A touch system comprises a touch surface and at least one camera acquiring images of the touch surface. Height values for roads at junctions can be obtained from optimizing a cost function or as input. An upper portion is movable to any of a plurality of positions. The two windings are directly connected to the AC to DC converter to obtain the high voltage DC power. The system includes a program to automatically assign an account number to a pet shop or store and an identification number for the dog. The nitrogen gas produced by the solid propellant gas generation is optionally treated to remove undesirable elements such as water andor carbon dioxide from the product gas prior to the delivery of the product gas to the protected hazard area.