A generic term for: Tank, conveyor, permanent crane, gas or oil well, smokestack/chimney, fire lookout tower, tower, microwave tower, pile. Polygons replace symbol. TRIM-EBM is a 2D product containing TRIM 1 features excluding toponoymy, contours and DEM for which area based features have been closed to form polygons, symbol points have been replaced with polygons and vertical integration of streams has been removed.