This study uses quantitative method with a comparative approach, by comparing the horizontal geometry accuracy of aero photo resulted by aerial photo processing without inputting GCP (direct georeferencing) and orthophoto aerial photo processing resulted by performing GCP (indirect georeferencing) input. The results of the horizontal geometry accuracy of the direct and indirect georeferencing methods, are then used to determine the class and the optimum scale that can be generated based on the class table for precision of land base maps regulate by the Regulation of the Minister of Agrarian Affairs / Head of the National Land Agency (Permen ATR / KaBPN) Number 21 Year 2019. Acquisition of aerial photography was carried out over an area of 110 hectares located in part of Pakem Binangun Village, part of Harjo Binangun Village and part of Umbulmartani Village by installing 8 points of pre marked GCP and 10 points of ICP (Independent Check Point) distributed evenly in the study area.
Based on the research results, horizontal geometry accuracy resulted by processing aerial photographs with indirect georeferencing method is better than the accuracy of horizontal geometry with the direct georeferencing method. The horizontal geometry accuracy value (CE90) for direct georeferencing method is 1.072 m and can be used for making land base maps with an optimal scale of 1: 2500 in class 2, while the horizontal geometry accuracy value (CE90) for direct georeferencing method is 0.246 m and can be used for making land base map with an optimal scale of 1:1000 in class 1. Although the indirect georeferencing method produces better horizontal geometry accuracy, the use of GPS-equipped UAV PPK methods without performing GCP input (direct georeferencing method) can be used by the Ministry of ATR / BPN to meet the availability of basic land maps on a medium scale.
Keywords: UAV PPK, Geo-Reference, Basic Land Maps
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|Nomor Panggil||001.4 Pra P|
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