20230516 11313200 1.0 TRUE Sewer Manhole Manhole data is collected using GPS. Elevation data is accurate only to the accuracy of the sub-meter GPS equipment, which is plus or minus ten feet. Elevations noted in the Comment field as being from a survey company would be accurate to the elevation noted.Data in the Layer field that ends in NV denotes a manhole that has not been found (Not Verified) but is believed to be in the vicinity. GP denotes the data was GPS'd, OR means it was digitized from aerial photography.