drawparallels

経線を描くのは，drawmeridians．

軸ラベル無しで，緯線だけ描くには

map.drawparallels(np.arange(-90.,91.,30.))

線無しで，軸ラベルだけを書くには

map.drawparallels(np.arange(-90.,91.,30.),labels=[1,0,0,0],fontsize=10,linewidth=0.0)

drawparallels は，緯線とそれに対応する軸ラベル（経度の数値）を描く．

Drawparallels draws lines across longitudes at specific latitudes and corresponding axis labels (numerical values of longitude).

You can draw only the axis labels, without lines by

map.drawparallels(np.arange(-90.,91.,30.),labels=[1,0,0,0],fontsize=10,linewidth=0.0)

You can draw only lines, without the axis labels by

Map.drawparallels (np.arange (-90., 91., 30.))

"drawmeridians" function draws the meridians.