Thanks for responding,

I tried changing the geometry object definition, as well as the model
definition and I get the same result...

dream_geom="MULTIPOLYGON((-120.000 43.833,-96.833 43.833,-96.833
26.000,-120.000 26.000,-120.000 43.833))"

class dream4_eta_15km_pm10(Base):
    __tablename__='pm10_dream_rasters'

gid=Column(Integer,Sequence('pm10_dream_rasters_gid_seq'),primary_key=True)
    rundate=Column(DateTime(timezone=True),nullable=False)
    datetime=Column(DateTime(timezone=True),nullable=False)
    location_raw=Column(VARCHAR,nullable=False)
    location_class=Column(VARCHAR,nullable=False)
    timezone=Column(DateTime(timezone=False),nullable=False)
    the_geom=GeometryColumn(MultiPolygon(2),nullable=False)
    max_pm10=Column(Float,nullable=False)
    mean_pm10=Column(Float,nullable=False)

Bill

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