title: Are north and west parameters in rasterio.transform.from_origin() in pixel space?
body: <p>I'm looking for some clarification on the use of the function
  <code>rasterio.transform.from_origin(west, north, xsize, ysize)</code>.</p>
  <p>I'm looking to re-project a tensor back into a coordinate system. It is unclear to me what units(lat/lon?) the north and west parameters of from_origin are! I used the lat/lon coordinates but the imagery was projected to the wrong location.</p>