Because CAD packages represent drawings in non-earth coordinates, all drawings imported or exported between MapInfo Pro and CAD suffer some distortion. This comes from trying to display non-earth information on a spherical coordinate system (like the globe). Coordinate conversions are used to assign longitude/latitude coordinates to CAD drawings that were created using non-earth coordinates. Conversions near the equator are more exact than conversions at the extremes of the hemispheres. To minimize distortion, import and export with no coordinate conversions and avoid translating maps that cover large areas.