Abstract: The storage space required for representing geographic features is reduced by determining an optimum number of bits that can be used to store coordinate data along each separate axis. Any coordinate change that cannot directly fit within the optimum bit size is subjected to an escape sequence made up of one or more special values and a normal value that fits in the optimum bit size. The special values are obtained by a predetermined calculation for each bit size. If all changes for one axis are in the same direction and special values are not needed, a global sign can be used to further enhance use of the available space on the storage medium.

Abstract: An assembly of disposable biodegradable containers has smaller containers of the assembly telescopingly housed within next larger containers of the assembly where each container includes a body and a closeable reopenable closure at an end of the body including a cap joined to the body where the cap extends longitudinally from the body to an aperture, where the cap includes a pair of longitudinally extending opposite V-shaped flexible folding hinge portions whereby when the longitudinally extending exterior surfaces of the cap which are subtended by the V-shaped hinge portions are urged towards one another, interior surfaces of the cap bounded by edges of aperture contact thereby closing the aperture and including a contact adhesive for releasably maintaining the cap closed by securing contacting interior surfaces of the cap and including a deformable strip for retaining the container closed upon wrapping strip end portions about the cap has been folded about the strip.