TESTING THE QUALITY OF THE ORTHOFOTO DMC III LARGE FORMAT CAMERA AERIAL PHOTOGRAPHY FOR BASE MAP ACCURACY SCALE 1:5000

Abstract

This study discusses the quality testing of the DMC III LFAP camera for base map accuracy at a
scale of 1:5000. The objectives of this research are to analyze the resolution quality of DMC III LFAP
orthophoto images and to assess the geometric accuracy of DMC III LFAP orthomosaics based on
Independent Check Points (ICP) measured in the field.This research employs both qualitative and
quantitative methods. The study focuses on two main aspects: the resolution quality of orthophoto images
and geometric accuracy based on ICP measurements. The research data includes DMC III aerial
photographs from 2021 and field ICP observations. The methods used in this study involve orthophoto
processing, ICP measurements using Geodetic GPS, and geometric accuracy analysis with the Root Mean
Square Error (RMSE) method. Accuracy evaluation is conducted by comparing orthophoto coordinates
with field observations.The results indicate that the resolution of the generated orthophoto images meets
the quality standards for a scale of 1:5000 based on Per BIG Number 1 of 2020, with a reliable level of
accuracy. However, geometric accuracy testing shows that the orthomosaic results have an error level
exceeding the tolerance limits set by Per BIG Number 6 of 2018, making them unsuitable for base map
accuracy at a scale of 1:5000.