latitudeDiffPerPixel method

double latitudeDiffPerPixel(
  1. double latitude,
  2. double pixelDiff
)

Implementation

double latitudeDiffPerPixel(double latitude, double pixelDiff) {
  String key = "${latitude.round()}_$pixelDiff";
  double? result = _pixelDiffCache[key];
  if (result == null) {
    double pixelY = latitudeToPixelY(latitude);
    double latitude2 = pixelYToLatitude(pixelY - pixelDiff);
    result = (latitude2 - latitude).abs();
    _pixelDiffCache[key] = result;
  }
  return result;
}