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[Mapnik] Motorway_junctions not in Mapnik #772

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openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments
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[Mapnik] Motorway_junctions not in Mapnik #772

openstreetmap-trac opened this issue Jul 23, 2021 · 3 comments
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Component: mapnik Priority: minor Resolution: fixed Type: enhancement
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Reporter: Skywave
[Submitted to the original trac issue database at 2.22pm, Friday, 21st March 2008]

Motorway_junctions would be nice to mapnik, they are pretty much the only way of navigation on motorways. Render suggestion, z14+. Black dot with ref number in it, next to it name of the junction.
@openstreetmap-trac openstreetmap-trac added this to the Wishlist milestone Jul 23, 2021
@openstreetmap-trac openstreetmap-trac self-assigned this Jul 23, 2021
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Author: Skywave
[Added to the original trac issue at 10.06pm, Wednesday, 26th March 2008]

Thanks you added it, but maybe this will improve it even more:

 <Rule> 
 	Filter>[highway] = 'motorway_junction'</Filter> 
 	<MaxScaleDenominator>500000</MaxScaleDenominator> 
 	<MinScaleDenominator>20000</MinScaleDenominator> 
 	<TextSymbolizer name="name" face_name="DejaVu Sans Book" size="9" fill="#6666ff" halo_radius="1" wrap_width="12"/> 
 	<TextSymbolizer name="ref" face_name="DejaVu Sans Book" size="9" fill="#6666ff" halo_radius="1" wrap_width="12" dy="14" min_distance=10/> 
</Rule> 
<Rule> 
 	<Filter>[highway] = 'motorway_junction'</Filter> 
 	<MaxScaleDenominator>20000</MaxScaleDenominator> 
 	<TextSymbolizer name="name" face_name="DejaVu Sans Book" size="13" fill="#6666ff" halo_radius="1" wrap_width="12"/> 
 	<TextSymbolizer name="ref" face_name="DejaVu Sans Book" size="13" fill="#6666ff" halo_radius="1" wrap_width="12" dy=14 min_distance=10/> 
</Rule>

I haven't tested this in my mapnik setup, so you should check it first. But this should avoid that the refs are not rederend. The min_distance should avoid that you will get the save label twice like here http://www.openstreetmap.org/?lat=43.5957&lon=3.9158&zoom=13&layers=B0FT . In the same example you will see that the refs are not rendered while they are tagged

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Author: rjtehpwn[at]gmail.com
[Added to the original trac issue at 6.43pm, Tuesday, 1st April 2008]

Sorry to disturb you again but i have been tweaking this code in my local mapnik server and came up with this

    <Rule>
      <Filter>[highway] = 'motorway_junction'</Filter>
      <MaxScaleDenominator>500000</MaxScaleDenominator>
      <MinScaleDenominator>200000</MinScaleDenominator>
      <TextSymbolizer name="ref" face_name="DejaVu Sans Book" size="9" fill="#6666ff" halo_radius="1" wrap_width="12" min_distance="20"/>
    </Rule>
    <Rule>
      <Filter>[highway] = 'motorway_junction'</Filter>
      <MaxScaleDenominator>200000</MaxScaleDenominator>
      <MinScaleDenominator>20000</MinScaleDenominator>
      <TextSymbolizer name="ref" face_name="DejaVu Sans Book" size="9" fill="#6666ff" halo_radius="1" wrap_width="12" min_distance="20"/>
      <TextSymbolizer name="name" face_name="DejaVu Sans Book" size="8" fill="#6666ff" halo_radius="1" wrap_width="12" dy="-8" min_distance="20"/>
    </Rule>
    <Rule>
      <Filter>[highway] = 'motorway_junction'</Filter>
      <MaxScaleDenominator>20000</MaxScaleDenominator>
      <TextSymbolizer name="ref" face_name="DejaVu Sans Book" size="13" fill="#6666ff" halo_radius="1" wrap_width="12" min_distance="20"/>
      <TextSymbolizer name="name" face_name="DejaVu Sans Book" size="14" fill="#6666ff" halo_radius="1" wrap_width="12" dy="-14" min_distance="20"/>
    </Rule>

This will make sure ref and name are always separated

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Author: steve8[at]mdx.ac.uk
[Added to the original trac issue at 7.49pm, Sunday, 6th April 2008]

Skywave's patch above implemented "as is". Original request for black dot was not ever implemented as it clouded rather than calarified.

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