Unless the requirements of this section can be shown without confusion on the situation plan, each application for a building permit for buildings hereafter to be erected along street lines or building lines and within less than five feet of the same shall be accompanied by a plat of the survey of the lot showing the figured length of the lines, the grades and the elevation of the curb and sidewalk along such street lines, and the reference points and dimensions for establishing all the lot lines and building lines. Such street lines and building lines, elevations and reference points shall be checked, verified and certified to by the Building Commissioner, who, when he deems necessary, or when requested by an applicant for a building permit, shall establish the lines and grades upon the ground. (Ord. 3-1935. Passed 4-23-35.)