(This functionality is available with the Volumes module)
Used to enter file details for the new Height Difference database generated by comparing two models,
and to assign feature codes to the points and lines included in this database.
The dialog box is run via the Details & Codes button that is available on the
Create Height Difference Data Base dialog.
Create Height Difference Details dialog box
| Item |
Used to |
| Detail fields: |
Enter the reference details for the new height difference database. |
| Point and Line Codes: |
Group
Select feature codes to be used for the points and lines in the new height difference database.
No Cut / No Fill points and lines are those computed to define the intersection of the 'From'
and 'To' models. Boundary points and lines are those computed at the common boundary of the "From'
and 'To' models. They define the extent of the common area and therefore the boundary of the height
difference model.
Break Line points and lines are those that existed in the 'From' and 'To' models. They are all
added to the height difference model to ensure that it reflects the source models. They also include
new points computed at the intersections of triangles in one source model with break lines in
the other source model.
New Points are those computed at the triangle intersections. They are all added to the height
difference model to ensure that it reflects the source models.
| Notes: |
Points in the source models, which are not part of a break line, are also added to the
height difference database, but retain the feature code of the source model. If there is more
than one point at the same XY location, only the point from the 'From' model is used. |
|
It is possible that points of extremely close proximity may be generated in forming the
height difference model. These points are for all intents and purposes at the same location
(i.e. "duplicate XY" points). As such, the system generally adopts only one of the "duplicate
XY" points for inclusion in the height difference model and the code is chosen based on the
following hierarchy (Boundary, Cut/Fill, Break, 'From' data base code, 'To' data base code,
New Point). It is however still possible for "duplicate XY" points to be present in the new
database, and it is therefore recommended that the new database be
filtered before forming a model. |
|
| OK: |
Close the dialog box and save the changes. |
| Cancel: |
Close the dialog box without saving any changes. |