<div dir="ltr"><div>In regards to the only transect example (<a href="https://www.ncl.ucar.edu/Applications/transect.shtml">https://www.ncl.ucar.edu/Applications/transect.shtml</a>), is there any reason we should doubht that the transect computed from gc_latlon:</div><div><br></div><div><pre style="color:rgb(0,0,0);word-wrap:break-word;white-space:pre-wrap"> dist = gc_latlon(leftlat,leftlon,rightlat,rightlon,npts,2)
</pre></div><div>is accurately depicted by:</div><div><pre style="color:rgb(0,0,0);word-wrap:break-word;white-space:pre-wrap"> map = gsn_csm_map_ce(wks,mres) ; create map</pre></div><div><pre style="color:rgb(0,0,0);word-wrap:break-word;white-space:pre-wrap"><pre style="word-wrap:break-word;white-space:pre-wrap"> gsn_polyline(wks,map,(/leftlon,rightlon/),(/leftlat,rightlat/),pres)</pre></pre></div>? I am not sure that gc_latlon and gsn_polyline (as portrayed on gsn_csm_map_ce, e.g. a global gridded dataset) use the same procedure to compute a transect, given identical input (rightlon, leftlon, etc...)<div><br></div><div>If the two procedures are not consistent, does anyone know a way to </div><div>(a) actually plot the transect from gc_latlon on a map (directly plot variable 'trans', in the example?), or <br></div><div>(b) compute a transect the same way that gsn_polyline and gsn_csm_map_ce do.</div><div><br></div><div>Thanks in advance!</div><div><br></div><div>Adam</div></div>