00:09feature lines are 3d objects that are fundamental to surface design and grading for site projects
00:15use them to create grading footprints surface break lines and corridor baselines feature lines
00:22are like polylines but with enhanced operations there are multiple ways to create feature lines
00:30with civil 3d open in the ribbon home tab create design panel expand the feature line drop down
00:39to access these options select create feature line to draw straight and curved feature lines
00:45directly in the drawing you can also choose to create feature lines from objects from an alignment
00:51from a corridor or from a stepped offset when you select a feature line in your drawing the feature
00:58line contextual ribbon displays with these tools you can modify feature lines edit geometry edit
01:06elevations analyze and more feature lines can interact with one another you can choose to
01:14keep them in the same site to enable interaction or in different sites to prevent interaction
01:20in the tool space on the prospector tab select none for siteless feature lines or expand sites to store
01:29feature lines on different sites for example when you want to show existing feature lines on one site
01:35and proposed feature lines on another when two feature lines overlap in the same site you can easily view
01:42their interaction in this case two feature lines are created on the fl1 site the basic style feature
01:50line is set to an elevation of 500 feet and the other is set to 750 feet to view the
01:57interaction in a
01:583d viewer select both lines then right click one of the lines and select object viewer in the object viewer
02:07expand the view drop down and select se isometric notice that where the two feature lines cross the
02:14elevation of the 500 foot line adjusts to 750 feet to view what happens when feature lines are saved to
02:22different sites right click one of the feature lines and select move to site in the move to site dialog
02:29select
02:30create new in the site properties dialog in the name field type fl2 click ok twice now this feature line
02:42is stored on site fl2 open the se isometric view again to see that the two feature lines no longer
02:49interact
02:52to understand how feature line interactions are prioritized first move the feature line back to
02:58the fl1 site next right click the 750 foot feature line and select feature line properties
03:08in the feature line properties dialog box expand the style drop down and select ditch then click ok
03:16now the lines are two different styles the priority of which is determined by a hierarchy
03:22to view the feature line hierarchy in the prospector under sites expand the site you are working in here it
03:30is fl1
03:32then right click feature lines and select properties the feature line site properties dialog box opens to
03:40the options tab you can select a line type and use the arrows to move it up or down in
03:46a list
03:47in this case select standard and then click the up arrow to move it above ditch click ok now switch
03:56to
03:56the se isometric view and notice that instead of the 500 foot line adjusting up to 750 feet
04:02the 750 foot line adjusts down to 500 feet where the two lines cross feature lines are essential components
04:11of site design understanding how feature lines are created and how they interact will result in a
04:17so
