private static GtfsSchemaCreationImpl ommitShapeColumn(GtfsSchemaCreationImpl beforeSchema){
		GtfsSchemaCreationImpl afterSchema = new GtfsSchemaCreationImpl(beforeSchema);
		ArrayList<Integer> afterTypes = new ArrayList<Integer>();
		afterTypes.addAll(afterSchema.getTypes());
		
		for(int i=0; i<afterTypes.size(); i++){
			if(afterTypes.get(i) == SeColumnDefinition.TYPE_SHAPE)
				afterSchema.deleteColumn(i);
		}
		return afterSchema;
	}