question: public void addLonLine ( double minLat , double maxLat , double lon ) { String name = "lonline" + nextShape ; nextShape ++ ; b . append ( "        var " + name + " = WE.polygon([\n" ) ; double lat ; int steps = getStepCount ( minLat , lon , maxLat , lon ) ; for ( lat = minLat ; lat <= maxLat ; lat += ( maxLat - minLat ) / steps ) { b . append ( "          [" + lat + ", " + lon + "],\n" ) ; } b . append ( "          [" + maxLat + ", " + lon + "],\n" ) ; lat -= ( maxLat - minLat ) / 36 ; for ( ; lat >= minLat ; lat -= ( maxLat - minLat ) / steps ) { b . append ( "          [" + lat + ", " + lon + "],\n" ) ; } b . append ( "        ], {color: \"#ff0000\", fillColor: \"#ffffff\", opacity: 1, fillOpacity: 0.0001});\n" ) ; b . append ( "        " + name + ".addTo(earth);\n" ) ; }
target:  Draws a line a fixed longitude, spanning the min/max latitude 