Missing linecap image for LineSymbolizer

[der-stefan]

For a better rendering of bridges, tunnel entrances or mountain passes, I miss the option to have a linecap image.
Done with GIMP, it could look like this:

[springmeyer]

Using a MarkersSymbolizer on the first or last vertex would likely work so I presume this will be possible once #2295 lands. Let me know if you can test.

[springmeyer]

also would be great to see a before image so I can tell exactly what you added in gimp.

[der-stefan]

Sorry, here is a before/after image as an animated gif:

[dieterdreist]

2014-07-30 11:09 GMT+02:00 der-stefan notifications@github.com:

Sorry, here is a before/after image as an animated gif:
[image: brcke]
https://cloud.githubusercontent.com/assets/3618939/3747040/3c0a366c-17c9-11e4-9455-4dfc34cb73b7.gif

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#2122 (comment).

this is nice. I think it could be interesting for the main style as well!

[dieterdreist]

sorry, was too fast. I think in real (osm) world scenarios this still will have some problems, because we tend to split ways for several reasons, e.g. with a maxspeed change in the middle of the bridge it would be split...

[der-stefan]

You would need to have some kind of intelligent database queries to find the start node and end node of a bridge. By drawing the linecaps beneath the road with its outline, nothing could be hidden behind it.
I think this can be solved satisfactorily for real wold scenarios (like osm or our OpenTopoMap).

[springmeyer]

#2338 has now landed in Mapnik 3.x / master. Please feel free to test this (the new vertex-first and vertex-last placement options for markers). Open new issues if you find anything needs improved.

[der-stefan]

Thank you very much for this feature! This makes the rendering of bridges very nice.