A method of providing a location estimate for a mobile station in a wireless communications network. Metadata for a facts metadata object and one or more dimension metadata objects that are associated with the facts metadata object is stored. This placement of EBM data in a separate erase block location from the user data slows the Flash memory operation by requiring up to two writes andor block erasures for every update of the user data. A pen-based drawing method and system allows users to create and edit three dimensional objects by sketching. The linking is done through the classes field within the first data cell which contains the identifier of the second data cell. Various aspects may generate a restored sampled signal by adding samples to the cropped sampled signal read from memory.