Merge pull request #142 from mapzen/remove-unused-road-sort_key-trans…

…form

Remove the unused road_sort_key transform

TileStache/Goodies/VecTiles/transform.py

@@ -280,91 +280,6 @@ def road_classifier(shape, properties, fid, zoom):
     return shape, properties, fid
 
 
-def road_sort_key(shape, properties, fid, zoom):
-    # Note! parse_layer_as_float must be run before this filter.
-
-    floor = 300
-    ceiling = 447
-    sort_val = floor
-
-    highway = properties.get('highway', '')
-    railway = properties.get('railway', '')
-    aeroway = properties.get('aeroway', '')
-    aerialway = properties.get('aerialway', '')
-    service = properties.get('service', '')
-    ne_type = properties.get('type', '')
-
-    is_railway = railway in (
-        'rail', 'tram', 'light_rail', 'narrow_gauge', 'monorail')
-
-    if (highway == 'motorway' or
-            ne_type in ('Major Highway', 'Beltway', 'Bypass')):
-        sort_val += 81
-    elif is_railway:
-        sort_val += 80
-    elif highway == 'trunk' or ne_type == 'Secondary Highway':
-        sort_val += 79
-    elif highway == 'primary' or ne_type == 'Road':
-        sort_val += 78
-    elif highway == 'secondary' or aeroway == 'runway':
-        sort_val += 77
-    elif highway == 'tertiary' or aeroway == 'taxiway' or ne_type == 'Track':
-        sort_val += 76
-    elif highway.endswith('_link'):
-        sort_val += 75
-    elif (highway in ('residential', 'unclassified', 'road', 'living_street')
-          or ne_type == 'Unknown'):
-        sort_val += 60
-    elif highway in ('service'):
-        sort_val += 58
-    elif aerialway in ('gondola', 'cable_car'):
-        sort_val += 92
-    elif aerialway == 'chair_lift':
-        sort_val += 91
-    elif aerialway:
-        sort_val += 90
-    else:
-        sort_val += 55
-
-    if is_railway and service:
-        if service in ('spur', 'siding'):
-            # make sort val more like residential, unclassified which
-            # also come in at zoom 12
-            sort_val -= 19
-        elif service == 'yard':
-            sort_val -= 21
-        else:
-            sort_val -= 23
-
-    if highway == 'service' and service:
-        # sort alley, driveway, etc... under service
-        sort_val -= 2
-
-    if zoom >= 15:
-        bridge = properties.get('bridge')
-        tunnel = properties.get('tunnel')
-        if bridge in ('yes', 'true') or aerialway:
-            sort_val += 50
-        elif (tunnel in ('yes', 'true') or
-              (railway == 'subway' and tunnel not in ('no', 'false'))):
-            sort_val -= 50
-
-        # Explicit layer is clipped to [-5, 5] range. Note that
-        # the layer, if present, will be a Float due to the
-        # parse_layer_as_float filter.
-        layer = properties.get('layer')
-        if layer is not None:
-            layer = max(min(layer, 5), -5)
-            if layer > 0:
-                sort_val = int(layer + ceiling - 5)
-            elif layer < 0:
-                sort_val = int(layer + floor + 5)
-
-    properties['sort_key'] = sort_val
-
-    return shape, properties, fid
-
-
 def road_trim_properties(shape, properties, fid, zoom):
     properties = _remove_properties(properties, 'bridge', 'tunnel')
     return shape, properties, fid