PurplePen.MapDisplay.BitmapTransform C# (CSharp) Method

        Matrix BitmapTransform()
        {
            // (worldcoord in mm) / 25.4F * dpi = pixels
            float scaleFactor = bitmapDpi / 25.4F;

            Matrix matrix = new Matrix();
            matrix.Translate(0, bitmap.PixelHeight);
            matrix.Scale(scaleFactor, -scaleFactor);
            matrix.Invert();
            return matrix;
        }