How do I add contour properties to a fitting composite line? 40

Are you sure your fit was successful? After the polyline is converted into a two-dimensional polyline, there will definitely be a fitting smoothing term.

Click on the curve, the grip appears, hover the mouse over the grip and select Delete Fit Point on the pop-up submenu.

Open the Ctrl+1 property window, click the polyline, and push the triangle to the right of the vertex in the window to get the number of the most unpointed point, that is, the number of nodes.

1. Delete redundant nodes, 2012 version can place the mouse on the redundant nodes, right-click, and click Delete.

When the contour interpolation command is executed, you need to enter the "filter parameter after interpolation", the larger the input value, the smoother the interpolated contour line will be (but it is recommended to enter a value of 1, otherwise the interpolated contour line will not reflect the terrain correctly).

It is not advisable to draw a sleek contour line with less points, and the outer page measurement is very hard, just so that the drawing can accurately reflect the landform, why delete the dots? If the computer is very stuck during the drawing process, it is recommended to change to another computer with a higher configuration.

Use dotted rounding Do not use the S and F contours that come with CASS.

1. Drawing processing - elevation point - field point number.

2. Contour line - Establish DTM - River triangle network for deletion - Draw contour lines.

3. Repair contour lines.

Advantages and disadvantages of the four contour fitting methods in Cass7:

1) Non-fitting (polyline): The amount of contour data generated is small, the generation speed is the fastest, and the drawn contour line is an unsmooth polyline, which is used to observe the contour effect after modifying the triangulation network.

2) Tension spline fitting: The generated contour data is larger, and the speed is slightly slower than that of the non-fitting method, but the drawn contour line is finally the actual terrain and is more beautiful than the polyline.

3) Cubic B-spline fitting: The resulting contour lines are the smoothest and the most aesthetically pleasing, but there will be a little distortion, resulting in some contour lines not passing through the elevation points.

4) Spline fitting: its advantage is that it is still a spline even after being disconnected, and it can be modified subsequently, but the disadvantage is that it is easy to cross lines.

In general, when drawing contour lines over a large area, it is best to use a non-fitting method to observe the effect of contour lines in the process of modifying the triangulation, and when the final contour lines are no longer triangulated, a cubic B-spline fitting is used.

1. Click the "View Encoding" tool on the left sidebar to confirm whether the contour line is encoded, and the encoding can be recognized by the system before it can be exported to the unencoded contour line3, and the contour line export DAT function can be executed.