o
                 latitudinal coordinates. Convert radians
                 to degrees.
                 ./
                 <a href="reclat_c.html">reclat_c</a> ( spoint, &amp;radius, &amp;lon, &amp;lat );

                 lon *= <a href="dpr_c.html">dpr_c</a>(); 
                 lat *= <a href="dpr_c.html">dpr_c</a>();

                 printf( &quot;Boundary vector surface intercept coordinates &quot;
                         &quot;using SURFPT:\n&quot;
                         &quot;    Radius    (km