The apply elevations to selected features tool adds per vertex elevation values to vector features based on either loaded terrain data, or an existing elevation attribute.
Select one or more vector feature with the digitizer tool and right-click anywhere on the map to the Apply Elevations to Selected Features option that is located in the Analysis/Measurement sub-menu. To use this tool, there must be gridded elevation data loaded and / or elevation attributes assigned to the vector features.
Terrain Layers — Selecting this option will add an ELEVATION attribute to each selected
point feature containing the elevation value at each point location from
the top-most terrain layer at that location.
Any selected line or area features that have a valid elevation from loaded terrain at each vertex location will have a set of per-vertex elevations added to the feature containing the elevation at each vertex from the loaded terrain layers.
Default Elevation Attribute — The elevation attribute assigned to the entire feature will be applied as a per vertex elevation attribute.
Specify how to resolve conflict if elevation values already exist for the feature.
Replace it with the New Elevation Value — Any existing elevation values will be overridden by the value from the above source.
Add the New Elevation Value to the Existing Value —The value coming from the source specified above will be added to any existing elevation values. For example, if the vectors have an elevation value that has a number representing a height value of the object, and then the elevations are added from the loaded terrain layers, the resulting per vertex elevation values will represent absolute elevation for the vector feature.
Only update the elevations for selected line/area vertices in features that already have an elevation value—
Append a unit label (e.g. 'ft' or 'm') to each elevation attribute (point features only) — With this option selected the elevation attribute will contain a unit, and not just the number. Point features have the elevation attribute updated; but unit labels can not be stored in per-vertex elevations, so this does not apply to area and line features.