20240916 20152200 1.0 TRUE 1_Elevation Contour The Elevation Contour line feature class is used to store topographic contour lines of equal elevation that are derived from a survey. This feature class can be used in conjunction with the Elevation Point feature class to create a raster or triangulated irregular network (TIN) elevation surface. Sasaki Associates Ltd. Survey, 1990s; Alliance for Public Gardens GIS, Brian Morgan, 2011