进行中桩高程测量时,测控制桩尺子应立在地面,测中线桩尺子应立在桩顶。()
从海图上查得GPS船位修正的说明中有"Latitude1.’0Southward.Longitude0.’2Westward"字样。GPS的经、纬度读数为:33°40.’2N,10°12.’5E。则用于海图上定位的数据应为:
A. 33°40.’2N,10°12.’5E
B. 33°39.’2N,10°12.’3E
C. 33°40.’2N,10°12.’3E
D. 33°39.’0N,10°12.’7E
从海图上查得GPS船位修正的说明中有"Latitude1.’1Southward.Longitude0.’4Westward"字样。GPS的经、纬度读数为:30°40.’2S,15°12.’5W.则用于海图上定位的数据应为:
A. 30°41.’3S,15°12.’9W
B. 30°41.’2S,15°12.’7W
C. 30°39.’2S,15°12.’3W
D. 30°40.’0S,15°11.’5W