def __init__(self, guard, uid):
        components.Componentized.__init__(self)
        self.guard = guard
        self.uid = uid
        self.expireCallbacks = []
        self.checkExpiredID = None
        self.setLifetime(60)
        self.portals = {}
        self.touch()

    # New Guard Interfaces
Converts lat/lon to pixel coordinates in given zoom of the EPSG:4326 pyramid
dataset/ETHPy150Open twisted/nevow/nevow/guard.py/GuardSession.__init__--crossover with--dataset/ETHPy150Open Ecotrust/create-utfgrids/globalmaptiles.py/GlobalGeodetic.LatLonToPixels