Path: csiph.com!fu-berlin.de!uni-berlin.de!individual.net!not-for-mail From: rbowman Newsgroups: comp.os.linux.advocacy,comp.os.linux.misc Subject: Re: OT Date: 20 Aug 2026 20:05:00 GMT Lines: 41 Message-ID: References: <18cc1576469d353e$143557$916528$802601b3@news.usenetexpress.com> <115spe5$ar9e$2@dont-email.me> <18cc57d1b90cd090$163871$704772$802601b3@news.usenetexpress.com> <115vhbg$16o12$1@dont-email.me> <115vmn1$18mrp$1@dont-email.me> <115vqf4$1a385$1@dont-email.me> <11653nv.12s4.1@ID-201911.user.individual.net> <11656kh$307ud$1@dont-email.me> <1167cqv.t78.1@ID-201911.user.individual.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Trace: individual.net URiPn3YrYtD5Gph37nFUrgLLHj0tYKPRDwm/m9CbKK9Pnwcjp4 Cancel-Lock: sha1:/UCeqoIht9E1z5AktvhFnsmvE40= sha256:fvm9gnrqElOU8RJyMLebwhB2jH9QgNSKLOFkL1S27Gc= User-Agent: Pan/0.165 (Kostiantynivka) Xref: csiph.com comp.os.linux.advocacy:720718 comp.os.linux.misc:90231 On 20 Aug 2026 15:41:47 GMT, Frank Slootweg wrote: > Case in point: In Queensland (Australia), we encountered a couple with > a car and caravan who were about to take a 500km detour, because the > road they were on was not on their dedicated device and they didn't dare > to continue. We could show them that the road would take them where they > wanted to go, saving them some 400km. There have been several tragic episodes in the US for the opposite reason. The GPS showed a shortcut that would require 4WD or wasn't maintained in the winter. I have placed a couple of geocaches that played off my knowing the DeLorme maps many people used didn't reflect reality. One was a bridge that had been pedestrian only since the '80s and had washed out entirely in '96. Another inexplicably showed a road leading up a ridge. There was no evidence there had ever been a road. There was a trail that would challenge a mountain goat in places. The more rural the area the less frequently the map is updated. Much of the work I did involved GIS both to locate the call for service location and to provide routing for the emergency responders. part of the task for a new site was reviewing the GIS data they submitted. Errors included different segments of a street with the same street numbers, completely different streets with the same name, street segments that failed to connect to an intersection and were not routable, and so forth. I did web map applications using the Esri API and the basemaps provided by Esri. Often when the vector data used by the site was overlaid on the basemap streets would not line up. Using OSM basemaps had the same problem, as did satellite imagery. Sometimes when traveling I'll play along with the GPS. Heading north on 93 in Las Vegas feeds you onto interstates but you swing off to the west before going east. The algorithm saw that as inefficient and directed me onto surface streets. Not only were there stop lights and more traffic but it led through parts of North LV where most people prefer not to go.