Cartography start - Githubissues

pnorman commented 7 years ago

This is a style recently developed by @systemed - it's going to be marketed commercially by Thunderforest so not a direct basis for this project, but the sense of proportion and feature selection may be a good model to follow.

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pnorman commented 6 years ago

@systemed, when you start with something like this, where do you normally begin? I was thinking water/land colours and road scheme.

Right now I have

But I just grabbed some colours from other work to test that things were rendering.

pnorman commented 6 years ago

Fooling around with colour selection

Thoughts on this as a starting point?

pnorman commented 6 years ago

One of the big issues is figuring out how to split the road classifications. We know from osm-carto it's not possible to show 6+ distinct colours for road classifications

@systemed's example groups them as

motorway
trunk, primary (starting at middle zooms)
secondary
tertiary, residential/unclassified and below (at higher zooms)

osm-carto groups them as

motorway
trunk
primary
secondary
tertiary, residential/unclassified (width variation)

New WMF style groups them as

motorway
trunk, primary
secondary, tertiary
residential/unclassified and below

Lyrk is pushing distinguishability and groups them as

motorway
trunk
primary
secondary
tertiary, residential/unclassified (width variation)

The HOT style uses a purple motorway and does

motorway, trunk
primary
secondary, tertiary
residential/unclassified and below

OSM clear uses shifting classifications, but breaks it down into

motorway
major
lessmajor
minor

I think the two options are four classifications in a scale, or five, using blue for motorways.

matthijsmelissen commented 6 years ago

Thoughts on this as a starting point?

Nice to have a first step! I however think the colours are way too saturated. Like this, I'm afraid we will run again in the camouflage effect that we also had in osm-carto. In areas with many small forests, you'll get many patches of opposing colours. This will make it very hard to recognize other features, such as roads.

I think the two options are four classifications in a scale, or five, using blue for motorways.

I'm strongly against blue for motorways because of the confusion with rivers, and because it's hard to make a logical progression with other colors. I agree with restricting the number of colors to four or perhaps even two/three on a single zoomlevel (using style/width for dinstinction). No strong opinion on how we accomplish that.

pnorman commented 6 years ago

Nice to have a first step! I however think the colours are way too saturated. Like this, I'm afraid we will run again in the camouflage effect that we also had in osm-carto. In areas with many small forests, you'll get many patches of opposing colours. This will make it very hard to recognize other features, such as roads.

Do you feel that just the forests are too saturated, or all of the colours? I like the stronger water, and the land matches well with it.

I'm strongly against blue for motorways because of the confusion with rivers, and because it's hard to make a logical progression with other colors.

If we went with blue for motorways we'd probably need to have strong casings, which is what I normally see on those maps, and make sure that it's far enough away from water blue.

matthijsmelissen commented 6 years ago

Do you feel that just the forests are too saturated, or all of the colours?

Both the forest and water.

pnorman commented 6 years ago

I haven't adjusted the land or forests to match the water, but what do you think about this water colour?

matthijsmelissen commented 6 years ago

Might still be too saturated and not bright enough. Perhaps drawing a road thtough it will make it easier to decide?

I’d recommend testing with something patchy like the Norwegian forests.

pnorman commented 6 years ago

I adjusted colours slightly, and started roadwork

pnorman commented 6 years ago

I did a lot of staring at pages of colours today, trying to pick some. It's a different method than I've used in the past

This resulted in something more saturated than I was expecting. My first instinct was to cut back the chroma on everything by about 10%, but thought I'd post it for feedback first. I don't think there's anything wrong with high saturation on roads, it's just not what I was thinking at any one point while doing the design.

matthijsmelissen commented 6 years ago

Looks good. The main risk I see is the legibility of (city) labels rendered on top of roads. Can you post an example of that?

pnorman commented 6 years ago

Looks good. The main risk I see is the legibility of (city) labels rendered on top of roads. Can you post an example of that?

Not yet, I don't have city labels.

pnorman commented 6 years ago

The cartography is started.

pnorman / bolder

Cartography start #6