generate_roads.py

#!/usr/bin/env python
import yaml

CYCLEWAYS_OUTLINES = [
    'lane',
    'opposite_lane',
    'track',
    'opposite_track',
    'share_busway',
    'opposite_share_busway',
]
SIDES = ['left', 'right']


def get_width_variable(zoom, highway):
    return '@rdz%s_%s' % (zoom, highway)


def get_outline_variable(zoom, highway):
    return '@rdz%s_%s_outline' % (zoom, highway)


with open('roads.yaml', 'r') as fh:
    params = yaml.load(fh).get('params', [])

out = []

for zoom_data in params:
    zoom = zoom_data['zoom']

    # Generate width variables
    out.append('/* Z%s widths */' % zoom)
    for highway, width in zoom_data['widths'].items():
        out.append('%s: %s;' % (get_width_variable(zoom, highway), width))
    out.append('/* Z%s outlines */' % zoom)
    # Generate outlines variables
    for highway, outline in zoom_data['outlines'].items():
        out.append('%s: %s;' % (get_outline_variable(zoom, highway), outline))
    out.append('')
out.append('')

# Generate outline code
# Line to draw both borders (left and right)
out.append(
    "#roads_high::outline[zoom>=11],\n"
    "#tunnel::outline[zoom>=11],\n"
    "#bridge::outline[zoom>=11] {"
)
out.append("""
  line-cap: round;
  line-join: round;

  line-color: @standard-case;
  [type='motorway'],
  [type='motorway_link'] {
    line-color: @motorway-case;
  }
  [type='trunk'],
  [type='trunk_link'] {
    line-color: @trunk-case;
  }
  [type='primary'],
  [type='primary_link'] {
    line-color: @primary-case;
  }
  [type='secondary'],
  [type='secondary_link'] {
    line-color: @secondary-case;
  }
  [cycleway='lane'],
  [cycleway='opposite_lane'] {
    line-color: @cycle_lane_case;
    line-dasharray: 6,3;
    line-cap: butt;
  }
  [cycleway='track'],
  [cycleway='opposite_track'] {
    line-color: @cycle_track_case;
    line-cap: butt;
  }
  [cycleway='share_busway'],
  [cycleway='opposite_share_busway'] {
    line-color: @cycle_busway_case;
    line-dasharray: 6,10;
    line-cap: butt;
  }
  [type='steps']{
    line-color: @steps-case;
    [ramp_cycle='yes'],[ramp_wheelchair='yes'],[ramp_stroller='yes']{
      line-color: fadeout(@cycle_lane_case, 50%);
    }
  }
  [type='railway'] {
    line-color: fadeout(@land,50%);
  }
""")
for zoom_data in params:
    zoom = zoom_data['zoom']
    out.append('  [zoom=%s] {' % zoom)
    for highway, width in zoom_data['widths'].items():
        width_variable = get_width_variable(zoom, highway)
        outline_variable = get_outline_variable(zoom, highway)
        out.append("    [type='%s'] {" % highway)
        out.append("      line-width: %s + (2 * %s);" % (width_variable,
                                                         outline_variable))
        out.append('    }')
    out.append('  }')
out.append('}')
# Bridge and tunnel specific outline
out.append('''
bridge::outline[zoom>=11] {
  line-cap: butt;
  line-color: @standard-case * 0.8;

  [type='motorway'],
  [type='motorway_link'] {
    line-color: @motorway-case * 0.8;
  }
  [type='trunk'],
  [type='trunk_link'] {
    line-color: @trunk-case * 0.8;
  }
  [type='primary'],
  [type='primary_link'] {
    line-color: @primary-case * 0.8;
  }
  [type='secondary'],
  [type='secondary_link'] {
    line-color: @secondary-case * 0.8;
  }
  [type='railway'] {
    line-color: @secondary-case * 0.8;
  }
}

