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I have two line dataset that represent the same roads:

  • First one has very precise geometry
  • Second one has an approximative geometry, but very interesting attribute.

What I want to achieve is to have the geometry of the first one and the attribute of the second one. I wish to find an automated way to do it. There are many roads and it would takes decades to do it by hand.

I prepared some examples:

At first I have this data:

What I have at the beginning

And I want to transfer the good attributes to the good geometry:

enter image description here

To obtain something like that:

enter image description here

I had a look at the transfer attribute in ArcMap, however, it seems that it can't split the destination geometry in order to represent all the originals attributes values. I probably need something that first conflate the bad geometry on the good one and then split it according to the attributes.

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    Split good geometry into segment, spatial join bad geometry attributes to the segments, dissolve. – BERA Jan 30 '18 at 15:46
  • @BERA But how do I know where to split the good geometry? I can't do it by hand, because there are many many roads. – Legisey Jan 30 '18 at 15:48
  • There are tools for splitting. Split every 1 meter or shorter if you need more precision – BERA Jan 30 '18 at 15:49
  • @BERA Are you thinking of something like the methods mentionned in this page? The problem is that I don't know where to split it. All these methods assume that you know this, or that you split it at regular interval, or percentages. In my case, I need to split it according to another line. – Legisey Jan 30 '18 at 15:53
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    As far as knowing where to split the good line's geometry, you could try: take the bad geometry features, run feature vertices to points (both ends setting) pro.arcgis.com/en/pro-app/tool-reference/data-management/… and use resulting points to run Split Line at Point (with search radius specified) pro.arcgis.com/en/pro-app/tool-reference/data-management/…. I've not tried personally, but logic says it should help you get the good geometry split at least to prep for attribute transfer. – John Jan 30 '18 at 17:09
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Here's an alternative (more complicated, but generally more accurate) idea:

  1. Use the Split Line at Vertices tool to chop your bad geometry into small discrete segments
  2. Use Generate Points Along Lines and check 'Include End Points' but don't specify a distance - you'll get a point for each endpoint of your segments
  3. Use Near and check 'Location' with that point dataset from step 2 and your good geometry to get the nearest corresponding points on your good geometry
  4. Convert those NEAR_X and NEAR_Y fields to their own dataset using Make XY Event Layer
  5. Use Split Line At Point with your good geometry and and the point dataset from 4

You can now transfer attributes and dissolve. This works well when your vertices have no predictable spacing but your dataset is large. Otherwise you could just use @Legisey's answer with a very small distance (something below the spatial resolution of your dataset, otherwise you risk making your dataset less accurate).

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I tried the method proposed by @BERA and it worked pretty well. What I did:

  • Cut the "good geometry" into 10 meters segements
  • Run the Transfer Attribute from ESRI
  • Dissolve the result to reduce the number of segments

I guess that, with this method, I get about 75% of cases right. The other are not mapped. I get very few false positive.

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