應用e-GNSS檢核地籍圖重測區加密控制測量精度分析之研究

The Precision Checking Research of Densified Control and Supplementary Control Point Surveying in Cadastral Resurvey by e-GNSS

TTG（Trimble Transformation Generator）坐標轉換平台模組本身具備參數轉換功能，讓使用者於e-GNSS（Electronic Global Navigation Satellite System）即時動態定位系統施測定位同時，配合TTG即可即時獲得高精度坐標成果。本文透過不同實驗區之作業，利用e-GNSS及TTG三維坐標轉換平台獲得成果，應用於地籍圖重測區辦理加密控制測量與圖根測量，希望達到提升工作效率、降低作業成本之目的。本文研究結果歸納如下：（1）以TTG在測回時間間隔無限制，施測2測回，每測回紀錄180筆固定解之加密控制測量成果，在檢核已知點、新設加密控制點及地面觀測檢查項目中，可符作業規定之比率，平均介於95.24%至100%。（2）以TTG在測回時間間隔無限制下，施測2測回，每測回紀錄30筆固定解之圖根測量成果，在水平距離檢核及地面觀測檢查項目中，可符合作業規定之比率，平均介於93.24%至98.35%。如以地籍圖重測成果檢查作業須知RTK對圖根點位置檢核不超過0.03m之規定，則平均符合比率介於98.05%~99.43%。（3）結合二者之測量技術，應用於加密控制測量與圖根測量，較傳統作業方法更具效率，可大量縮短觀測時間及節省人力，即加密控制測量及圖根測量點位觀測時間，分別由原本100分鐘與66分鐘，各自縮短至6分鐘與1分鐘。 TTG (Trimble Transformation Generator) modules have parameter transformation functions. With TTG, using e-GNSS(Electronic Global Navigation Satellite System) measurement in order to real-time access high-precision coordinate values. Through different areas of works, the technologies which integrated e-GNSS with TTG modules could be used to densified control and Supplementary control point surveying on cadastral resurvey areas. Hope it can be reached the goals of improving efficiency and reducing operation costs. The results of those studies are summarized as follow: (1) Two sets of TTG survey were applied without restriction of time interval and 180 fixed observations were recorded for each set. For known-point check, new densified control point check, and field survey check, the qualified ration of the obtained results are between 95.24% and 100%. (2) Two sets of TTG survey were applied without restriction of time interval and 30 fixed observations were recorded for each set. For horizontal distance check and field survey check, the qualified ratio of the obtained results are between 93.24% and 98.35%. And the average qualified ratio is 98.05%~99.43% for the requirement of the Cadastral maps retest results of inspection operations Notice, in which the requirement for the position difference of supplementary control point using RTK is less than 0.03 m. (3) The technologies which integrated e-GNSS with TTG modules could be used to densified control and Supplementary control point surveying on cadastral resurvey areas. It can be more efficient than and less times and labors than traditional methods. While points of observation time of Densified Control and Supplementary control point surveying respectively, from the original 100 and 66 minutes, shortened to 6 minutes and 1 minute.

TTG (Trimble Transformation Generator) modules have parameter transformation functions. With TTG, using e-GNSS(Electronic Global Navigation Satellite System) measurement in order to real-time access high-precision coordinate values. Through different areas of works, the technologies which integrated e-GNSS with TTG modules could be used to densified control and Supplementary control point surveying on cadastral resurvey areas. Hope it can be reached the goals of improving efficiency and reducing operation costs. The results of those studies are summarized as follow: (1) Two sets of TTG survey were applied without restriction of time interval and 180 fixed observations were recorded for each set. For known-point check, new densified control point check, and field survey check, the qualified ration of the obtained results are between 95.24% and 100%. (2) Two sets of TTG survey were applied without restriction of time interval and 30 fixed observations were recorded for each set. For horizontal distance check and field survey check, the qualified ratio of the obtained results are between 93.24% and 98.35%. And the average qualified ratio is 98.05%~99.43% for the requirement of the Cadastral maps retest results of inspection operations Notice, in which the requirement for the position difference of supplementary control point using RTK is less than 0.03 m. (3) The technologies which integrated e-GNSS with TTG modules could be used to densified control and Supplementary control point surveying on cadastral resurvey areas. It can be more efficient than and less times and labors than traditional methods. While points of observation time of Densified Control and Supplementary control point surveying respectively, from the original 100 and 66 minutes, shortened to 6 minutes and 1 minute.