摘要
导航型手持GPS目前在中小比例地质调查等领域得到广泛应用,由于坐标系之间存在差异,在实际应用过程中,必须将手持机的WGS84坐标系转换为我国应用的BJ54或西安80坐标系。坐标转换的准确与否,直接影响到工程测量定位的精度,传统的坐标转换计算所需要的起算资料不易收集,计算过程过于繁琐,非专业人员难以掌握。本文根据收集的三角点BJ54坐标(或西安80坐标),和现场测定的过渡坐标,求出各参数在本工作地区的变化率,建立参数方程,反向求出适合于当地的各项改正参数,方法简便易行,为手持GPS定位的坐标转换方法提出一种新的思路。
Navigation-type palmtop GPS has been widely applied in geological surveying at small scale. When it is used in geological surveying, the WGS84 system of palmtop GPS has to be conversed into BJ54 or Xi＇an 80 systems that are used in China, since the screpan cies in different coordinate systems. The precision of coordinate conversion would directly impact the location of engineering survey. Acquisition of begins reckoning materials required for conversion calculation of traditional coordinates is not easy and the process of calculation is complicated and hard to be used by nonprofessionals. The trigonometric BJ45 coordinates （or the Xi＇ an coordinates） and measured transitional coordinates can be used to reckon the variations of each parameter in this area, to create a parameter equation and reversely calculate the corected parameters in locality. The method is simple and convenient, which is new in conversion of mensurated coordinates by palmtop GPS.
出处
《陕西地质》
2007年第1期96-102,共7页
Geology of Shaanxi
