private float MercX(float lon)
{
lon = (float)ExtensionClass.DegreeToRadian(lon);
float a = (256 / (float)Math.PI) * (float)Math.Pow(2, Zoom);
float b = lon + (float)Math.PI;
return(a * b);
}
private float MercY(float lat)
{
lat = (float)ExtensionClass.DegreeToRadian(lat);
var a = (256 / (float)Math.PI) * (float)Math.Pow(2, Zoom);
var b = (float)Math.Tan(Math.PI / 4 + lat / 2);
var c = (float)Math.PI - (float)Math.Log(b);
return(a * c);
}
private void FindEarthQuakes()
{
float cx = MercX(Clon);
float cy = MercY(Clat);
var earthquakes = new List <CSVCells>();
switch (_periodChooser)
{
case "Important":
earthquakes = _csvParser.SplitCSVFile("https://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/significant_month.csv");
break;
case "Last day":
earthquakes = _csvParser.SplitCSVFile("http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_day.csv");
break;
case "Last week":
earthquakes = _csvParser.SplitCSVFile("http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_week.csv");
break;
case "Last month":
earthquakes = _csvParser.SplitCSVFile("http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_month.csv");
break;
default:
earthquakes = _csvParser.SplitCSVFile("http://earthquake.usgs.gov/earthquakes/feed/v1.0/summary/all_day.csv");
break;
}
earthQ.Clear();
foreach (var eq in earthquakes)
{
using (var g = pictureBox1.CreateGraphics())
{
try
{
float x = MercX(eq.Longitude) - cx;
float y = MercY(eq.Latitude) - cy;
earthQ.Add(new CSVCells(eq.Place, new Point((int)x, (int)y), eq.Updated, eq.Magnitude, eq.Type));
float mag = (float)Math.Pow(10, eq.Magnitude);
mag = (float)Math.Sqrt(mag);
float magmax = (float)Math.Sqrt(Math.Pow(10, 10));
float d = ExtensionClass.Map(mag, 0, magmax, 1, 500);
g.TranslateTransform(pictureBox1.ClientSize.Width / 2 - (d / 2),
pictureBox1.ClientSize.Height / 2 - (d / 2));
g.FillEllipse(eq.Magnitude < 5 ? Brushes.Magenta : Brushes.Red, x, y, d, d);
g.Dispose();
}
catch (Exception)
{
}
}
}
//Changing the label's text in a cross thread
label1.Invoke(new Action(() =>
{
if (_periodChooser.Contains("Important"))
{
label1.Location = new Point(680, 441);
label1.Text = $@"Done. In the last month there were {earthquakes.Count} important earthquakes.";
}
else
{
label1.Text = $@"Done. There were {earthquakes.Count} earthquakes in the{_periodChooser.ToLower()}";
label1.Location = new Point(710, 441);
}
}));
_earthQ.Abort();
}