How to use the routemap.common.symbols function in routemap

The actualy rendering information is computed seperately. This allows to use
    different rendering styles on the same table. For the moment there is only
    style_default.py.
"""

import os.path
import shapely.ops as sops

from osgende import RelationHierarchy,RelationSegments,RelationSegmentRoutes
from osgende.common.postgisconn import PGTable
import conf
import routemap.common.symbols as symbols

symboltypes = (
    symbols.ColorBoxReference,
    symbols.SymbolReference,
)


class Routes(RelationSegmentRoutes):
    """Preprocessed information about the cycling routes.

       It contains the following fields:

       * 'name' - the default name, generally taken from name-tag
          however, if the name is entirely in non-latin symbols,
          name:en is prefered if existing
       * 'intname' - collection of translated names
       * 'symbol' - unique name of the computed shield to use
       * 'country' - coutry the route is mainly in (in terms of
                     numbers of sections, TODO check this heuristic)

"""

import os.path
from collections import defaultdict

import osgende
import conf
import routemap.common.symbols as symbols
import shapely.ops as sops

symboltypes = (
            symbols.ShieldReference,
            symbols.SwissMobileReference,
            symbols.JelReference,
            symbols.KCTReference,
            symbols.OSMCSymbolReference,
            symbols.SymbolReference
        )


class Routes(osgende.RelationSegmentRoutes):
    """Preprocessed information about the hiking routes.

       It contains the following fields:

       * 'name' - the default name, generally taken from name-tag
          however, if the name is entirely in non-latin symbols,
          name:en is prefered if existing
       * 'intname' - collection of translated names
       * 'symbol' - unique name of the computed shield to use
       * 'country' - coutry the route is mainly in (in terms of
                     numbers of sections, TODO check this heuristic)