Am Dienstag, 19. Mai 2020, 12:33:38 CEST schrieb osm@peterrobins.co.uk:
I've been looking at OpenRailwayMap for GB, where I live. I thought at first that it was missing numerous lines, but on investigating further I find that this is because large numbers of ways have no usage tag, and it looks like OpenRailwayMap only shows lines which are not tagged as 'main' or 'branch' when you are zoomed right in. Having to edit each way separately would be a large amount of work, especially as lines often consist of multiple ways. What's the simplest way of (a) finding which ways don't currently have it, and (b) adding the appropriate tag? Without it, I fear that OpenRailwayMap is of limited use.
I'm not entirely sure if I understand your problem. It may be one of the following 3 (or something entirely different of course):
-lines with both usage as well as service are not shown: this is a tagging mistake and we force users to correct there things with that
-lines without usage are not shown at low zoom levels. Things without usage are likely minor tracks, drawing them on low zoom levels would clutter the output and slow down the renderer. If it's important, it probably _is_ a main or branch line.
-lines with some special usage values (like military) are permitted to also have service tagged, but they are currently not rendered (https://github.com/ OpenRailwayMap/OpenRailwayMap-CartoCSS/issues/7)