手持式GPS在化探工作中的应用

主要论述在化探预查和普查阶段使用手持式GPS,实现了单点绝对定位,很大程度上提高了野外定点的精度,降低了工作强度,简化了工作程序,保证了工作质量。GPS在化探工作中的使用必须按照必要程序进行,为保证精度,必须进行GPS试验,主要包括控制点的选择,仪器参数校正,精度试验,多台GPS一致性检查,并明确给出该地区GPS能否使用报告。通过野外实例充分说明了利用手持式GPS的定位方法在地球化学勘查中应用的效果,利用GPS航迹跟踪功能验收当天野外工作,制作航迹监控图、野外实际材料图,利用GPS和MAPGIS制作地质简图及化探测网的布设。重点讨论了GPS有关参数的设定、校正及准确度等细节,从而保证地球化学勘查测点定点的精度和质量。

Study on the Application of Portable GPS in Geochemical Exploration

Portable GPS can position single point absolutely in the phase of pre-investigation and mineral prospecting, which can improve precision, reduce working intensity, and simplify work program. The portable GPS must be used according to＇the regulation and be tested in order to keep precision, including the control point choice, instrument parameter correction, precision test and consistency checking with different GPS equipments and then draw a conclusion of the GPS usage. The application effect in geochemical exploration is illustrated through field work examples. The GPS track can be used to check field work on the same day and draw the monitoring map and material map. Geology map can be d and survey grid can be layout by GPS and Mapgis. The assay discussed mainly about the details of th rameter setting, adjustment, accuracy and so on in order to ensure precision and quality of the rawn e pa- GPSapplication to positioning of survey.