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

Bob Cameron bob3bob3 at skymesh.com.au
Thu Apr 22 22:49:57 UTC 2021


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./

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