topic Re: Cut feature line between two non-touching feature points in ArcGIS Pro Questions

Cut feature line between two non-touching feature points

NikolajKlausen — Tue, 26 Jan 2021 09:49:29 GMT

Hello,

How can I automatically cut a feature line between two non-touching points of a different feature?

Explanation : I work for a railway construction company, and it is important for us to identify track possessions. A track possession is a line of railway between two signals. I have a layer for railway lines and a layer for signals, now I am interested in automatically generating track possessions.

Example: I have tracks (red lines) and signals (green circles)

I create a new feature layer with the track for which I have a track possession, in this case track 2. In addition, I create a new feature layer with 2 green circles.

Now I want to "cut" the track, so I get a track segment between the two green circles. I don't know how to do this, so I created a new line and manually drew it on top of the track between the two green circles. Then I added a buffer ring around this new line, and end up with the following:

I can now add the original layers to my map and I have now created 1 track possession :

Is there any clever way of doing this automatically?

Thank you in advance,

Nikolaj

Re: Cut feature line between two non-touching feature points

DanPatterson — Tue, 26 Jan 2021 10:43:03 GMT

Did you try?

Split Line at Point (Data Management)—ArcGIS Pro | Documentation

If Search Radius (search_radius in Python) is unspecified, the nearest point will be used to split the line feature. If a Search Radius is specified, all points within the search radius are used to split the line.

Re: Cut feature line between two non-touching feature points

NikolajKlausen — Tue, 26 Jan 2021 11:37:03 GMT

Hey Dan,

Thank you for your reply, that seems to be a viable solution.

I can see it requires an extension which my current license does not have.

Is it correctly understood that the functionality of my scripts in Python also depends on my ArcGIS Pro license?

Thank you in advance

Re: Cut feature line between two non-touching feature points

DanPatterson — Tue, 26 Jan 2021 11:56:04 GMT

Yes it does require an advanced license and your access to tools in python scripts would be limited to your license level. That particular tool doesn't require an extra extension, it is part of the Data Management toolset.

You will be able to construct transect lines between two points if the signals are sequentially ordered

XY To Line (Data Management)—ArcGIS Pro | Documentation

Re: Cut feature line between two non-touching feature points

mody_buchbinder — Wed, 27 Jan 2021 05:34:13 GMT

Here is a code sample that gets point (pt) and return a snap point on a line in roadFC in a tolerance tol

def returnSnapPoint(pt): try: if(pt == None): return None # return the point snap to closest line or None if(arcpy.Exists('road_lyr') == True): arcpy.Delete_management('road_lyr') arcpy.MakeFeatureLayer_management(roadFC, 'road_lyr') arcpy.SelectLayerByLocation_management('road_lyr', 'WITHIN_A_DISTANCE', [pt], tol) c = int(arcpy.GetCount_management('road_lyr')[0]) if( c == 0): return None dist = 1000 closeLine = None # get closest line with arcpy.da.SearchCursor('road_lyr', ["SHAPE@"]) as cursor: for row in cursor: if(closeLine == None): # first closeLine = row[0] dist = closeLine.distanceTo(pt) else: if(closeLine.distanceTo(pt) > dist 😞 continue # not closest closeLine = row[0] dist = closeLine.distanceTo(pt) return closeLine.snapToLine(pt)

Re: Cut feature line between two non-touching feature points

NikolajKlausen — Wed, 27 Jan 2021 06:54:07 GMT

Thank you Mody,

I'll try it out and let you know if it works out for me.

Cheers,

Nikolaj