The Surface Manager toolkit allows the user to modify pre-defined "surfaces", making real-time modifications and updates to contours and associated TIN. Functionality includes swapping TIN lines, adding breaklines to the surface, adding or removing points, adjusting point elevations, removing TIN lines, drawing or removing contour lines and labels, re-contouring at a different interval or with different label settings, etc. Contour lines are automatically updated to reflect any changes made to the TIN. A surface must be named and saved by of one of the contouring routines (in the Triangulate tab) as a prerequisite to using the Surface Manager tools.
Set Current designates a
surface as
current for editing with various surface tool functions, such as
modifying TIN lines, setting a new contour interval, labeling contours,
etc.
Add allows you to add a
Surface by selecting a surface model file (.TIN or .FLT).
Remove allows
you to remove a surface from the list of
stored surfaces.
Rename allows
you to rename a Surface.
Edit allows the user to perform various TIN related modifications to the current surface. Using the Edit function will activate the command line, where the user will be prompted with the following options:
Add Point (AP)
adds a triangulation point to the network by screen picking a point.
The pick must be inside of an existing triangle. The elevation for the
selected point is interpolated from the surrounding TIN network. This
is a good method for adding additional triangulation to the surface
in a sparse area. Also, a new elevation can be specified for the
picked point. This function does not create Carlson points, and
the point will not be saved to the CRD file.
Remove Point (RP)
removes an existing triangulation intersection from the TIN
network. The affected triangulation re-adjusts to compensate for
the missing intersection. Contours update accordingly.
Add
Breakline (AB) adds a breakline to the surface by screen
picking beginning and ending points. The endpoint snap automatically
turns on. Only one breakline can be created at a
time. The TIN network will reconfigure to follow to the new
breakline and update the contours. This does not create 3d
polylines in the drawing.
Swap Edge edges (SW)
swaps common TIN edges to create two different triangles from the
original triangle configuration. Contours automatically update to
reflect changes made to the
TIN. Some common edges may not be swapped because of the
orientation of the two triangles.
Set Elevation (SP)
Sets a new elevation for a specified TIN intersection. The
affected TIN is adjusted and the contours are updated.
Remove Tri (RT)
removes a TIN line from the surface by picking on a TIN line or
selecting an interior point. Contours are removed from the
affected area.
Hide Tris (ST) turns
the TIN network on and off.
Point addition/removal and elevation related changes
related changes made to the TIN are only reflected in
the surface file and the contours resulting from that surface
file. Point changes are not saved to the CRD file and 3d linework
is not updated in the drawing.
Use traditional methods to update these entities if desired.
The command line will prompt as follows:
Add Pnt(AP),Remove Pnt(RP),Add
Breakline(AB),SWap edge(SW),Set elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter keyword: Type in the two
letters of the function to be performed and press enter.
Add Points
Add Pnt(AP),Remove Pnt(RP),Add
Breakline(AB),SWap edge(SW),Set
elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter keyword: Press Enter to
accept the default mode of Adding Points. Pick a point inside the TIN
model at the desires
location. The default elevation will be interpolated from the TIN
model.
Enter the elevation of new point
[559.112171]: 560
The surface will be recalculated using the input data.
Remove Points
Add Pnt(AP),Remove Pnt(RP),Add
Breakline(AB),SWap edge(SW),Set
elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter keyword: RP Pick close to the area that you
want an elevation
point removed.
Add Breakline
Add Pnt(AP),Remove Pnt(RP),Add
Breakline(AB),SWap edge(SW),Set
elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter
keyword: AB
Pick near the 1st point of breakline:
Pick a point
Pick near the 2nd point of breakline:
Pick a point When adding a
breakline, OSNAP Endpoint will default
on.
Swap Triangle
Edge
Add Pnt(AP),Remove Pnt(RP),Add
Breakline(AB),SWap edge(SW),Set
elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter
keyword: SW
Please select an internal edge to swap:
Select desired edge.
Set Point
Elevation
Add Pnt(AP),Remove Pnt(RP),Add
Breakline(AB),SWap edge(SW),Set
elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter
keyword: SP
Pick near the point to have elevation
set: Pick near
point 34.
Enter new elevation of the point
[597.200000]: 600
Remove TRI Line
Add Pnt(AP),Remove Pnt(RP),Add Breakline(AB),SWap edge(SW),Set
elev(SP)
Remove Tri(RT),Show/Hide Tris(ST)
Adding points, Pick point or enter keyword: RT
To conclude the Surface Edit mode, press Enter at
the end
of the internal command sequence. This will return the user
to the Surface Manager dialog.
Properties
allows the user to alter the drawing
display
properties for TIN lines, contours and labels for the selected
surface. Applicable dialogs from Triangulate and Contour are used
to provide a full set of options. When accessed, settings for the
current surface
display configuration
are set. To make a modification, simply specify the desired
change and press ok. For instance, if Draw Triangulation Lines
was checked on, unchecking the box and pressing ok will redraw the
surface without the TIN lines. If the contours were drawn at 1'
intervals, setting the interval value to "2" and pressing Ok will
redraw the contours at 2' intervals. Refer
to the "Triangulate and Contour" section of the manual for detailed
explanation of the
options below.
Done exits the Surface
Manager and saves any modifications performed
to the surface/s updating the .flt or .tin file.
Pulldown Menu Location: Surface > Triangulation Surface
Manager
Keyboard Command: surface_mgr
Prerequisite: A surface