ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Desktop.Core.DeviceLocation Namespace / DeviceLocationProperties Class / AccuracyThreshold Property
Example Version

AccuracyThreshold Property
Gets and sets the acceptable accuracy threshold in meters.
Syntax
public double AccuracyThreshold {get; set;}
Remarks
When the quality of the device location falls outside of the AccuracyThreshold, the color of the location symbol shown on the map will switch from blue to red. The AccuracyThreshold may also have an impact on editing.
Example
Connect to a Device Location Source
var newSrc = new SerialPortDeviceLocationSource();

//Specify the COM port the device is connected to
newSrc.ComPort = "Com3";
newSrc.BaudRate = 4800;
newSrc.AntennaHeight = 3;  // meters
                           //fill in other properties as needed

var props = new DeviceLocationProperties();
props.AccuracyThreshold = 10;   // meters

// jump to the background thread
await QueuedTask.Run(() =>
{
  //open the device
  DeviceLocationService.Instance.Open(newSrc, props);
});
Get Current Device Location Source and Properties
bool isConnected = DeviceLocationService.Instance.IsDeviceConnected();

var src = DeviceLocationService.Instance.GetSource();

if (src is SerialPortDeviceLocationSource serialPortSrc)
{
  var port = serialPortSrc.ComPort;
  var antennaHeight = serialPortSrc.AntennaHeight;
  var dataBits = serialPortSrc.DataBits;
  var baudRate = serialPortSrc.BaudRate;
  var parity = serialPortSrc.Parity;
  var stopBits = serialPortSrc.StopBits;

  // retrieving spatial reference needs the MCT
  var sr = await QueuedTask.Run(() =>
  {
    return serialPortSrc.GetSpatialReference();
  });

}
var dlProps = DeviceLocationService.Instance.GetProperties();
var accuracy = dlProps.AccuracyThreshold;
Update Properties on the Current Device Location Source
await QueuedTask.Run(() =>
{
  var dlProps = DeviceLocationService.Instance.GetProperties();
  //Change the accuracy threshold
  dlProps.AccuracyThreshold = 22.5; // meters

  DeviceLocationService.Instance.UpdateProperties(dlProps);
});
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also