survey input not working??

[land1]

I am trying to create a small site model using polyline contours as base information.

I have followed the instructions to the letter (I think)but have no result.

I have converted the polylinnes to polygons - in the aec pull down selected survey input>2d polys to 3d contours.- set a start elevation and interval (500mm for the small site). Now when the set elevation box comes up no contours are highlighted and the process comes to a halt.

What am I missing - I have successfully created site models before in this manner.

[Pat Stanford]

I think the problem is that there are object on the layer other than the polygons. Try copying the polygons to a new blank layer, set the Layer Options to Active Only, and try it from there.

If you have to cancel in the middle, it will still create a partial object, which will mess you up the next time, so delete all and paste the polygons again.

Pat

[land1]

Thanks for that, I will have a play today. I have created the polygons on a seperate class and turned everything else off for selection.

Creating these on a seperate layer would be better - less chance of the above situation occurring.

[islandmon]

Try creating your DTM in a separate clean file . then use WGR . This simple process

avoids all manner of problems and possible file corruption from failed conversions.