{"id":104956,"date":"2022-04-27T13:15:16","date_gmt":"2022-04-27T03:15:16","guid":{"rendered":"https:\/\/www.positionpartners.com.au\/uncategorized-id\/lidar-vs-photogrammetry\/"},"modified":"2024-03-28T17:23:33","modified_gmt":"2024-03-28T06:23:33","slug":"lidar-vs-photogrammetry","status":"publish","type":"post","link":"https:\/\/www.aptella.com\/id\/uncategorized-id\/lidar-vs-photogrammetry\/","title":{"rendered":"LiDAR vs Photogrammetry technology: which do you need?"},"content":{"rendered":"\t\t
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LiDAR imaging and\u00a0Photogrammetry: two sides of the same drone<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
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Drone surveying is an ever-changing landscape, largely because drones are versatile and therefore can be outfitted with new equipment all the time. New innovations, methods, and techniques often change the way geospatial professionals approach worksites and tasks, which can really keep you on your toes. The two most well-known types of drone surveying<\/a> utilise \u00a0LiDAR imaging or photogrammetry. Both have their own benefits and drawbacks, and their usefulness depends on the specific application. Not sure which one to pick? No problem, we\u2019ll walk you through your choices to help you decide what’s right for your project.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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The ins and outs of LiDAR imaging<\/span><\/h3>

LiDAR stands for \u201clight detection and ranging\u201d and is similar to radar technology. LiDAR imaging works by sending out laser pulses in the direction of a worksite or general surface, and then measuring the pulses reflected back through a LiDAR sensor. This method works on surfaces like trees, cliffs, and open ground. You\u2019re then able to calculate a series of distances based on multiple points of reflection, with which a point-based model or 3D map can be constructed – these are called LiDAR point clouds. Because LiDAR physically bounces lasers around in order to scan surface area, the data collected is quite vertically accurate. If you\u2019re scanning denser vegetation-filled areas, LiDAR beams can penetrate the empty space between these branches and, in some cases, through to the ground.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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Our other high-flying contestant, photogrammetry<\/span><\/h3>

Using photogrammetry for aerial mapping applications involves taking multiple images of a landscape in order to construct an overall 3D map of the terrain using a series of sequential images. This method allows for an accurate visual representation of the terrain for a lower price. High-definition cameras mounted to survey-grade drones<\/a> are one of the most effective ways to visualise a property or space. Because photogrammetry requires a less complex (and subsequently, potentially less expensive) payload in order to be carried out, you may find this method a little easier to wrap your head around. Photogrammetry is reliable, however in areas with higher levels of vegetation, it may be more difficult to get accurate ground level models when compared to LiDAR imaging. This is because the cameras can\u2019t see through to the ground, meaning they can\u2019t accurately gauge the lay of the land.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

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So, how photogrammetry differs from lidar? who does it better ?<\/span><\/h3>

The largest difference between our two aerial surveying systems is the way in which they gather data. Because Aptella offers multiple drones<\/a> for sale, it’s important to consider what you\u2019re going to need the drone to scan, and which system might be best-suited for the job. Both drone mapping systems can be used in a range of different circumstances, so we\u2019ve broken down what you\u2019ll need to consider:<\/p>