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Generic OSM Accuracy Assessment

Creators: Sean Gillies Copyright © The Contributors. Sharing and remixing permitted under terms of the Creative Commons Attribution 3.0 License (cc-by).
Last modified Oct 03, 2012 01:14 PM
OSM is a hetereogenous dataset that defies traditional assessments of accuracy, but there are good starting points

The top three sources of OpenStreetMap (henceforth OSM) data are:

  • GPS coordinates captured by users in the field
  • Digitization from maps or airborne/satellite imagery
  • Bulk import of public cadastral or street data

This particular accuracy assessment document is meant to generally describe the first two cases. For the third, we will use more specific documents such as http://pleiades.stoa.org/features/metadata/cadastre-francais. Accuracy of OSM data is also discussed in that project's wiki: http://wiki.openstreetmap.org/wiki/Accuracy.

Pleiades locations that get coordinates from OSM objects shall contain the following information.

  • As a reference, they shall cite a particular OSM object with an identifier such as http://www.openstreetmap.org/browse/node/316891115 and a citation label such as osm:node=316891115.
  • As original provenence, they shall identify the exact OSM changeset and its timestamp such as OpenStreetMap (changeset 11165466, Sat, 31 Mar 2012 12:15:28 +0000)
  • They shall use this document as positional accuracy assessment in the absence of a more specific one.

The canonical example for a Pleiades location citing OSM shall be the Tour Magne of Nemausus: http://pleiades.stoa.org/places/148142/tour-magne.

 




