Summarization By: Ishaan Chaturvedi
Introduction:
Surveying the land involves measuring distances and angles on the Earth's surface to create maps and identify boundaries. Traditionally, this job required sophisticated tools like total stations and GNSS (a fancy GPS system) and a team of experts. Recently, Apple introduced a LiDAR sensor in the iPhone 13 Pro Max, a tool that can see and measure the world in 3D. This study checks if this smartphone can do the heavy lifting for land surveying just as well as the traditional tools.
Literature Review:
Before this study, people knew iPhones with LiDAR could make 3D maps and help in photography, especially in the dark. Other researchers have tried iPhones for surveying buildings and comparing the results with traditional methods. They found that iPhones could get pretty close to the accuracy of professional equipment. This research builds on those findings by specifically looking at how well the iPhone 13 Pro Max's LiDAR sensor measures up in detailed land surveying.
Study Area:
The researchers chose a parking lot next to UiTM Shah Alam Stadium, measuring 35m by 25m, as their outdoor laboratory. They were keen on understanding how well the iPhone's LiDAR sensor could capture the various features of this space, like buildings, roads, and drainage, compared to a total station.
Methodology:
The process was split into five steps: setting up, collecting data with both traditional and iPhone LiDAR methods, processing the data, and finally comparing them. For the iPhone data collection, they used an app called PIX4DCatch and analyzed the data with Cloud Compare software.
Result and Analysis:
After comparing the collected data, the researchers found that the iPhone's measurements were impressively close to those from the traditional methods. Whether they measured the location of control points, the edges of buildings, or the area of structures, the iPhone's data was only slightly off. For example, when measuring building edges, the largest difference noted was only a few centimeters.
Sample Data from the paper:
Conclusion:
The iPhone 13 Pro Max, with its LiDAR sensor, showed great promise as a surveying tool for small areas. It's not perfect and factors like lighting and weather can affect its accuracy. Still, for many tasks, it could offer a quicker, cheaper way to get reliable measurements. This finding could be very useful for professionals in fields like architecture, engineering, and land surveying.
Acknowledgments and References:
The research team thanks everyone who contributed to this study, especially the technical support from the Centre of Studies for Surveying Science and Geomatics at UiTM. They also appreciate the support from Salur Kuasa Sdn Bhd.
Paper Citation (APA)
Hakim, N. A., Razali, R., Said, M., Muhamad, Rahim, A., & Mokhtar. (2023). Accuracy assessment on detail survey plan using iPhone 13 Pro Max Lidar Sensor. International Journal of Geoinformatics, 79–86. https://doi.org/10.52939/ijg.v19i5.2665
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