#tunnel::outline[zoom>=11] {
  line-cap: butt;
  line-dasharray: 3,3;
}
''')

for side in ['left', 'right']:
    # Generate reset left/right outline
    # This eventually overload one side border for cycleways. First, hide the
    # casing on this side, then show cycleway.
    for cycleway in CYCLEWAYS_OUTLINES:
        out.append(
            "#roads_high::reset_outline_%s[zoom>=11][cycleway_%s='%s'],"
            % (side, side, cycleway)
        )
        out.append(
            "#tunnel::reset_outline_%s[zoom>=11][cycleway_%s='%s'],"
            % (side, side, cycleway)
        )
        out.append(
            "#bridge::reset_outline_%s[zoom>=11][cycleway_%s='%s'],"
            % (side, side, cycleway)
        )
    out.append('''{
  /* -- colors & styles -- */
  line-color: @standard-fill;
  [type='motorway'],
  [type='motorway_link'] {
    line-color: @motorway-fill;
  }
  [type='trunk'],
  [type='trunk_link'] {
    line-color: @trunk-fill;
  }
  [type='primary'],
  [type='primary_link'] {
    line-color: @primary-fill;
  }
  [type='secondary'],
  [type='secondary_link'] {
    line-color: @secondary-fill;
  }
  [type='path'],
  [type='pedestrian'],
  [type='bridleway'],
  [type='footway'] {
    line-color: @pedestrian-fill;
  }
  [type='cycleway'],
  [type='path'][bicycle='yes'],
  [type='path'][bicycle='designated'],
  [type='footway'][bicycle='yes'],
  [type='footway'][bicycle='designated'],
  [type='bridleway'][bicycle='yes'],
  [type='bridleway'][bicycle='designated'],
  [type='pedestrian'][bicycle='yes'],
  [type='pedestrian'][bicycle='designated'] {
    line-color: @cycle-fill;
  }
  [type='steps'] {
    line-color: @steps-fill;
  }
''')
    for zoom_data in params:
        zoom = zoom_data['zoom']
        out.append('  [zoom=%s] {' % zoom)
        for highway, width in zoom_data['widths'].items():
            width_variable = get_width_variable(zoom, highway)
            outline_variable = get_outline_variable(zoom, highway)
            out.append("    [type='%s'] {" % highway)
            out.append("      line-width: %s + %s;" % (width_variable,
                                                       outline_variable))
            out.append("      line-offset: %s;" % outline_variable)
            out.append('    }')
        out.append('  }')
    out.append('}')
    out.append('')
    for cycleway in CYCLEWAYS_OUTLINES:
        out.append(
            "#tunnel::reset_outline_%s[zoom>=11][cycleway_right='%s']"
            % (side, cycleway)
        )
    out.append('''{
  [type='motorway'],
  [type='motorway_link'] {
    line-color: lighten(@motorway-fill, 10%);
  }
  [type='trunk'],
  [type='trunk_link'] {
    line-color: lighten(@trunk-fill, 10%);
  }
  [type='primary'],
  [type='primary_link'] {
    line-color: lighten(@primary-fill, 10%);
  }
  [type='secondary'],
  [type='secondary_link'] {
    line-color: lighten(@secondary-fill, 10%);
  }
}''')
    out.append('')

    # Generate left/right outline
    for cycleway in CYCLEWAYS_OUTLINES:
        out.append(
            "#roads_high::outline_%s[zoom>=11][cycleway_%s='%s'],"
            % (side, side, cycleway)
        )
        out.append(
            "#tunnel::outline_%s[zoom>=11][cycleway_%s='%s'],"
            % (side, side, cycleway)
        )
        out.append(
            "#bridge::outline_%s[zoom>=11][cycleway_%s='%s'],"
            % (side, side, cycleway)
        )
    out.append('''{
  /* -- colors & styles -- */
  [cycleway_right='lane'],
  [cycleway_right='opposite_lane'] {
    line-color: @cycle_lane_case;
    line-dasharray: 6,3;
    line-cap: butt;
  }
  [cycleway_right='track'],
  [cycleway_right='opposite_track'] {
    line-color: @cycle_track_case;
    line-cap: butt;
  }
  [cycleway_right='share_busway'],
  [cycleway_right='opposite_share_busway'] {
    line-color: @cycle_busway_case;
    line-dasharray: 6,10;
    line-cap: butt;
  }''')
    for zoom_data in params:
        zoom = zoom_data['zoom']
        out.append('  [zoom=%s] {' % zoom)
        for highway, width in zoom_data['widths'].items():
            width_variable = get_width_variable(zoom, highway)
            outline_variable = get_outline_variable(zoom, highway)
            out.append("    [type='%s'] {" % highway)
            out.append("      line-width: %s + %s;" % (width_variable,
                                                       outline_variable))
            out.append("      line-offset: %s;" % outline_variable)
            out.append('    }')
        out.append('  }')
    out.append('}')
    out.append('')