Location OSM location of Borgo Medievale by Jeffrey Becker — last modified Nov 04, 2016 07:33 PM
The post-Roman settlement at Alba Fucens. Location based on OpenStreetMap.
Location OSM location of Tempio Grande by Jeffrey Becker — last modified Dec 05, 2016 06:47 AM
A major urban sanctuary at Vulci with a long period of use, stretching from the archaic period into the Roman period. Location based on OpenStreetMap.
Location object code OSM location of Vito Soldano by Jeffrey Becker — last modified May 14, 2016 06:13 AM
Location based on OpenStreetMap
Location PowerPoint presentation OSM location of Casteddu di Tappa by Jeffrey Becker — last modified Jul 22, 2016 08:48 AM
Representative location based on OpenStreetMap.
Location OSM location of Tumulus F by Jeffrey Becker — last modified Jul 22, 2016 09:04 AM
Representative location based on OpenStreetMap
Location Pascal source code OSM Location of Torre de San Josep by Jeffrey Becker — last modified Jul 22, 2016 08:56 AM
Representative Location based on OpenStreetMap
Location OSM location of Ponte Romana by Jeffrey Becker — last modified Jun 16, 2016 11:16 AM
Representative location based on OpenStreetMap.
Location OSM location of Castro de Santaia by Jeffrey Becker — last modified Oct 31, 2018 05:32 PM
Representative location based on OpenStreetMap.
Location OSM location of Castromaior by Jeffrey Becker — last modified Jun 18, 2016 05:36 PM
Representative location based on OpenStreetMap.
Location location of ancient theater by Jeffrey Becker — last modified Jun 07, 2018 07:49 PM
Location based on OpenStreetMap
Location Octet Stream OSM location of Panagia by Jeffrey Becker — last modified Feb 21, 2016 07:38 AM
Representative location based on OpenStreetMap.
Location Isla Isabel II by Jeffrey Becker — last modified Nov 07, 2013 10:44 AM
Location based on OpenStreetMap
Location OSM location of Abbeyknockmoy abbey by Jeffrey Becker — last modified Jul 25, 2016 01:55 PM
Representative location based on OpenStreetMap.
Location location of Cabirus fl. by Jeffrey Becker — last modified Apr 26, 2013 06:02 AM
Location based on OpenStreetMap
Location OSM location of Gobustan State Reserve by Jeffrey Becker — last modified Jul 28, 2016 06:49 PM
Representative location based on OpenStreetMap.
Location OSM location of Roman inscriptions by Jeffrey Becker — last modified Jul 22, 2016 08:58 AM
Representative location based on OpenStreetMap.
Location ATK inset OSM location of Cairn de Barnénez by Jeffrey Becker — last modified Jul 25, 2016 01:27 PM
Representative location based on OpenStreetMap.
Location OSM location of Grange Stone Circle by Jeffrey Becker — last modified Jul 25, 2016 01:22 PM
Representative location based on OpenStreetMap.
Location OSM location of Grange stone circle 2 by Jeffrey Becker — last modified Jul 25, 2016 01:22 PM
Representative location based on OpenStreetMap.
Location OSM location of Orton Longueville by Jeffrey Becker — last modified Feb 26, 2019 07:22 AM
Location of the modern center based on a node derived from OpenStreetMap.
Location location of Kercado tumulus by Jeffrey Becker — last modified Feb 06, 2019 05:43 AM
Location based on OpenStreetMap
Location chemical/x-pdb OSM location of Alignements du Manio by Jeffrey Becker — last modified Feb 06, 2019 05:43 AM
Representative location based on OpenStreetMap
Location Troff document OSM location of Ka'ba-ye Zartosht by Jeffrey Becker — last modified Feb 21, 2019 06:31 AM
Representative location based on OpenStreetMap.
Location Octet Stream OSM location of Termas romanas de Santa María by Tom Elliott — last modified Dec 28, 2018 09:40 AM
Location via OpenStreetMap, based on geotagged photos in Flickr and Panoramio. Dates after BAtlas.
Location OSM location of Termas romanas de las Bóvedas by Jeffrey Becker — last modified Feb 06, 2019 05:45 AM
Location based on OpenStreetMap
Location OSM location of Attavyros (peak) by Ryan Horne — last modified Jan 06, 2019 12:09 PM
Representative location based on OpenStreetMap.
Location Octet Stream OSM location of Fonte dell'Acqua Paola by Jeffrey Becker — last modified Feb 01, 2019 04:18 PM
Representative location based on OpenStreetMap.
Location OSM location of Római castrum Fenekpuszta by Jeffrey Becker — last modified Jul 25, 2016 01:23 PM
Representative location based on OpenStreetMap.
Location OSM location by Jeffrey Becker — last modified Apr 20, 2014 07:35 AM
Location based on OpenStreetMap
Location OSM location of Temple of Mars by Jeffrey Becker — last modified Jul 25, 2016 01:23 PM
Representative location based on OpenStreetMap.
Location OSM location of Pont de Grésin by Jeffrey Becker — last modified Jun 22, 2016 09:59 AM
Representative location based on OpenStreetMap.
Location OSM location of Mont Vully (peak) by Jeffrey Becker — last modified Jul 25, 2016 01:54 PM
