topic Re: Attribute Rule: Auto Populate Fields to Nearest Feature in ArcGIS Pro Questions

Attribute Rule: Auto Populate Fields to Nearest Feature

YongXin — Tue, 02 Nov 2021 06:24:17 GMT

I am working with a large set of Ontario watercourses and wish to automatically populate a field with the nearest road network. In the picture below, the watercourses are represented by the blue lines and the road network is represented by the purple lines.

I am trying to have a field titled NearestRoad auto-populate with the nearest road network that is 100km from it. Is there a way to go about this? Thank you!

Re: Attribute Rule: Auto Populate Fields to Nearest Feature

JohannesLindner — Tue, 02 Nov 2021 07:30:52 GMT

function closest_feature(test_feature, compare_feature_set) { var min_distance = 9999999 var closest_feature = null for(var f in compare_feature_set) { var d = Distance(test_feature, f) if(d < min_distance) { min_distance = d closest_feature = f } } return closest_feature } var roads = FeatureSetByName($datastore, "RoadFeatureclass", ["RoadID"], true) var waterway_buffer = Buffer($feature, 100, "kilometers") var close_roads = Intersects(roads, waterway_buffer) var closest_road = closest_feature($feature, close_roads) if(closest_road != null) { return closest_road.RoadID } return null

Re: Attribute Rule: Auto Populate Fields to Nearest Feature

DanPatterson — Tue, 02 Nov 2021 09:10:12 GMT

Do you want each tributary of a watercourse tested separately or if any tributary is within 100 km of a road?

That will make a big difference on the outcome. For example, how many different ones are depicted in your image?