An elevation is different. It shows the face of something, or perhaps more correct, the projection of an object/s to a plane. But my testing suggests it produces SECTIONS, not elevations.
Yes, you can use abbreviations in tables and figures. All abbreviations used in tables and figures should be defined in the table note or figure caption, respectively, even though the abbreviations will be also be defined in the text if they are used there.
abbreviation - a shortened form of a word or phrase. 1  descriptor, form, signifier, word form - the phonological or orthographic sound or appearance of a word that can be used to describe or identify something; the inflected forms of a word can be represented by a stem and a list of inflections to be attached.