Representative location based on OpenStreetMap.
Location OSM location of modern Margeat by Jeffrey Becker — last modified Jul 25, 2016 01:24 PM
Representative location based on OpenStreetMap.
Location location of Loxa fl. by Jeffrey Becker — last modified Jun 17, 2013 12:35 AM
Location based on OpenStreetMap
Location location of Ulla fl. by Jeffrey Becker — last modified Jun 17, 2013 12:35 AM
Location based on OpenStreetMap
Location location of Sucro fl. by Jeffrey Becker — last modified Jun 17, 2013 12:37 AM
Location based on OpenStreetMap
Location location of Turia fl. by Jeffrey Becker — last modified Jun 17, 2013 12:37 AM
Location based on OpenStreetMap
Location Αιγίτιο by Ryan Horne — last modified Jun 08, 2018 06:45 AM
Location based on OpenStreetMap
Location Αγιος Ηλίας by Ryan Horne — last modified Jun 08, 2018 06:50 AM
Location based on OpenStreetMap
Location Μάστρο by Ryan Horne — last modified Jun 07, 2018 07:24 PM
Location based on OpenStreetMap
Location OSM location of Eremo di San Michele Arcangelo by Jeffrey Becker — last modified Jul 25, 2016 01:24 PM
Representative location based on OpenStreetMap.
Location Octet Stream location of Aqua Appia by Jeffrey Becker — last modified Apr 11, 2013 12:22 PM
Extant remains of above ground portions of the aqueduct. Location based on OpenStreetMap and verified in Google Earth.
Location OSM location of Brownshill Dolmen by Jeffrey Becker — last modified Jul 30, 2016 10:05 PM
Location based on OpenStreetMap
Location location of Capocorb Vell by Jeffrey Becker — last modified Aug 01, 2013 09:16 AM
Location based on OpenStreetMap
Location location of Araghju by Jeffrey Becker — last modified Jul 19, 2013 12:55 PM
Location based on OpenStreetMap
Location OSM location of La Midouze by Jeffrey Becker — last modified Jul 25, 2016 01:25 PM
Representative location based on OpenStreetMap.
Location OSM location of Shushica river by Jeffrey Becker — last modified Jul 25, 2016 01:26 PM
Representative location based on OpenStreetMap.
Location OSM location of Bussento river by Jeffrey Becker — last modified Jun 24, 2016 02:34 PM
Representative modern location based on OpenStreetMap.
Location OSM location of Selinos fl. by Jeffrey Becker — last modified Oct 27, 2017 04:49 PM
Representative location based on OpenStreetMap.
Location Kazdağı by Ryan Horne — last modified Apr 25, 2013 11:11 AM
Location based on OpenStreetMap
Location OSM location of Monte Navone by Jeffrey Becker — last modified Jul 25, 2016 05:10 PM
Representative location based on OpenStreetMap.
Location OSM location of Bug River by Jeffrey Becker — last modified Jul 25, 2016 05:11 PM
Representative location based on OpenStreetMap.
Location Octet Stream OSM location of archaeological area, including Wadi el-Atrun and Latrun by Jeffrey Becker — last modified Jul 25, 2016 05:12 PM
Representative location based on OpenStreetMap.
Location Monte Rocche by Stefano Costa — last modified Jun 25, 2015 07:51 AM
Representative point derived from Open Street Map
Location Octet Stream OSM location of Villa Selene (Roman villa) by Jeffrey Becker — last modified Aug 01, 2016 01:51 PM
Representative location based on OpenStreetMap.
Location Troff document OSM location of Henchir Krannfir by Jeffrey Becker — last modified Jul 25, 2016 05:18 PM
Representative location based on OpenStreetMap.
Location OSM location of Atrek (river) by Jeffrey Becker — last modified Oct 29, 2017 10:57 AM
Representative location based on OpenStreetMap.
Location OSM location of Zálongon by Jeffrey Becker — last modified Jul 25, 2016 05:20 PM
Representative location based on OpenStreetMap.
Location OSM location of Sillaro by Jeffrey Becker — last modified Jul 25, 2016 05:21 PM
Representative location based on OpenStreetMap.
Location OSM location of Brescello by Jeffrey Becker — last modified Jun 08, 2018 06:48 AM
Representative location based on OpenStreetMap.
Location audio/x-realaudio OSM location of modern Moura by María Jesús Redondo — last modified Oct 27, 2017 02:54 PM
Location based on OpenStreetMap
Location OSM location of Assur by Jeffrey Becker — last modified Feb 02, 2018 06:39 AM
Representative location based on OpenStreetMap
Location object code OSM location of Arquata del Tronto by Jeffrey Becker — last modified Mar 09, 2017 02:30 PM
Representative location based on OpenStreetMap
Location Octet Stream OSM location of Necropoli di Vigna Pia by Jeffrey Becker — last modified Jul 25, 2016 05:34 PM
Representative location based on OpenStreetMap.
Location location of Jazirat al-Ghanam by Jeffrey Becker — last modified Oct 12, 2013 02:21 PM
Location based on OpenStreetMap
Location location of Гумиста (Gumista) river by Jeffrey Becker — last modified Nov 24, 2013 09:48 PM
Location based on OpenStreetMap
Location Argos Orestikon archaeological site by Jeffrey Becker — last modified Jun 07, 2018 08:10 PM
