public async static Task <Bitmap> GetHeatMap(List <MeteorBase> data)
{
Bitmap bitmapImage;
try
{
var requesParams = new HeatMapArgs()
{
Data = data,
Zoom = 1,
};
string target = CreateUrl(requesParams);
using (var response = await client.GetAsync(target))
{
response.EnsureSuccessStatusCode();
using (Stream stream = await response.Content.ReadAsStreamAsync())
{
bitmapImage = new Bitmap(stream);
}
}
return(bitmapImage);
}
catch
{
throw;
}
}
private static string CreateUrl(HeatMapArgs args)
{
string baseUrl = "https://image.maps.api.here.com/mia/1.6/heat?";
string credentialParameters = $"app_id={Credentials.AppId}&app_code={Credentials.AppCode}";
string otherParams = $"&z={args.Zoom}&h={args.Height}&w={args.Width}&op={args.Opacity}";
string dataPoints = "";
for (int i = 0; i < System.Math.Min(args.Data.Count, args.MaxDataCount); ++i)
{
dataPoints += $"&a{i}={args.Data[i].PositionRaw}&rad{i}={args.Rad}&l{i}=1";
}
return(baseUrl + credentialParameters + otherParams + dataPoints);
}