Ticket #3038 (new enhancement)

Opened 4 years ago

Last modified 7 days ago

[roads] trunk rendering color is camouflaged against forest, vineyard...

Reported by: pdorange@… Owned by: mapnik-team@…
Priority: major Milestone: Wishlist
Component: mapnik Version:
Keywords: color Cc:

Description

Regarding tag scheme for highway, trunk are more important that primary. But using OSM rendering (using mapnik of osmarender) trunk are render in green. This green is not visible when the highway is in a landuse area with lot of forest or vineyard. In some area you see primary (red) and motorway (bleu) but intermediate trunk are hidden.

Some examples :

 http://osm.org/go/eqr3uCm-- : near Cognac (France) with forest and vineyards)

 http://osm.org/go/Zcn9GY5-- : north of atlanta

 http://osm.org/go/ZQu6hA2- : new-york state

I some location it's not a problem (no forest drawn) but the green continue to be more proeminent than primary (red).

I think the green color (used also by osmarender and cloudmade) is not the most appropriate ; green is a widly used color for landuse and natural. Perhaps another color for trunk or a really dark green ?

I compare the color scheme with some other (commercial) and no one seems to use green for highway : only variations around red, yellow, white, black, grey and blue. Some commercial map used two color for big highway (like motorway and trunk) : red/blue, red/yellow, blue/red... stripping on the perpendicular direction of the highway : its seems really fine and expressive for big road.

Change History

comment:1 Changed 3 years ago by progysm@…

We have the same problem in Quebec and Ontario and with others provinces since we can now import Canvec (official national data in osm format) data into OpenStreetMap.

Examples: road #117 in Quebec : http://www.openstreetmap.org/?lat=46.674&lon=-75.182&zoom=10&layers=M road #7 in Ontario: http://www.openstreetmap.org/?lat=44.533&lon=-77.36&zoom=10&layers=M road in British-Colombia: http://www.openstreetmap.org/?lat=55.36&lon=-123.3&zoom=8&layers=M

comment:2 Changed 3 years ago by progysm@…

comment:3 Changed 21 months ago by Harry Wood

  • Summary changed from trunk rendering color do camouflage with forest, vineyard... to trunk rendering color is camouflaged against forest, vineyard...

comment:4 Changed 21 months ago by Harry Wood

I agree this is a problem. Mentioned on IRC today. It's particularly bad at zoom levels <10 when there is no casing rendered. e.g. here in Japan at z11 the green roads a pretty much invisible at the moment.

progysm suggests making trunk roads darker, which might work, but we don't want them a yucky dark bottle green colour. Making landuse colours paler would also help. I reckon the map would look better if all landuse had lighter less powerful colours.

comment:5 Changed 17 months ago by Shoorick

OsmAnd  http://osmand.net/ draws trunks with red-violet color #de1042 (OSM Vector Maps, Day mode). These trunks are visible in forest, even during driving.

See  http://osmand.cz/wp-content/gallery/novinky081/screenshot_2012-07-17-12-48-19.png (large screenshot with trunk, 720×1280 pixels)

Samples of colors from this style:

⋅ #ffffb5 yellow for tertiaries ⋅

,

⋅ #ffd6a4 orange for secondaries ⋅

,

⋅ #ef9a9c pink for primaries ⋅

,

⋅ #de1042 red-violet for trunks ⋅

,

⋅ #a58efd blue for motorways ⋅

and

⋅ #c5f6c5 green for wood ⋅

Maybe this red-violet is good for trunks in Mapnik too?

comment:6 follow-up: ↓ 7 Changed 5 months ago by Richard

"I compare the color scheme with some other (commercial) and no one seems to use green for highway"

You mean apart from Ordnance Survey, Mapquest, and ViaMichelin?, all of whom use green for UK trunk roads (I just checked)?

comment:7 in reply to: ↑ 6 Changed 5 months ago by pdorange@…

Replying to Richard:

"I compare the color scheme with some other (commercial) and no one seems to use green for highway"

You mean apart from Ordnance Survey, Mapquest, and ViaMichelin?, all of whom use green for UK trunk roads (I just checked)?

I've not checked all commercial maps around the whole world, i just said "some other ... no one seems" ; but i just also checked and MapQuest? and ViaMichelin? use red for highway for France map. And yes, around London they use green but i also note that forest in a very light green and highway remain very visible, no problem.

The problem a initially describe is a visibility problem between highway and forest, not a green problem.

) and they do they display forest in a very light green, so red on light green is very visible, no problems.

For France :  http://mapq.st/IfvH3J

comment:8 Changed 7 days ago by math1985

  • Summary changed from trunk rendering color is camouflaged against forest, vineyard... to [roads] trunk rendering color is camouflaged against forest, vineyard...
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