# Generate inline fill
out.append("#roads_high[zoom>=11],")
out.append("#tunnel::inline[zoom>=11],")
out.append("#bridge::inline[zoom>=11] {")
out.append('''/* -- colors & styles -- */
  line-color: @standard-fill;
  [type='motorway'],
  [type='motorway_link'] {
    line-color: @motorway-fill;
  }
  [type='trunk'],
  [type='trunk_link'] {
    line-color: @trunk-fill;
  }
  [type='primary'],
  [type='primary_link'] {
    line-color: @primary-fill;
  }
  [type='secondary'],
  [type='secondary_link'] {
    line-color: @secondary-fill;
  }
  [type='railway'] {
    line-color: @rail-line;
    line-dasharray: 1,1;
    [type='subway'] { line-opacity: 0.67; }
    [zoom >= 16] { line-dasharray: 1, 2; }
  }
  [type='cycleway'] {
    line-color: @cycle-fill;
  }
  [type='pedestrian'],
  [type='bridleway'],
  [type='footway'],
  [type='path'] {
    line-color: @pedestrian-fill;
  }
  [type='steps'] {
    line-color: @steps-fill;
  }
  [type='service'],
  [type='track'],
  [type='tertiary'],
  [type='living_street'],
  [type='road'],
  [type='unclassified'],
  [type='residential'],
  [type='tertiary_link'],
  [type='secondary_link'],
  [type='primary_link'],
  [type='trunk_link'],
  [type='motorway_link'],
  [type='primary'],
  [type='secondary'],
  [type='motorway'],
  [type='trunk'] {
    line-cap: round;
    line-join: round;
  }
  [type='cycleway'],
  [type='pedestrian'],
  [type='bridleway'],
  [type='footway'],
  [type='path'] {
    line-join: round;
  }
''')
for zoom_data in params:
    zoom = zoom_data['zoom']
    out.append('  [zoom=%s] {' % zoom)
    for highway, width in zoom_data['widths'].items():
        width_variable = get_width_variable(zoom, highway)
        out.append("    [type='%s'] {" % highway)
        out.append("      line-width: %s;" % (width_variable))
        out.append('    }')
    out.append('  }')
out.append('}')
# Tunnel-specific overload
out.append('''#tunnel::inline[zoom>=11] {
  line-cap: butt;

  [type='motorway'],
  [type='motorway_link'] {
    line-color: lighten(@motorway-fill, 10%);
  }
  [type='trunk'],
  [type='trunk_link'] {
    line-color: lighten(@trunk-fill, 10%);
  }
  [type='primary'],
  [type='primary_link'] {
    line-color: lighten(@primary-fill, 10%);
  }
  [type='secondary'],
  [type='secondary_link'] {
    line-color: lighten(@secondary-fill, 10%);
  }
}
''')

print('\n'.join(out))

