Line edit by calculation rule

Aнастасия88 — Wed, 20 Oct 2021 20:58:46 GMT

Hello,

I have not been able to make a proper code as I am new to Arcade. What I want to do is, split a line feature A by a start point of another line feature B. When I draw a line B from somewhere on the line A, the line A is split at the start point of line B. Also, the feature A has field "ID_A". For example, value of 10, the attribute of the "ID_A" is going to be updated to 11 and 12 respectively when the feature A is split into two features.

Based on a code that I found on web, I managed to prepare a code to split a line by a point feature. This works well that also achieve the update of attribute with using NextSequenceValue. But I am struggling to achieve this using a line feature instead of a point.

Much appreciated if anyone give me hint.

Re: Split line at intersection between line features

JohannesLindner — Fri, 15 Oct 2021 08:28:04 GMT

It seems like you have all the ingredients. Just use the first point of your new line B as split feature.

var start_point = Geometry($feature).paths[0][0] var fs_line_a = FeatureSetByName($datastore, "LineA", ["GlobalID"], true) var result = {"geometry": Geometry($feature)} var edit_line_a = {"className": "LineA", "adds": [], "deletes": []} for(var s in Intersects(fs_line_a, start_point)) { var path = Geometry(s).paths[0] // we don't care about intersections with start or end points of LineA features if(Intersects(path[0], start_point) || Intersects(path[-1], start_point)) { continue } // construct cutter var clip_path = Clip(Geometry(s), Extent(Buffer(start_point, 0.1))).paths[0] var a = (Angle(clip_path[0], clip_path[-1]) + 90) * PI/180 var m_geometry = Geometry($feature) var cutter = Polyline({ "paths": [ [ [start_point.x - 0.1 * cos(a), start_point.y - 0.1 * sin(a)], [start_point.x + 0.1 * cos(a), start_point.y + 0.1 * sin(a)] ] ], "spatialReference": Geometry($feature).spatialReference }) // cut LineA feature var line_a_cuts = Cut(Geometry(s), cutter) // delete the intersected LineA feature Push(edit_line_a .deletes, {"globalID": s.GlobalID}) // add both cut parts Push(edit_line_a .adds, {"geometry": line_a_cuts[0], "attributes": {"ID_A": NextSequenceValue("ID_A"}}) Push(edit_line_a .adds, {"geometry": line_a_cuts[-1], "attributes": {"ID_A": NextSequenceValue("ID_A"}}) } // return return {"result": result, "edit": [edit_line_a ]}

topic Re: Split line at intersection between line features in Attribute Rules Questions

Line edit by calculation rule

Re: Split line at intersection between line features