Ok. Thanks. But when I use the following:
settings.Density = new MagickGeometry(3000,0);
MagickImage magickImage1 = new MagickImage(sourceFilePath, settings);
the size turns out to be 12359 x 3346. I can then resize it back down and it looks fine. Is the trick to simply read it at a higher density and then resize it back down to what I want(3000 x 812). Or is there a way to read the file where the actual size is what I want so I don't have to resize it?