gistfile1.txt

# Road width variables that are used in road & bridge styles.
#
# Roads are drawn in two steps. First, a line if the width of the road + the
# two borders is drawn and then a line of the width of the road is drawn on
# top, to make a road with borders. Here, the width of the ways is the width
# of the fill of the road and the border width is the width of a single
# border, on one side (first line is drawn with a width of way with + 2 *
# border_width).
params:
  - zoom: 11
  widths:
    motorway: 1.6
    trunk: 1.6
    primary: 0.8
    secondary: 0.8
    motorway_link: 0
    trunk_link: 0
    primary_link: 0
    secondary_link: 0
    tertiary: 0
    tertiary_link: 0
    residential: 0
    unclassified: 0
    road: 0
    living_street: 0
    service: 0
    track: 0
    pedestrian: 0
    bridleway: 0
    path: 0
    footway: 0
    steps: '@rdz11_pedestrian'
    cycle: 0.5
    railway: 0.2
    outlines:
      primary: 0.8
      secondary: 0.8
      motorway_link: 0.15
      trunk_link: 0.15
      primary_link: 0.15
      secondary_link: 0.15
      tertiary: 0.15
      tertiary_link: 0.15
      residential: 0.15
      unclassified: 0.15
      road: 0.15
      living_street: 0.15
      service: 0
      track: 0
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 0
      cycle: 0
      railway: 0
  - zoom: 12
    widths:
      motorway: 2.5
      trunk: 2.5
      primary: 1.2
      secondary: 1.2
      motorway_link: 0.5
      trunk_link: 0.5
      primary_link: 0.5
      secondary_link: 0.5
      tertiary: 0.5
      tertiary_link: 0.5
      residential: 0.5
      unclassified: 0.5
      road: 0.5
      living_street: 0.5
      service: 0
      track: 0
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: pedestrian
      cycle: 1
      railway: 0.4
    outlines:
      motorway: 1
      trunk: 1
      primary: 1
      secondary: 1
      motorway_link: 0.25
      trunk_link: 0.25
      primary_link: 0.25
      secondary_link: 0.25
      tertiary: 0.25
      tertiary_link: 0.25
      residential: 0.25
      unclassified: 0.25
      road: 0.25
      living_street: 0.25
      service: 0
      track: 0
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 0
      cycle: 0
      railway: 0
  - zoom: 13
    widths:
      motorway: 3
      trunk: 3
      primary: 1.5
      secondary: 1.5
      motorway_link: 0.6
      trunk_link: 0.6
      primary_link: 0.6
      secondary_link: 0.6
      tertiary: 1
      tertiary_link: 0.6
      residential: 0.6
      unclassified: 0.6
      road: 0.6
      living_street: 0.6
      service: 0.3
      track: 0.2
      pedestrian: 0.20
      bridleway: 0.20
      path: 0.20
      footway: 0.20
      steps: '@rdz13_pedestrian'
      cycle: 1
      railway: 0.8
    outlines:
      motorway: 1
      trunk: 1
      primary: 1
      secondary: 1
      motorway_link: 0.6
      trunk_link: 0.6
      primary_link: 0.6
      secondary_link: 0.6
      tertiary: 0.6
      tertiary_link: 0.6
      residential: 0.6
      unclassified: 0.6
      road: 0.6
      living_street: 0.6
      tertiary: 1
      service: 0
      track: 0
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 0
      cycle: 0
      railway: 0
  - zoom: 14
    widths:
      motorway: 4
      trunk: 4
      primary: 2.8
      secondary: 2.8
      motorway_link: 1
      trunk_link: 1
      primary_link: 1
      secondary_link: 1
      tertiary: 1
      tertiary_link: 1
      residential: 1
      unclassified: 1
      road: 1
      living_street: 1
      service: 0.33
      track: 0.5
      pedestrian: 0.25
      bridleway: 0.25
      path: 0.25
      footway: 0.25
      steps: '@rdz14_pedestrian'
      cycle: 2
      railway: 1.0
    outlines:
      motorway: 1
      trunk: 1
      primary: 1
      secondary: 1
      motorway_link: 1
      trunk_link: 1
      primary_link: 1
      secondary_link: 1
      tertiary: 1
      tertiary_link: 1
