You can edit and add data to a surface after you create it.
Surface data categories include:
- Boundaries. Polygons that define outer, hide, and show surface boundary types.
- Breaklines. Includes standard, proximity, non-destructive, and wall breaklines. You can define breaklines from objects in the drawing or import them from a file.
- Contours. Includes contour data that you can define from polyline objects.
- DEM files. Includes USGS Digital Elevation Model DEM files. Note: To use SDTS files, first convert them into DEM files.
- Drawing objects. Includes Line, Point, Block, Text, 3D Faces, and Polyfaces. Used for creating surface points from AutoCAD entities.
- Point files. Includes ASCII point files.
- Point groups. Includes previously defined point groups.
- Point survey queries. Dynamic references to the points that are included in survey queries.
- Figure survey queries. Dynamic references to the figures that are included in survey queries.
