topic Re: SearchTolerance in ArcGIS Pro in ArcGIS Pro SDK Questions

SearchTolerance in ArcGIS Pro

KrisCulin — Thu, 25 Jun 2020 15:35:34 GMT

Hi,

In ArcObjects, there is a SearchTolerance property on IMxDocument.

Is there an equivalent to this in the ArcGIS Pro SDK? If so, where can I retrieve the value?

If not, what can I do to mimic what SearchTolerance does in ArcMap? We use it with the Envelope.Expand method when detecting if a click point is near any existing features.

In ArcMap, SearchTolerance changes depending on the zoom. The farther you zoom out, the larger the tolerance is and vice-versa.

TIA.

Kris

Re: SearchTolerance in ArcGIS Pro

UmaHarano — Fri, 26 Jun 2020 16:22:03 GMT

In Pro, you can use the SelectionEnvironment class.

SelectionTolerance

SetSelectionTolerance

Thanks!

Uma

Re: SearchTolerance in ArcGIS Pro

KrisCulin — Fri, 26 Jun 2020 16:26:43 GMT

Thanks Uma.

Followup - the value is 3 and appears to be in Device Units which I assume is pixels. How can I convert this value to the map linear unit so I can pass it into Envelope.Expand? Is there an easy way to do this? ArcObjects did this automatically with the SearchTolerance property (SearchTolerancePixels was the value in pixels).

TIA.

Kris

Re: SearchTolerance in ArcGIS Pro

Anonymous User — Sun, 12 Dec 2021 08:28:32 GMT

In the past ive calculated the pixel linear distance from a known point in the map, either the mouse location or the center of the map as a MapPoint.

    private Polygon CreateSearchPolygon(MapPoint mapPoint, int pixels)
    {
      //get search radius
      var screenPoint = MapView.Active.MapToScreen(mapPoint);
      var radiusScreenPoint = new System.Windows.Point((screenPoint.X + pixels), screenPoint.Y);
      var radiusMapPoint = MapView.Active.ScreenToMap(radiusScreenPoint);
      var searchRadius = GeometryEngine.Instance.Distance(mapPoint, radiusMapPoint);‍‍‍‍‍‍‍

In the example above i was creating a search polygon around a mappoint by pixels.

The variable searchRadius is your linear distance.

Re: SearchTolerance in ArcGIS Pro

KrisCulin — Fri, 26 Jun 2020 17:11:20 GMT

Than you Sean. This is exactly what I need.

Much appreciated.

Kris

Re: SearchTolerance in ArcGIS Pro

RobertGurrieri — Sun, 28 Jun 2020 05:08:38 GMT

Hi Uma,

Is SelectionTolerance used by ArcGIS Pro itself (e.g. is it used by the native select tool)? If so, can the tolerance setting be controlled by the user (is there an option in the UI somewhere)?

Thanks,

Rob.

Re: SearchTolerance in ArcGIS Pro

UmaHarano — Mon, 29 Jun 2020 21:47:16 GMT

Hi Robert,

I don't see an UI setting for Search Tolerance either.

Uma

Re: SearchTolerance in ArcGIS Pro

RobertGurrieri — Tue, 30 Jun 2020 15:16:40 GMT

Thank you Uma.

Rob.