topic Re: Construct Polygons from .dwg polylines in ArcGIS Pro Questions

Construct Polygons from .dwg polylines

GregoryKim — Thu, 13 Jun 2019 22:27:29 GMT

When using the Construct Polygons tool in ArcGIS Pro, I am not able to select the .dwg polylines so I can generate the polygon. I am following the instructions found here: https://pro.arcgis.com/en/pro-app/help/editing/construct-polygons-from-features.htm.

I also have a question about line 3 of the instructions.

Click Active Select and select the polyline features from which you want to create the new polygon features. The features must be on the same layer.

What does it mean when it states "The features must be on the same layer." Does that mean I cannot select polylines from a .dwg to create into a feature class?

When I try to select the polyline. It flashes, but does not get selected. Video is attached.

Re: Construct Polygons from .dwg polylines

BillFox — Thu, 13 Jun 2019 23:02:39 GMT

does the similar process work in ArcMap?

Re: Construct Polygons from .dwg polylines

JakeSkinner — Fri, 14 Jun 2019 12:17:02 GMT

Hi Gregory,

You will need to convert the DWG to a feature class. You will then be able to select the polylines in the feature class and construct a polygon.

Re: Construct Polygons from .dwg polylines

GregoryKim — Fri, 14 Jun 2019 14:43:16 GMT

@Bill - Yes, the Construct Polygons tool in ArcMap works without issues and with native dwg polylines.

Jake, thanks for the reply. Our current workflow requires editing in AutoCAD. So I will have to export the polylines to a feature class and then select the object in the feature class to create a polygon?

Do you know if this is documented somewhere? This is not the case with ArcMap.

Re: Construct Polygons from .dwg polylines

JakeSkinner — Fri, 14 Jun 2019 14:52:49 GMT

Looks like this workflow has not been implemented within ArcGIS Pro, yet.

Re: Construct Polygons from .dwg polylines

GregoryKim — Fri, 14 Jun 2019 15:51:46 GMT

So, I exported the dwg polyline from AutoCAD to a shape file, added it to my project, ran the construct polygon tool and it worked without errors.

@ESRI, please add the ability to select AutoCAD polylines in ArcGIS Pro and run the construct polygon tool.

Thanks for everyone's replies.

Re: Construct Polygons from .dwg polylines

BillFox — Fri, 14 Jun 2019 18:21:37 GMT

did that retain the true curves?

Re: Construct Polygons from .dwg polylines

GregoryKim — Fri, 14 Jun 2019 20:40:27 GMT

Bill, Although I have never had a problem of the conversion keeping its true shape, you had me curious, so I did a little test.

The black lines are from AutoCAD. The red line is from a shape file, exported from the dwg. The orange circle/polygon is from a geodatabase feature class after running the Construct Polygons from ArcGIS Pro on the shape file polylines. Everything looks pretty good.

Best Regards,

Greg

Re: Construct Polygons from .dwg polylines

KoryKramer — Fri, 14 Jun 2019 20:55:36 GMT

Yeah, but I think Bill knew the answer when he asked the question?

http://desktop.arcgis.com/en/arcmap/latest/manage-data/shapefiles/geoprocessing-considerations-for-shapefile-output.htm

I guess it would depend whether they're true curves in the original data. Definitely worth being aware of shapefile limitations.

Re: Construct Polygons from .dwg polylines

Scott_Harris — Fri, 21 Jun 2019 19:28:40 GMT

Hi Gregory,

Thanks for reporting this. We plan on fixing this for ArcGIS Pro 2.5. Note that 2.4 is coming out next, so you'll have to wait a release to see this fixed, unfortunately, but it's definitely on our radar now.

Thank you,

Scott

Re: Construct Polygons from .dwg polylines

AdamDaily — Fri, 24 Jan 2020 22:42:39 GMT

Scott,

Is this construct polys tool still going to be fixed in Pro 2.5, and do you know how soon that will become available? I heard it scheduled for a January release.

Re: Construct Polygons from .dwg polylines

Scott_Harris — Fri, 24 Jan 2020 22:53:10 GMT

Hi Adam,

Yes, Construct Polygons works with lines from CAD drawings at 2.5. As far as release date for 2.5:

Here is a recent discussion about it: https://community.esri.com/docs/DOC-13641-arcgis-pro-roadmap-july-2019#comment-81988

Thanks,

Scott

Re: Construct Polygons from .dwg polylines

AdamDaily — Fri, 24 Jan 2020 23:12:32 GMT

Thank you Scott,

Looking forward to all the new features in 2.5.

Re: Construct Polygons from .dwg polylines

dala — Thu, 06 Feb 2020 20:51:36 GMT

I am having the same issue as the initial post. Using Pro 2.4.3 Advanced License. However, I am using regular shapefiles. I cannot select a feature. Somehow once, I got a selection but the "Construct" button was still greyed out. Wondering if I'm interpreting the use of this tool incorrectly. Or is this something that will work in 2.5?

I have a shapefile of contiguous polygons. I created a new shapefile where I want to add some of the polygons from the first shapefile to the second. I will add individual polygons periodically (over months or years), which is why I'm not creating a new file from a selection. Seems like if I can use the Construct Polygons tool and select one polygon from the first shapefile to create it in the second shapefile, that would be simplest.

Re: Construct Polygons from .dwg polylines

Scott_Harris — Thu, 06 Feb 2020 21:16:13 GMT

Hi Danielle,

Construct Polygon is used to create polygons from closed loops of selected lines. So you need lines and polygons in the map. With Construct Polygons open, select the lines that form a closed loop, choose a polygon feature template and click Construct.

Construct polygons from features—ArcGIS Pro | Documentation

In your case, it sounds like Copy > Paste Special would work to copy polygons from one layer to another.

Copy and paste features using the clipboard—ArcGIS Pro | Documentation

I hope this helps. Thanks,

Scott

Re: Construct Polygons from .dwg polylines

dala — Wed, 12 Feb 2020 18:44:05 GMT

Hi Scott,

Thanks so much! I can't believe I didn't know about this or that any of my search queries didn't pop this up. I'll give it a try and let you know if there's any issues. Thanks!

Re: Construct Polygons from .dwg polylines

GregoryKim — Tue, 25 Feb 2020 21:31:49 GMT

The Construct Polygons tool in ArcGIS Pro v2.5 has been fixed. Thank you Scott and ESRI team.