private static async Task <float[]> retrieveRowElevationAsync([NotNull] IElevationProvider ep, double lat, double minLon, double lonRange)
{
if (ep == null)
{
throw new ArgumentNullException("ep");
}
var rowArray = new float[pixelWidthInt];
for (int cIdx = 0; cIdx < pixelWidthInt; cIdx++)
{
double lon = minLon + cIdx * lonRange / pixelWidthInt;
var elevation = await ep.GetElevationAsync(lat, lon);
rowArray[cIdx] = (float)elevation;
}
return(rowArray);
}
