenet.de ([195.4.92.92]) by relay1.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1S8WV3-0000GE-IG for rsgb_lf_group@blacksheep.org; Fri, 16 Mar 2012 12:43:18 +0000 Received: from [195.4.92.142] (helo=mjail2.freenet.de) by mout2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (port 25) (Exim 4.76 #1) id 1S8WV2-00023U-Lb for rsgb_lf_group@blacksheep.org; Fri, 16 Mar 2012 13:43:16 +0100 Received: from localhost ([::1]:50098 helo=mjail2.freenet.de) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1S8WV2-0007p7-Ht for rsgb_lf_group@blacksheep.org; Fri, 16 Mar 2012 13:43:16 +0100 Received: from [195.4.92.21] (port=51039 helo=11.mx.freenet.de) by mjail2.freenet.de with esmtpa (ID dl4yhf@freenet.de) (Exim 4.76 #1) id 1S8WT5-0006sN-RY for rsgb_lf_group@blacksheep.org; Fri, 16 Mar 2012 13:41:15 +0100 Received: from blfd-4db01c53.pool.mediaways.net ([77.176.28.83]:1447 helo=[192.168.178.22]) by 11.mx.freenet.de with esmtpsa (ID dl4yhf@freenet.de) (TLSv1:CAMELLIA256-SHA:256) (port 465) (Exim 4.76 #1) id 1S8WT5-0006Ub-J4 for rsgb_lf_group@blacksheep.org; Fri, 16 Mar 2012 13:41:15 +0100 Message-ID: <4F6334EA.2070903@freenet.de> Date: Fri, 16 Mar 2012 13:41:14 +0100 From: wolf_dl4yhf User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org References: <4F6252C6.2030408@iup.uni-heidelberg.de> In-Reply-To: X-Spam-Score: 1.4 (+) X-Spam-Report: autolearn=disabled,RATWARE_GECKO_BUILD=1.426 Subject: Re: LF: Google maps update - Margin Of Error? Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false x-aol-global-disposition: G X-AOL-SCOLL-SCORE: 0:2:417774432:93952408 X-AOL-SCOLL-URL_COUNT: 0 x-aol-sid: 3039ac1db4094f6335c22717 X-AOL-IP: 195.171.43.25 X-AOL-SPF: domain : blacksheep.org SPF : none Don't trust google. There are rumors that their maps are deliberately skewed slightly, which allows them to prove if any map is based on their online map database. If you can, let your GPS receiver run for a few hours (or, better, days), and make an average to get a *precise* location. You can do that graphically with a GPS track plotter. This way you can eliminate some of the GPS errors, at least since SA ("selective availability") has been turned off years ago. Cheers, Wolf . Am 16.03.2012 11:55, schrieb Clive Lorton: > On 15 Mar 2012, at 20:36, Stefan Schäfer wrote: > >> now the locator has slightly changed. The actual antenna is now in JN49IK00WE. Damn, now all the distances must be re-calculated ;-) > > > Morning LF from a lurker…. > > I just checked my GPS against a well defined mark on my drive in Oxfordshire and it was spot on. But when I visited my friends house in Southern Brittany last year there was a 22 (ish) meter error between google and my GPS. Which is right. Which should we use. > > 73 to you all > Clive g8poc > > > > > > >