{"id":4915,"date":"2019-08-07T07:24:49","date_gmt":"2019-08-07T07:24:49","guid":{"rendered":"http:\/\/bestdroneforthejob.com\/?p=4915"},"modified":"2019-09-04T02:10:35","modified_gmt":"2019-09-04T02:10:35","slug":"drone-lidar-vs-drone-photogrammetry-when-to-use-each","status":"publish","type":"post","link":"https:\/\/bestdroneforthejob.com\/blog\/drone-lidar-vs-drone-photogrammetry-when-to-use-each\/","title":{"rendered":"Drone LIDAR vs. Drone Photogrammetry: When To Use Each"},"content":{"rendered":"<p>Drones are increasingly being utilized for tasks that were previously performed using manned aircraft such as surveying, mapping, and 3D modeling.<\/p>\n<p><strong>The two main technologies used in these areas are LIDAR and photogrammetry.<\/strong><\/p>\n<p>Although both are useful to surveyors, each has its pros and cons. To better analyze the similarities and differences of both these, it\u2019s important to understand how they work.<\/p>\n<hr>\n<h2><strong>How LIDAR and photogrammetry work<\/strong><\/h2>\n<figure id=\"attachment_728\" aria-describedby=\"caption-attachment-728\" style=\"width: 500px\" class=\"wp-caption alignnone\"><a href=\"http:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/09\/Agriculture-Drone-Buyers-Guide-LIDAR-imaging.jpeg\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-728\" src=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/09\/Agriculture-Drone-Buyers-Guide-LIDAR-imaging.jpeg\" alt=\"LIDAR imaging\" width=\"500\" height=\"237\" srcset=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/09\/Agriculture-Drone-Buyers-Guide-LIDAR-imaging.jpeg 634w, https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/09\/Agriculture-Drone-Buyers-Guide-LIDAR-imaging-510x241.jpeg 510w, https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/09\/Agriculture-Drone-Buyers-Guide-LIDAR-imaging-50x24.jpeg 50w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><figcaption id=\"caption-attachment-728\" class=\"wp-caption-text\">LIDAR imaging<\/figcaption><\/figure>\n<p><strong>LIDAR (light detection and ranging) is a decades-old technology which uses light in surveying.<\/strong> Once laser light illuminates a target, it\u2019s reflected, and the distance measured using sensors.<\/p>\n<p>Variations in wavelengths and laser return times are then used in making 3D models of the target.<\/p>\n<p><strong>LIDAR has <a href=\"https:\/\/www.forbes.com\/sites\/meriameberboucha\/2019\/02\/26\/5-facts-about-lidar\/#5926286df87b\" target=\"_blank\" rel=\"noopener\">applications in diverse fields<\/a> such as seismology, forestry, geography, geology, archaeology, and self-driving cars.<\/strong><\/p>\n<p>Photogrammetry stitches several photos together to create a 3D model of the site.<\/p>\n<p>For it to work accurately, it requires at least 80% overlap on every picture.<\/p>\n<p>This not only allows the processing software to create an accurate <a href=\"https:\/\/www.photomapping.com.au\/digital-orthophoto\" target=\"_blank\" rel=\"noopener\">orthophoto<\/a>&nbsp;but also provides numerous angles for 3D modeling.<\/p>\n<hr>\n<h2><strong>When to Use Each Technology<\/strong><\/h2>\n<p><a href=\"http:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2019\/08\/photogrammetry.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-4921\" src=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2019\/08\/photogrammetry.jpg\" alt=\"photogrammetry\" width=\"407\" height=\"281\"><\/a><\/p>\n<p><strong>LIDAR is useful if you want a more in-depth assessment of an area.<\/strong><\/p>\n<p>Its sensors can penetrate dense vegetation as well as other structures, which gives surveyors a better idea of what lies beneath.<\/p>\n<p>This makes it more suitable for surveying rough or largely uninhabited terrain.<\/p>\n<p>The data gathered by LIDAR sensors create extremely useful 3D point cloud terrain models.<\/p>\n<p><strong>This technology applies to land surveying, power line inspections, mining, <a href=\"http:\/\/lidarradar.com\/apps\/15-lidar-applications-in-agriculture\" target=\"_blank\" rel=\"noopener\">precision agriculture<\/a>, and forestry.