      residential: 1
      unclassified: 1
      road: 1
      living_street: 1
      service: 0
      track: 0
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 0
      cycle: 0
      railway: 0
  - zoom: 15
    widths:
      motorway: 6
      trunk: 6
      primary: 4
      secondary: 4
      motorway_link: 1.5
      trunk_link: 1.5
      primary_link: 1.5
      secondary_link: 1.5
      tertiary: 1.5
      tertiary_link: 1.5
      residential: 1.5
      unclassified: 1.5
      road: 1.5
      living_street: 1.5
      service: 0.5
      track: 0.5
      pedestrian: 0.5
      bridleway: 0.5
      path: 0.5
      footway: 0.5
      steps: '@rdz15_pedestrian'
      cycle: 2
      railway: 1.5
    outlines:
      motorway: 1.25
      trunk: 1.25
      primary: 1
      secondary: 1
      motorway_link: 1
      trunk_link: 1
      primary_link: 1
      secondary_link: 1
      tertiary: 1
      tertiary_link: 1
      residential: 1
      unclassified: 1
      road: 1
      living_street: 1
      service: 1
      track: 1
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 1
      cycle: 0
      railway: 1
  - zoom: 16
    widths:
      motorway: 10
      trunk: 10
      primary: 8
      secondary: 8
      motorway_link: 4
      trunk_link: 4
      primary_link: 4
      secondary_link: 4
      tertiary: 4
      tertiary_link: 4
      residential: 4
      unclassified: 4
      road: 4
      living_street: 4
      service: 1.33
      track: 1.33
      pedestrian: 0.75
      bridleway: 0.75
      path: 0.75
      footway: 0.75
      steps: '@rdz16_pedestrian'
      cycle: 2
      railway: 2
    outlines:
      motorway: 1.25
      trunk: 1.25
      primary: 1.25
      secondary: 1.25
      motorway_link: 1
      trunk_link: 1
      primary_link: 1
      secondary_link: 1
      tertiary: 1
      tertiary_link: 1
      residential: 1
      unclassified: 1
      road: 1
      living_street: 1
      service: 1
      track: 1
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 1
      cycle: 0
      railway: 1
  - zoom: 17
    widths:
      motorway: 17
      trunk: 17
      primary: 15
      secondary: 15
      motorway_link: 10
      trunk_link: 10
      primary_link: 10
      secondary_link: 10
      tertiary: 10
      tertiary_link: 10
      residential: 10
      unclassified: 10
      road: 10
      living_street: 10
      service: 3.3
      track: 3.3
      pedestrian: 1
      bridleway: 1
      path: 1
      footway: 1
      steps: '@rdz17_pedestrian'
      cycle: 3
      railway: 3
    outlines:
      motorway: 1.5
      trunk: 1.5
      primary: 1.25
      secondary: 1.25
      motorway_link: 1
      trunk_link: 1
      primary_link: 1
      secondary_link: 1
      tertiary: 1
      tertiary_link: 1
      residential: 1
      unclassified: 1
      road: 1
      living_street: 1
      service: 1
      track: 1
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 1
      cycle: 0
      railway: 2
  - zoom: 18
    widths:
      motorway: 23
      trunk: 23
      primary: 20
      secondary: 20
      motorway_link: 14
      trunk_link: 14
      primary_link: 14
      secondary_link: 14
      tertiary: 14
      tertiary_link: 14
      residential: 14
      unclassified: 14
      road: 14
      living_street: 14
      service: 7
      track: 7
      pedestrian: 1.5
      bridleway: 1.5
      path: 1.5
      footway: 1.5
      steps: 2
      cycle: 4
      railway: 4
    outlines:
      motorway: 2
      trunk: 2
      primary: 2
      secondary: 2
      motorway_link: 1.75
      trunk_link: 1.75
      primary_link: 1.75
      secondary_link: 1.75
      tertiary: 1.75
      tertiary_link: 1.75
      residential: 1.75
      unclassified: 1.75
      road: 1.75
      living_street: 1.75
      service: 1.75
      track: 1.75
      pedestrian: 0
      bridleway: 0
      path: 0
      footway: 0
      steps: 1
      cycle: 0
      railway: 3