This option is used to edit the Tin that has been created in the 12d Model project.
The video below will show how use the Edit Tin panel.
Continue down the page to see the Edit Tin Panel options.
To open the “Edit Tin” panel, use the TfNSW Survey Standards Toolbar:
Hold the third button down (the Survey Triangulate Toolbar) and select the 3rd drop down command – Edit Tin.
The Edit Tin panel will be opened.
When a TIN has been created, it can be edited at any time by utilitising the Edit TIN panel, all the options from when the Tin was created are available here.
If you have just finished creating a new TIN 12d Model automatically changes the Create Tin Panel to the Edit TIN Panel ready for editing the TIN.
General Tab
Select the TIN to edit from the drop down list.
The Tin Colour set here is the ‘base tin colour’, it is possible to change the colour of individual triangles in a post process.
The Tin Style is the linestyle used for drawing sections through the tin on the section view.
If you would like to learn about the additional tin settings, please refer to the Create Tin Post. Visit: Create Tin
Data Tab
The Data Tab has the TIN data displayed as a Model List.
The Models can be added or removed from the list, and the TIN updated when it is retriangulated.
Data Polygon allows a polygon string to be selected and only string points that are inside the polygon are used in the triangulation. All data outside the polygon is not included in the triangulation.
zmin /zmax display the minimum and maximum z values for the selected data set, allowing a quick look to check that the data selected is correct, ie no Null values.
Nulling Tab
If Nulling has been used, then the values will be shown here. The values can be modified and updated by retriangulating the TIN.
Here are the details for the Nulling options:
- Angle
If a triangle has an external side (that is not a breakline) with an angle on it less than the specified angle, then the triangle is nulled. - Length
If a triangle has an external side (that is not a breakline) greater than the specified length, then the triangle is nulled. - Combined Angle
For the combined case, a triangle will be nulled if it has an external side which is not a breakline and the sum of the two angles on it is less than the Combined Angle. - Combined Length
For the combined case, a triangle will be nulled if it has an external side which is not a breakline and whose length is greater than the Combined Length.
If any of these options are left blank then the triangles will not be nulled by this test.
Null Polygon option allows a polygon string to be selected and any triangle whose centroid is outside the null polygon will be automatically nulled.
