LonLat 坐标转换

命令：
cs2cs +proj=latlong +datum=WGS84 +to +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=y_0=0 +k=1.0 +units=m +no_defs < infile > outfile

将infile 里面包含的(lat, lat)坐标转换成900913的格式
in:
113.2046 23.0210
113.4550 23.2346

out:
12601878.43 2634558.43 0.00
12629752.83 2660414.30 0.00


到过来呢：
cs2cs +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=y_0=0 +k=1.0 +units=m +no_defs +to +proj=latlong +datum=WGS84 < infile > outfile
in:
12601878.43 2634558.43 0.00
12629752.83 2660414.30 0.00


out:
113d12'16.56"E 23d1'15.6"N 0.000
113d27'18"E 23d14'4.56"N 0.000