# Model Lines to Topography Problem **URL:** \ **Category:** Revit\ **Created:** [July 23, 2020, 9:20am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295 "2020-07-23T09:20:54Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![Gcf\_Design](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@Gcf\_Design](https://forum.dynamobim.com/u/Gcf_Design)\ **Post date:** [July 23, 2020, 9:20am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/1 "2020-07-23T09:20:54Z")
When l have certain model lines and certainly more than 3 model lines, Dynamo (due to me likely), adds additional linework upon the topography. How can l create as many model lines as l like, that are joined and relate them to the topo, then populate successfully an adaptive component? I am practically there and it works for a single or 2-3 lines, but not watertight workflow, so l must be missing something. Any thoughts appreciated. ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/c/a/cad144e88a2faaa47961015b35b153ec57d141df.png) ---
**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\ **Post date:** [July 23, 2020, 9:44am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/2 "2020-07-23T09:44:18Z")
Try fiddling with the working range ---
**Author:** ![Gcf\_Design](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@Gcf\_Design](https://forum.dynamobim.com/u/Gcf_Design)\ **Post date:** [July 23, 2020, 10:11am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/3 "2020-07-23T10:11:48Z")
Hi Marcel, What is the working range in terms of this scenario? ---
**Author:** ![Gcf\_Design](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@Gcf\_Design](https://forum.dynamobim.com/u/Gcf_Design)\ **Post date:** [July 23, 2020, 10:14am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/4 "2020-07-23T10:14:07Z")
Marcel, I found the working range and testing now. ---
**Author:** ![Gcf\_Design](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@Gcf\_Design](https://forum.dynamobim.com/u/Gcf_Design)\ **Post date:** [July 23, 2020, 10:16am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/5 "2020-07-23T10:16:51Z")
I changed it from ‘medium’ to ‘small’ and appears to either to be taking much longer or has crashed. ---
**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\ **Post date:** [July 23, 2020, 10:29am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/6 "2020-07-23T10:29:31Z")
Can you show the graph with all previews enabled? My first thought was that the points you have created are very close to each other. Setting the working range has some effect on the calculations done. Another way around that is to scale the lines, do the thing that needs to be done and then scale it down again. ---
**Author:** ![Gcf\_Design](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@Gcf\_Design](https://forum.dynamobim.com/u/Gcf_Design)\ **Post date:** [July 23, 2020, 11:55am UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/7 "2020-07-23T11:55:09Z")
Hi Marcel, The error seems to occur when l have a straight and a radius, then it cannot cope working how to resolve multiple curves… ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/2/2/22f2a02579ef364d31196e8d4a23df69d1473e30.png) ![image](https://us1.discourse-cdn.com/flex022/uploads/dynamobim/original/3X/a/9/a9c3663bd2a28ada597f0b6314078648d4757927.png) ---
**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\ **Post date:** [July 23, 2020, 12:15pm UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/8 "2020-07-23T12:15:28Z")
Have a look at this thread > [@Merging Multiple Curves into one Curve without using Polyline](https://forum.dynamobim.com/t/merging-multiple-curves-into-one-curve-without-using-polyline/2475): > > I’m trying to create a WallByCurveAndHeight however the problem I have with my curves is that they are separated and therefore create not one continuous wall but multiple walls. Is there a way I can merge all these curves into one curve without converting it to a polycurve? The only reason is that the WallByCurveAndHeight node does not read polycurves.   [NeedHelp] ---
**Author:** ![Gcf\_Design](https://avatars.discourse-cdn.com/v4/letter/g/77aa72/32.png) [@Gcf\_Design](https://forum.dynamobim.com/u/Gcf_Design)\ **Post date:** [July 23, 2020, 12:40pm UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/9 "2020-07-23T12:40:11Z")
I have tried all of the suggestions, sadly none worked. Many thanks though. ---
**Author:** ![Marcel\_Rijsmus](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.dynamobim.com/marcel_rijsmus/32/8539_2.png) [@Marcel\_Rijsmus](https://forum.dynamobim.com/u/Marcel_Rijsmus)\ **Post date:** [July 23, 2020, 1:01pm UTC](https://forum.dynamobim.com/t/model-lines-to-topography-problem/53295/10 "2020-07-23T13:01:05Z")
Without seeing your graph, it was the best i could do.