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Como encontro interseções de três vias?

PaulFrissora1

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Eu tenho duas camadas: Layer A tem Junctions como um arquivo de Pontos; Layer B tem edges como um arquivo de Linhas. <\/STRONG><\/P> <\/P>O problema: <\/STRONG>Estou procurando junctions que sejam intersectados por três (nem mais, nem menos) linhas. Como este: <\/P> <\/P> \<\/P> &nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp;&nb sp; <\/P>& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ; x-------------& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;& nbsp ;\u00A0&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a mp;a m p;a m p;a m p;/<\/P>& nbsp;;

Estou procurando uma maneira de encontrar esses junctions com uma seleção ou criando um shapefile separado. Parece que a forma de fazer isso pode ser através da criação de uma Geometric Network ou um conjunto de dados Network Analyst, mas não consegui encontrar muitas informações nos fóruns e na documentação online.&n bsp;<\/P>

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Alguém já fez isso antes?&n bsp;&n bsp;<\/P><\/BODY><\/HTML>

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Accepted answers

MikeMillerGIS

If you create a geometric network, you can take advantage of the Select Junction by Edge count tool in the water utility add in.

Water Utility Network Reporting toolbar - Water Utility Network Editing and Analysis | ArcGIS Solutions for Water

All comments

PaulFrissora1

Thank you! This worked perfectly

RobertBorchert

Are your lines broken at the intersections?

Create points from the end points of your lines. populate them with X,Y

bring them into MS Access and run a query to look for duplicates.

If the lines are not broken at intersections then generate points of vertices.

It sounds like your not already in a geometric network, so you will probably have lines that are really close to each other but not actually touching. So then use the points and the Generate Near Table analysis to find lines and the distance to them. If it is only a few inches to feet then it is an area to look at first.

This all makes a strong case for a geometric network, it gives you assurance that everything is connected and more accurate.

MikeMillerGIS

If you create a geometric network, you can take advantage of the Select Junction by Edge count tool in the water utility add in.

Water Utility Network Reporting toolbar - Water Utility Network Editing and Analysis | ArcGIS Solutions for Water

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