line
The default lineElevationGroundScale for all annotations added to this annotation manager if not overwritten by individual annotation settings.
Controls how much the elevation of lines with line-elevation-reference set to sea scales with terrain exaggeration. A value of 0 keeps the line at a fixed altitude above sea level. A value of 1 scales the elevation proportionally with terrain exaggeration. Default value: 0. Value range: 0, 1