Location based on OpenStreetMap
Location location of Mzymta (river) by Jeffrey Becker — last modified Nov 24, 2013 06:01 PM
Location based on OpenStreetMap
Location OSM location of Yalburt Hittite Pool by Jeffrey Becker — last modified Jul 12, 2016 10:50 AM
Representative location based on OpenStreetMap.
Location OSM location of Nuraghe Santu Pauli by Jeffrey Becker — last modified Jul 25, 2016 05:34 PM
Representative location based on OpenStreetMap.
Location location of Mincius fl. by Jeffrey Becker — last modified May 21, 2013 09:50 AM
Location based on OpenStreetMap
Location location of Askania L. by Jeffrey Becker — last modified May 21, 2013 10:05 AM
Location based on OpenStreetMap
Location OSM location of Kârum Kaneš by Jeffrey Becker — last modified Oct 11, 2016 02:29 PM
A Bronze Age merchants' quarter. Location based on OpenStreetMap
Location location of course of Iordanes fl. by Jeffrey Becker — last modified May 21, 2013 10:12 AM
Location based on OpenStreetMap
Location location of Massalia? fl. by Jeffrey Becker — last modified Oct 27, 2017 04:52 PM
Location based on OpenStreetMap
Location location of Yumuktepe by Jeffrey Becker — last modified Sep 09, 2013 07:00 AM
Location based on OpenStreetMap
Location Octet Stream OSM location of Lerna by Jeffrey Becker — last modified Jun 07, 2018 03:45 PM
Representative location based on OpenStreetMap.
Location OSM location of Narthekis Ins. by Jeffrey Becker — last modified Jun 07, 2018 05:15 PM
Representative location based on OpenStreetMap.
Location OSM location of Nisída Ágioi Pántes by Jeffrey Becker — last modified Aug 01, 2016 08:12 AM
Representative location based on OpenStreetMap.
Location D source code OSM location of Haycock island by Jeffrey Becker — last modified Aug 01, 2016 08:13 AM
Representative location based on OpenStreetMap.
Location D source code OSM location of Port-Cros island by Jeffrey Becker — last modified Aug 01, 2016 08:21 AM
Representative location based on OpenStreetMap.
Location D source code OSM location of Île de Bagaud by Jeffrey Becker — last modified Aug 01, 2016 08:22 AM
Representative location based on OpenStreetMap.
Location Octet Stream OSM location of Dragonada by Jeffrey Becker — last modified Aug 01, 2016 08:22 AM
Representative location based on OpenStreetMap.
Location object code OSM location by Jeffrey Becker — last modified Apr 19, 2014 07:25 AM
Location based on OpenStreetMap
Location OSM location of Castle Acre Priory by Jeffrey Becker — last modified Sep 27, 2018 08:29 PM
Representative location based on OpenStreetMap.
Location OSM location of Arakia? Ins. by Jeffrey Becker — last modified Sep 16, 2016 11:39 PM
Location based on OpenStreetMap
Location location of Aretias/Areonesos Ins. by Jeffrey Becker — last modified Jun 17, 2013 01:02 AM
Location based on OpenStreetMap
Location location of Aristera Ins. by Jeffrey Becker — last modified Jun 07, 2018 08:53 PM
Location based on OpenStreetMap
Location location of Beberaci L. by Jeffrey Becker — last modified Jun 17, 2013 01:27 AM
Location based on OpenStreetMap
Location location of Polytimetos fl. by Jeffrey Becker — last modified Jun 17, 2013 01:45 AM
Location based on OpenStreetMap
Location location of Orontes (river) by Jeffrey Becker — last modified Nov 04, 2013 12:41 PM
Location based on OpenStreetMap
Location Troff document location of oppidum of Entremont by Jeffrey Becker — last modified Jul 08, 2013 07:05 AM
Location based on OpenStreetMap
Location OSM location of oppidum earthwork by Jeffrey Becker — last modified Aug 20, 2016 01:37 PM
Location based on OpenStreetMap
Location OSM location of Tel Kabri Archaeological Site by Gabriel Mckee — last modified Oct 15, 2018 08:12 PM
Polygon representing the location of the Tel Kabri site, derived from an OpenStreetMap Way.
Location OSM location of Areopagus by Ryan Horne — last modified Oct 15, 2018 07:58 PM
Representative location based on OpenStreetMap
Location Octet Stream OSM Location of Modern Harbiye, Antakya by Tom Elliott — last modified Oct 22, 2018 02:02 PM
Associated modern location based on OpenStreetMap
Location Octet Stream OSM location of Qaryat al-Faw (residential area) by Gabriel Mckee — last modified Oct 26, 2018 12:51 PM
Polygon representing the fenced surrounding the residential area of the Qaryat al-Faw site, derived from an OpenStreetMap Way after Ansary 1982.
Location OSM location of Basilica di San Clemente by Jeffrey Becker — last modified Dec 15, 2016 01:37 PM
Representative location based on OpenStreetMap.
Location location of Mekestos fl. by Jeffrey Becker — last modified Oct 27, 2017 04:40 PM
Location based on OpenStreetMap
Location Octet Stream OSM location of Sacello di Venere Cloacina by Jeffrey Becker — last modified Oct 16, 2018 04:47 PM
Representative location based on OpenStreetMap