Hi All,
I am using MXRoad SS2.
I was trying to change null levels of few points in a string to zero level.
By using minor option 021/022 I was able to do that, but I can do that for single point at a time.
How to change ALL null levels in a string to zero level on one go. The string is having points with other level also, which I dont want disturb.
Thanks in advance.
Regards
Anil
Use op DESIGN to change all levels in an existing string to any level
example
design model = my model
string = xxxxx
desi,my model
120,xxxx,,xxxx,0,7=0
999
field 4, sets the datum level and fiel 7 the offset to the datum level. so in this example all points on string xxxx are on level zero ( 0 )
regards
Per Justsen
Danish Road Directorate
Hi Per Justsen,
Your example updates all the point levels to zero. But my requirement is only points with null levels in the string need to be set to zero and other points in the string with non-null levels should not updated.
Hi Sir
I am new to Mx-Roads v8i, SS2,can any one tell me what is the meaning of null levels and how to rectify it .
A null level is a special value that MX knows to ignore when creating triangulations, cross sections etc. Say you created a triangulation from a string with four points, and two of the points had null levels (dimension 3 = -999.000). Only two of the points would be included in a triangulation - the two points with the null levels would be ignored.
So null levels are not "wrong" - and they can be very useful. For example, let's say you surveyed the route of a fence which crossed a ditch - if there was a point on the fence string where it crossed the ditch it should have a null level so that it does not distort the triangulation.
thank you sir, then how to correct the null levels using mx......
Wouldn't exporting the strings to AutoCAD 3D polylines convert all -999s to 0.000 but leave actual levels unaltered? Then you could import the string back again...
S
ok thank u, sir......