Determining elevation values in a geocoding system

摘要

A system and method of determining elevation values includes inputting a location (30) into a geocoding system having a segment data set and determining the closest segment (33) in the data set to the location (30). A data set of elevation data the closest segment is accessed and a determination is made of an elevation value for each of two elevation points (35,36) associated with the closest segment (32). The elevation value of the location (30) is determined based on interpolation of the location (30) in relation to each the two elevation points (35,36) and the elevation value of each of the two elevation points (35,36). The determined elevation value for said input location (30) is output. The offset distance of the location from the closest segment may be determined and a slope applied to the offset distance to determine an elevation gain or loss for the location due to the offset distance of the location from the closest segment.