[OHM] Modifying the default renderer

[Jeff Meyer]

Mikel is right on - we don't need to wait! : )
https://github.com/OpenHistoricalMap/openstreetmap-carto

You're absolutely correct about the default (tele-tubby) style looking
funky for the Seattle data and even more correct about the need for tagging
and styling discussions.

Right now, there are a bunch of issues of with the Seattle map that
highlight OHM issues across the board:
- Modern tagging structures may not be relevant in the past - e.g. roads
vs. tracks
  -- I hacked up the core data to get around the rendering issues, but
that's not a generally good habit
- Bad coastline (not really a style sheet issue, but a problem with the
resulting output)
  -- We need to add a coastline generator process
- Dirt roads end up looking like dashed lines, even though they are the
main road
  -- And... should dirt roads have "casings"?
- The wooden pier that was the hub of much of Seattle's commercial
businesses doesn't show up
  -- I've started hacking around (very ugly style) with the OSM carto in
TileMill to fix this.
  -- see: http://i.imgur.com/CJWenXP.jpg

So... I agree: styling and tagging need to support much more than they do
now.

Want to start a tagging page for discussions on the wiki? (Or somewhere
else appropriate for collaboration?)
http://wiki.openstreetmap.org/wiki/OHM

Thanks!
Jeff



On Mon, Jun 10, 2013 at 11:09 AM, Mikel Maron <mikel_maron at yahoo.com> wrote:

> Jerry
>
> Today, we're looking at switching to the Carto stylesheet as a starting
> point, and adding in variables to filter on start_date and end_date. We'd
> manage the carto in github, so totally possible to experiment with styles.
> Will let everyone know how the sprint turns out today.
>
> -Mikel
>
> * Mikel Maron * +14152835207 @mikel s:mikelmaron
>
>   ------------------------------
>  *From:* sk53.osm <sk53.osm at gmail.com>
> *To:* historic at openstreetmap.org
> *Sent:* Monday, June 10, 2013 8:50 AM
> *Subject:* [OHM] Modifying the default renderer
>
> I've been looking at the Seattle data and feel a bit dissatisfied with how
> the data looks. I realised that my issue was the early grid being
> represented as tracks.
>
> I believe that we should try and use a functional classification of
> highways for all historical periods, and keep the actual physical condition
> (whether a residential street is a muddy trackway, a narrow alley filled
> with ordure or a stone paved road with raised sidewalks) in distinct tags.
>
> For most historical periods values of highway=motorway, trunk, motorroad
> will be irrelevant, but I think there will always be at least two classes
> of highways loosely corresponding to longer distance roads, and local
> routes: for now I would suggest continuing to use primary/secondary. I'm
> not sure that tertiary is relevant in the pre-car age. We should also
> consider whether specific tags are needed for pack-horse trails & mule
> paths: the remnants of both are common across Western Europe, usually now
> tracks or bridleways.
>
> Whatever tags are used I think the appropriate cartography for main
> highways needs to be much more muted that what I've learnt is the "Telly
> Tubby style". One potential point of inspiration is the cartography of
> older editions of the Ordnance Survey's Roman Britain map (extract here<http://www.bibliographics.com/MAPS/BRITAIN/BRIT-MAP-FRAME-25.htm>).
> WIth a single cartographic style covering multiple periods I think we
> should aim to be fairly conservative. Furthermore there are many style
> rules which can be removed.
>
> Obviously any changes should wait until the main OSM site goves over to
> the CartoCSS style sheet. However, I think it's worth kicking off a
> discussion about both tagging & cartography at this point, before too much
> data is entered. So far it's only highways which have caught my attention:
> there may be some other feature classes which need a more period-neutral
> cartography.
>
> Regards,
>
> Jerry
>
> PS. I'd love to hear a resume of the BoF session in SF.
>
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-- 
Jeff Meyer
Global World History Atlas
www.gwhat.org
jeff at gwhat.org
206-676-2347

OpenStreetMap: Mapping with a Human Touch
<http://www.openstreetmap.org/user/jeffmeyer> osm: Open Historical Map
(OHM)<http://wiki.openstreetmap.org/wiki/Open_Historical_Map>
 / my OSM user page <http://www.openstreetmap.org/user/jeffmeyer>
 t: @GWHAThistory <https://twitter.com/GWHAThistory>
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