topic Re: find features within distance in .NET Maps SDK Questions

find features within distance

MauricioRamirez1 — Tue, 11 Feb 2020 22:43:46 GMT

I have a map service hosted locally on my ArcGIS server with the location of all the fire hydrants in my city. I want to know if there's a way to find the nearest hydrant to the location I click on the map. Or to search for a hydrant within 50 meters.

Re: find features within distance

dotMorten_esri — Wed, 12 Feb 2020 19:11:44 GMT

You could use GeometryEngine to create a 50m buffer around your point, then query the table with the hydrants (ie the Url to you mapservice + "/" + the layer id). Something along the lines of:

var searchPolygon = GeometryEngine.BufferGeodetic(clickPoint, 50, LinearUnits.Meters);
var table = new ServiceFeatureTable(new Uri("https://PathToFireHydrantSubLayer"));
var hydrants = await table.QueryFeaturesAsync(new QueryParameters() { Geometry = searchPolygon });

Re: find features within distance

MichaelBranscomb — Tue, 18 Feb 2020 20:45:42 GMT

...And if you would like to know actual travel distance/time then I suggest taking a look at the following samples:

- Find closest facility to an incident (interactive) | ArcGIS for Developers

- Find service area | ArcGIS for Developers

Cheers

Mike