Advantages of Using GPS for Surveying: A Comparison with Traditional Methods

Traditional surveying methods, such as triangulation and traverse, have long been relied upon for accurate land mapping. However, with the advent of GPS technology, a newer and often more efficient method has emerged. This article explores the advantages of GPS surveying, particularly when used by a licensed surveyor, compared to conventional methods like triangulation and traverse. We will also discuss the importance and accuracy of using lightweight tools and the impact of advanced techniques with Real Time Kinematic (RTK) and Ground Control Points (GCP).

Comparison with Traditional Methods

Traditionally, surveyors have used methods like triangulation and traverse to create maps and accurately place features on the land. These methods are time-consuming and require a significant amount of physical labor. In contrast, GPS surveying, when performed correctly by a licensed surveyor, can provide superior accuracy and efficiency.

Accuracy and Reliability

A typical handheld GPS unit is only accurate within a couple of meters, making it suitable for activities such as navigating or tracking pets, but not enough for legal standards. On the other hand, a GPS survey conducted by a licensed surveyor can achieve accuracy that surpasses traditional methods. This is especially true when using a drone equipped with a GPS unit that supports Real Time Kinematic (RTK) updates. RTK technology allows for centimeter-level accuracy by correcting the GPS signal in real-time, making it an invaluable tool for precision mapping.

Setup and Operation

The setup is crucial in achieving high accuracy in GPS surveys. A proper survey involves preparing the site with Ground Control Points (GCP), which are known reference points used to calibrate and align the collected data. With a correctly positioned and deployed GPS ground station, a properly set up drone survey can generate orthomosaic imagery where each pixel is precisely placed. This technique not only yields highly accurate maps but also allows for the integration of 3D models, providing a comprehensive representation of the survey area.

Tools and Technology

The use of lightweight tools, such as handheld GPS units and drones, offers a significant advantage over traditional methods. Drones equipped with GPS units can be deployed to capture high-resolution images from the air, significantly reducing the need for physical labor. Software applications like DroneDeploy play a crucial role in setting up the mission, processing the collected data, and generating reliable orthomosaic images. This technology enables surveyors to collect data more efficiently and accurately, ensuring that every feature on the site is accurately placed.

Legal and Practical Benefits

While traditional methods can provide accurate borders and a general understanding of site features, the level of detail and precision offered by GPS surveying is unparalleled. A licensed surveyor using GPS technology can create detailed and precise maps that are acceptable in legal contexts, such as property deeds and disputes. The use of GPS surveying ensures that every feature on the site is accurately represented, making it an invaluable tool for surveyors and legal professionals.

Conclusion

The advantages of using GPS for surveying are clear. From improved accuracy to increased efficiency, GPS technology offers solutions that surpass traditional methods. For surveyors and professionals in related fields, embracing GPS technology can lead to more precise and reliable surveys. Whether it's using a handheld GPS unit or deploying drones equipped with advanced GPS capabilities, GPS surveying is a powerful tool that should not be overlooked.

Keywords: GPS surveying, traditional surveying methods, precision mapping