由於移動式製圖平台的興起，現行多平台製圖系統多利用INS/GNSS整合系統以直接地理定位的方式取得影像之方位元素，然直接地理定位精度受INS/GNSS整合系統誤差影響極大，整合系統之定位誤差是線性傳播至直接地理定位誤差上，因此提高INS/GNSS整合系統之定位精度即成為提高移動式製圖系統之首要目標。
本研究為測試現行的衛星動態定位解算方法對於INS/GNSS整合系統定位定向誤差之影響，利用INS/GNSS整合系統之原始資料進行傳統單主站差分 (DGNSS)、精密單點定位 (PPP)及搭配後處理之虛擬主站技術 (VRS)之軌跡測試，成果顯示基於VRS為衛星定位解算方法之INS/GNSS整合系統定位精度較高。
目前國內網路化RTK (NRTK)之發展亦漸趨成熟，內政部國土測繪中心建置有基於VRS技術之e-GPS衛星基準網，民間亦架設有Civil NET，利用後處理VRS做為系統之定位解算方法可免於耗費傳統差分須另外架設主站之人力成本，且仍可保有高精度以符移動製圖系統之需求。

Recently the useage of mobile mapping platform have been raised gradually in Taiwan. Currently mobile mapping technologies always apply INS/GNSS integrated system to get exterior orientation of image by Direct Georeferencing (DG). But the accuracy of DG is affected significantly by the accuracy of INS/GNSS integrated system because the error propagation from INS/GNSS integrated system to DG is linear. So the primary objective to increase the accuracy of mobile mapping system is to enhance the accuracy of INS/GNSS integrated system.
This research investigates the impact different kinematic satellite positioning method on the positioning and orientation accuracy of an INS/GNSS integrated system. It uses raw measurements of INS/GNSS integrated system to perform three satellite positioning processes, including Differential GNSS (DGNSS), Precise Point Positioning (PPP) and post-processed Virtual Reference Station (VRS). The result shows the accuracy of using VRS in INS/GNSS integrated system satellite positioning is superior compared to other methods.
Now the development of Network RTK (Network Real Time Kinematic, NRTK) in Taiwan is gradually becomimg mature. National Land Surveying and Mapping Center established e-GPS based on VRS and the provate company also set up a similar system known as Civil NET. Using post-processed VRS to do satellite positioning can save the cost of manpower which is needed in traditional DGNSS and still remain the accuracy which is needed in mobile mapping system.

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