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How calculate polygon dimensions

NajdALHanahnah

Dear All

There is a way to calculate polygon dimensions (Side) , if i ma working on ArcObject (Java or .NET) any suggestions ...

especially with complex polygon

Thanks

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NajdALHanahnah

Hi Riyas

Thanks for your post , really appropriate that m, let me test it today and i will give you the feedback ...

thanks

RiyasDeen

Hi Najd,

Try below code.

Note: Even if there is a suttle change in direction between segments (i.e. not exactly 180 degree), it'll be treated as change and gets counted as different section.

Do post back if this worked.

                        ISegmentCollection segments = (ISegmentCollection)lta.Shape;
                        List<double> dimensions = new List<double>();
                        if (segments != null)
                        {
                            double length = 0;
                            for (int idx = 0; idx < segments.SegmentCount; idx++)
                            {
                                ISegment currentSegemnt = segments.get_Segment(idx);
                                
                                if (idx + 1 < segments.SegmentCount)
                                {
                                    ISegment otherSegment = segments.get_Segment(idx + 1);


                                    if (currentSegemnt.ReturnTurnDirection(otherSegment) != 1)
                                    {
                                        dimensions.Add(length);
                                        length = 0;
                                    }
                                }
                                else
                                {
                                    dimensions.Add(length);
                                }
                            }
                        }

NajdALHanahnah

Thanks Riyas for your post , i saw what you put and really interesting idea , but how i can do that in coding level , if

you have any idea plz help me ...thanks

RiyasDeen

Below my suggestion, never implemented this scenario personally before just a possible solution

Cast your polygon to ISegmentCollection
Iterate through each segment
Use ReturnTurnDirection ArcObjects 10 .NET SDK Help‌ on your segments
If No Turn returned ArcObjects 10 .NET SDK Help then sum your segment length
Whenever there is a turn break your summation and restart
At the end you loop you would have got your dimensions.

nicogis

... if your polygons are composed from only lines ...

nicogis

you can see code in this link : IPolygon4.ExteriorRingBag Property (ArcObjects .NET 10 SDK)‌

in this code when you loop on points you can get distance from point(i) to point(i+1) ...

NajdALHanahnah

Dear Mr.Dan

I am not looking for perimeter i am looking for dimensions for each side ...

see what i meant >>>

DanPatterson_Retired

I think the term is "perimeter" that you are looking for. Did you do a search using arcobjects perimeter first?

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