[talk-au] General au OSM errors that come up in mkgmap

[Warin]

On 23/4/21 8:49 am, Bob Cameron wrote:
>
> For interest only. The weblink below is for a site that creates Garmin 
> navigating device maps based on OSM data and in the process generates 
> an error list that affect routing etc.
>
> https://alternativaslibres.org/errors/errors_Australia.zip
>
> Partial of the readme included in fileset;
>
> /This is a short description of the errors listed in the files 
> contained in errors.zip. All these errors can cause routing to fail or 
> that some elements in the map are not displayed correctly. For each 
> error listed, ID of the wrong element and a link to download the area 
> into JOSM or view it in a web browser is given. If you want to improve 
> the quality of the maps, please spend some time fixing some of these 
> errors.//
> /
>
> /Roundabouts.txt: Roundabout XXX starts/ends/forks at...: indicates 
> that a way or a set of ways tagged as junction=roundabout is/are not 
> closed or has a portion going out/coming in the roundabout.
> /
>
> /Flares.txt: this file groups different problems affecting the roads 
> that connect a roundabout with other roads.//
>
> Arcs.txt: Similar arcs XXX and YYY at...: indicates that XXX and YYY 
> ways are overlapping.//
>
> Oneway_roads.txt: this file groups different problems affecting oneway 
> roads, going to/coming from nowhere.//
>
> Turn_restriction.txt: this file groups different problems affecting 
> turn restrictions. Problems can be the lack or excess of any of the 
> turn restrictions elements or some of them not connecting the others.//
> //
> Motorway_exits.txt: motorway_junction nodes must be placed on roads 
> with a ref tag, in order to process them correctly as motorway exits. 
> This file collects those motorway exits positioned on ways lacking ref 
> tag.//
> //
> Multipolygon.txt: errors in relations of type multipolygon or 
> boundary, such as intersecting ways, polygons with rol inner that are 
> not inside a polygon with role outer, multipolygons which elements 
> don't make a closed polygon, etc.//
> //
> HouseNumbers.txt: errors related to house numbers. This information is 
> necessary in order to be able to search by addresses./
>


There are lots of them.. :(

You can also use the QA tools

https://www.keepright.at/report_map.php?zoom=14&lat=-33.lon=151.

http://osmose.openstreetmap.fr/en/map/#zoom=7&lat=-33.684&lon=147.766&item=xxxx&level=1&tags=&fixable=&overlays=FFFFFFFFFFFFFFFFFFFFT

https://tools.geofabrik.de/osmi/?view=areas&lon=145.45605&lat=-30.87017&zoom=6


Many days can be spent fixing and removing 'errors'.


I mainly concentrate on osminspector - area as that is where I usually 
cause problems myself.

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