I am looking for the language to use to even begin researching the process below. I am fairly new to ArcGIS Pro and struggle with finding the right terminology:
Is there a way I can have ArcGIS Pro group high average values along a series of connected/touching line or polygon segments? For example, let's say I have a series of 12 line segments, each with its own value:
5-2-1-9-3-9-2-1-1-1-8-1
I want to group the set of data beginning with the "5" and ending with the second "9" and then give that group the value of its average and/or sum.
My application is this: I have crash counts for street segments and intersections. I would like to ArcGIS Pro locate combinations of continuous street+intersection segments where these groupings have some sort of significance. I know I would need to put minimum and maximum segment lengths and the like.
Thank you for any help.
Polylines and linestrings/multi-linestrings (same geometries, different name depending on geometry object model) are un-closed, ordered collections of paths (segments and/or arcs). Attribution happens at the geometry level and not the part level, so one would not have a polyline in ArcGIS comprising 12 lines segments with each segment having its own values assigned.
Additional data structures are built on top of geometries, e.g., routes define a measurement system on top of polylines, and route feature classes and event tables are used to implement linear referencing in ArcGIS. Since you mention street segments and intersections, I am guessing you are working with a routed feature classes.
It is most helpful to provide some sample or example data along with your description because similar to pictures, a data set is worth a thousand or more words. If you can't share sample or example data, then some graphics illustrating the situation are second best.
Thanks for even trying to help with this. Also, thanks for taking time to explain the terminology. I hope you know it is incredibly helpful.
Street data - https://www.denvergov.org/opendata/dataset/city-and-county-of-denver-street-centerline
Crash Data - https://www.denvergov.org/opendata/dataset/city-and-county-of-denver-traffic-accidents
I am not asking anyone to do the project. Just help me know what tools to even begin looking at and reading up on. I really want to learn. After taking these first steps, this will also help me incorporate some of the volume data and other data available to me.
Again, I am able to identify high volume crash clusters or intersections. I am able to attach crash counts to either street segment or intersection. However, in addition to that, I would like to identify stretches of road of at least 5 or so blocks that may need attention do to total crash volume relative to length. Honestly, the min and max street segment count side is something I'd have to consider once I can play with the data.
I really struggle with the language part of this, so I hope I explained myself well.