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I have a process I use QGIS/mmqgis for. I have a hex grid that I use for binning large data, and I have that hex grid overlaying a road network. I use the "Join Attributes by Location (Summary)" tool to generate a new road network that has a series of statistics derived from all the cells a line traverses. Maybe more helpful to see the principle:

road statistics from hex grid

QGIS will give me a new road network and each feature has a min, max, mean, sum, range, etc derived from all the hex cells that feature intersects. In the example graphic, the processed top line would have a sum of 500 and the tributary line would have a sum of 495.

I have tried to reproduce this analysis in ArcGIS Pro for a series of users who only have Esri tools, and have not been able to do so. I have tried using Summarize Within, and this "sort of" works, but it creates a duplicate of each feature (line) for each hex cell it traverses and thus gives me no statistics.

How would I go about accomplishing this?

Pythonic solutions are fine as long as there is an explanation of which method to use in particular.

  • What precisely have you tried with ArcGIS Pro? Where precisely are you stuck? – PolyGeo Mar 26 at 18:57
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    Intersect and summarise using unique line id. – FelixIP Mar 26 at 19:43
  • I have the polyline layer loaded, I have the hex bins that contain a 'count' field. I have tried: Spatial Join, and have tried setting the point count field (from the hex cells) to "mean" to run an average; I've also tried using Summarize Within, but both of these approaches leave me with duplicate geometry with no summarized point count statistics. So regarding the example i posted, Arc gives me 4 duplicate lines, each with an attribute of 150, 175, 150, and 25, respectively. – auslander Mar 26 at 19:48
  • Use summary statistics tool on that and perhaps read my 1st comment again. – FelixIP Mar 26 at 19:59
  • @FelixIP that worked, thanks! If you want to flesh it out and put it as an answer I'll mark it correct. – auslander Mar 26 at 20:51
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Input:

enter image description here

Workflow that will handle overlaps:

arcpy.Intersect_analysis("LINES #;POLYGONS #", "./intersect.shp")
arcpy.DeleteIdentical_management("intersect", "LINE_ID;PGON_ID")
arcpy.Statistics_analysis("intersect", "./intersect_Statistics", "W SUM", "LINE_ID")

Output:

enter image description here

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