{"id":173231,"date":"2010-11-15T21:09:25","date_gmt":"2010-11-15T21:09:25","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/?post_type=blog&p=173231"},"modified":"2018-12-18T11:54:34","modified_gmt":"2018-12-18T19:54:34","slug":"intersect-lines-make-junction-points","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/mapping\/intersect-lines-make-junction-points","title":{"rendered":"Intersect Lines (Make Junction Points)"},"author":4331,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[22941],"tags":[68201,38411],"industry":[],"product":[36991],"class_list":["post-173231","blog","type-blog","status-publish","format-standard","hentry","category-mapping","tag-intersect","tag-mapping-center","product-arcgis-desktop"],"acf":{"short_description":"I am trying in Arc 9.3 to intersect two line features (stream and road), retain some of the attribution information in them and then output","flexible_content":[{"acf_fc_layout":"content","content":"

Question:<\/strong>\u00a0Hi,<\/p>\n

I am trying in Arc 9.3 to intersect two line features (stream and road), retain some of the attribution information in them and then output a point file where these two intersect.<\/p>\n

How do i do this in Arc 9.3? Do i intersect first and then is there a tool to create points from the intersections?<\/p>\n

Thanks,<\/p>\n

Answer:<\/strong>\u00a0As Unintuitive as it may sound you will start with the\u00a0Feature to Line tool<\/a>, with your roads and streams as the input feature classes.<\/p>\n

With the result of the Feature to Line tool, do the following to derive points at the intersections:<\/p>\n

1.\u00a0 From the Selection menu choose Select by Attributes, and select features with this where clause:\u00a0 \u201cFID_Roads\u201d = -1 (this will select the streams in the output of the Feature to Line tool.\u00a0 Use whatever attribute that actually refers to the FIDs for your roads, given the feature class name.)<\/p>\n

2.\u00a0 From the Selection Menu choose Select by Location:\u00a0 Change the Selection Method to \u201cadd to the currently selected features in\u201d, and choose the output from the feature to line tool in the \u201cselect features in\u201d list.\u00a0 The selection operation is intersect, and you will be intersecting to the same layer.<\/p>\n

3.\u00a0 To Get the points at your intersections, right click in the Table of Contents on your output from the Feature to line tool with the selection, and choose Data, and then Export to save the selected features to a new feature class.\u00a0 You must save these in a geodatabase, in a feature dataset (you will need to prepare this in advance so it uses the same coordinate system as your data).<\/p>\n

4.\u00a0 Once your selected features are saved, you can use ArcCatalog to create a geometric network with the features you saved in step 3. Use the default settings for the Create Geometric Network wizard. A by-product of a geometric network is a set of points for the junctions\u2013copy the junctions feature class to a location and different name outside of the feature dataset that contains the geometric network (you cannot edit or use the Junctions feature class that is associated with a geometric network).\u00a0 The only issue with the junctions is there will be junction points at the ends of lines (I don\u2019t think you want these, so step 5 addresses that).<\/p>\n

5.\u00a0 Once you have a copy of the junction points add them to ArcMap, and use the\u00a0spatial join tool<\/a>\u00a0with the copy of your junctions as the Target Features, and the output from step 3 (selected lines saved to feature class) as the join features.\u00a0 This will product a point layer with an attribute called Join_Count.\u00a0 Set a definition query for \u201cJoin_Count\u201d > 1. This will give you a layer with points at the locations where roads and streams intersect.\u00a0 You can save this or use it as is.<\/p>\n

Sorry, that was a bit of a lengthy procedure to get the result you so simply asked for.\u00a0 If anyone figures out a faster\/easier way, please post it as a comment.<\/p>\n

Formerly a Mapping Center Ask a Cartographer \u00a0Q & A.<\/em><\/p>\n"}],"authors":[{"ID":4331,"user_firstname":"Aileen","user_lastname":"Buckley","nickname":"Aileen Buckley","user_nicename":"abuckley","display_name":"Aileen Buckley","user_email":"abuckley@esri.com","user_url":"","user_registered":"2018-03-02 00:15:57","user_description":"Dr. Aileen Buckley is a cartographer researcher and Senior Principal GIS Engineer at Esri. I'm on the ArcGIS Living Atlas of the World Team, making, writing, and talking about maps. I'm also involved in a number of cartographic societies and association, and I'm the chair of the ICA Ethics in Cartography Commission.","user_avatar":""}],"related_articles":"","card_image":false,"wide_image":false},"yoast_head":"\nIntersect Lines (Make Junction Points)<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/mapping\/intersect-lines-make-junction-points\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Intersect Lines (Make Junction Points)\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.esri.com\/arcgis-blog\/products\/arcgis-desktop\/mapping\/intersect-lines-make-junction-points\" \/>\n<meta property=\"og:site_name\" content=\"ArcGIS Blog\" \/>\n<meta property=\"article:publisher\" 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