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Fix threading issue in plotview

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This commit is contained in:
Morten Nielsen 2020-09-07 20:01:34 -07:00
parent 52b402323a
commit 84bb5f5118
1 changed files with 15 additions and 7 deletions
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22
src/SampleApp.WinDesktop/PointPlotView.xaml.cs
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@ -1,7 +1,9 @@
using Esri.ArcGISRuntime.Location;
using System;
using System.Collections.Generic;
using System.Data.SqlTypes;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using System.Transactions;
using System.Windows;
@ -88,14 +90,15 @@ namespace SampleApp.WinDesktop
});
return;
}
var latAvr = locations.Select(l => l.Latitude).Average();
var lonAvr = locations.Select(l => l.Longitude).Average();
var measurements = locations.ToArray(); // Grab copy to avoid threading issues
var latAvr = measurements.Select(l => l.Latitude).Average();
var lonAvr = measurements.Select(l => l.Longitude).Average();
//List<double> lonDistances = new List<double>(locations.Count);
//List<double> latDistances = new List<double>(locations.Count);
List<double> distances = new List<double>(locations.Count);
List<double> distances = new List<double>(measurements.Length);
var locations2 = new List<Point>();
foreach (var l in locations)
foreach (var l in measurements)
{
var d = Vincenty.GetDistanceVincenty(latAvr, lonAvr, l.Latitude, l.Longitude);
var dLat = Vincenty.GetDistanceVincenty(latAvr, lonAvr, l.Latitude, lonAvr);
@ -180,8 +183,13 @@ namespace SampleApp.WinDesktop
}
var stdDevLat = Math.Sqrt(locations2.Sum(d => (d.Latitude - latAvr2) * (d.Latitude - latAvr2)) / locations2.Count);
var stdDevLon = Math.Sqrt(locations2.Sum(d => (d.Longitude - lonAvr2) * (d.Longitude - lonAvr2)) / locations2.Count);
var zAvr = locations.Select(l => l.Z).Where(l => !double.IsNaN(l)).Average();
var stdDevZ = Math.Sqrt(locations.Select(l => l.Z).Where(l => !double.IsNaN(l)).Sum(d => (d - zAvr) * (d - zAvr)) / locations.Select(l => l.Z).Where(l => !double.IsNaN(l)).Count());
var zAvr = measurements.Select(l => l.Z).Where(l => !double.IsNaN(l)).Average();
var stdDevZ = Math.Sqrt(measurements.Select(l => l.Z).Where(l => !double.IsNaN(l)).Sum(d => (d - zAvr) * (d - zAvr)) / measurements.Select(l => l.Z).Where(l => !double.IsNaN(l)).Count());
var meanH = distances.Average();
var stdDevH = Math.Sqrt(distances.Sum(d => d * d) / distances.Count);
var stdErrorH = stdDevH / Math.Sqrt(distances.Count);
var marginOfErrorH = stdErrorH * 2;
Dispatcher.Invoke(() =>
{
SecondMeterLabel.Text = $"{maxDif.ToString("0.###")}m";
@ -190,7 +198,7 @@ namespace SampleApp.WinDesktop
var writeableBitmap = new WriteableBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Bgra32, null);
writeableBitmap.WritePixels(new Int32Rect(0, 0, width, height), pixels, stride, 0);
plot.Source = writeableBitmap;
Status.Text = $"Measurements: {locations.Count}\nAverage:\n - Latitude: {latAvr.ToString("0.0000000")}\n - Longitude: {lonAvr.ToString("0.0000000")}\n - Elevation: {zAvr.ToString("0.000")}m\nStandard Deviation:\n - Latitude: {stdDevLat.ToString("0.###")}m\n - Longitude: {stdDevLon.ToString("0.###")}m\n - Horizontal: {distances.Average().ToString("0.###")}m\n - Elevation: {stdDevZ.ToString("0.###")}m";
Status.Text = $"Measurements: {measurements.Length}\nAverage:\n - Latitude: {latAvr.ToString("0.0000000")}\n - Longitude: {lonAvr.ToString("0.0000000")}\n - Elevation: {zAvr.ToString("0.000")}m\nStandard Deviation:\n - Latitude: {stdDevLat.ToString("0.###")}m\n - Longitude: {stdDevLon.ToString("0.###")}m\n - Horizontal: {stdDevH.ToString("0.###")}m\n95% confidence: {marginOfErrorH.ToString("0.###")}m\n - Elevation: {stdDevZ.ToString("0.###")}m";
});
}