return null;
}
if ( hasOSM ) {
List<OpenStreetMapProvider> osmProviders = Lists.newArrayList();
for (File osmFile : osmFiles) {
OpenStreetMapProvider osmProvider = new AnyFileBasedOpenStreetMapProviderImpl(osmFile);
osmProviders.add(osmProvider);
}
OpenStreetMapGraphBuilderImpl osmBuilder = new OpenStreetMapGraphBuilderImpl(osmProviders);
DefaultStreetEdgeFactory streetEdgeFactory = new DefaultStreetEdgeFactory();
streetEdgeFactory.useElevationData = params.elevation;