<\/strong><\/p>\n<p>In commercial agriculture, LIDAR sensors can evaluate soil erosion, map water catchment areas, and precisely tell which parts need fertilizer.<\/p>\n<p>Since photogrammetry stitches thousands of 2D photos together to create 3D models, it only captures surface data. It\u2019s therefore useful when you want a visual overview of a target.<\/p>\n<p>Applications include construction, sports, real estate, forensics and entertainment industries.<\/p>\n<hr>\n<h2><strong>Main Similarities<\/strong><\/h2>\n<p><a href=\"http:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2019\/08\/TerraScan.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-4922\" src=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2019\/08\/TerraScan.jpg\" alt=\"TerraScan\" width=\"224\" height=\"111\"><\/a><\/p>\n<p>Both technologies are useful in 3d modeling and terrain mapping.<\/p>\n<p>LIDAR is generally more expensive, but they both survey large swathes of terrain faster and more affordably than manned aircraft.<\/p>\n<p><strong>They both also depend on similar components and add-ons for improved productivity. These include RTK, GCPs, and GPS correction techniques.<\/strong><\/p>\n<p>Although photogrammetry is more dependent on software for processing, solutions such as <a href=\"http:\/\/www.terrasolid.com\" target=\"_blank\" rel=\"noopener\">Terrascan<\/a> are available for LIDAR based output.<\/p>\n<hr>\n<h2><strong>Key Differences<\/strong><\/h2>\n<p><a href=\"http:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2019\/08\/Holy-Stone-HS-100.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-4923\" src=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2019\/08\/Holy-Stone-HS-100.jpg\" alt=\"Holy Stone HS-100\" width=\"463\" height=\"445\"><\/a><\/p>\n<p>One major difference concerns data acquisition.<\/p>\n<p>Since LIDAR uses laser technology, it can conduct surveys at any time, even under cover of darkness.<\/p>\n<p>Photogrammetry, on the other hand, works best during the daytime when there\u2019s enough light.<\/p>\n<p><strong>Other differences are:<\/strong><\/p>\n<ul>\n<li>\n<h3><strong>Data collection<\/strong><\/h3>\n<\/li>\n<\/ul>\n<p>LIDAR acquires data faster than photogrammetry, due to its threshold for accuracy being lower. It only needs a flight line overlap of 20-30% to process data accurately, while photogrammetry requires an image overlap rate of 60-90%.<\/p>\n<ul>\n<li>\n<h3><strong>Application<\/strong><\/h3>\n<\/li>\n<\/ul>\n<p>Photogrammetry is more suitable for detailed visual assessments. It\u2019s increasingly being adopted in commercial agriculture.<\/p>\n<p>Some of the <a href=\"https:\/\/bestdroneforthejob.com\/drones-for-work\/agriculture-drone-buyers-guide\/\" target=\"_blank\" rel=\"noopener\">best ag drones in the market today<\/a> are equipped with this technology. Their color capable (RGB) cameras make 3D modeling more detailed compared to LIDAR\u2019S monochrome output.<\/p>\n<ul>\n<li>\n<h3><strong>Data processing speed<\/strong><\/h3>\n<\/li>\n<\/ul>\n<p>LIDAR processes data faster. To generate the final product, you only need 5 to 30 minutes of calibration, depending on how complex the survey is.<\/p>\n<p>Data processing in photogrammetry is the most time-consuming part. It lasts 5 to 10 times longer than data acquisition and requires powerful computing resources to do so.<\/p>\n<ul>\n<li>\n<h3><strong>Cost<\/strong><\/h3>\n<\/li>\n<\/ul>\n<p>Although UAV-mounted LIDAR sensors are becoming more affordable, they\u2019re still relatively expensive. Their current price ranges from $50,000 to $300,000, which is out of reach for some small businesses.<\/p>\n<p>By comparison, photogrammetry is very affordable. You only need a UAV with a compatible camera and processing software. <strong>These drones include DJI Phantom 4, Holy Stone HS-100, and Parrot Bebop 2. Their prices range from $250 to $1200.<\/strong><\/p>\n<p>Alternatively, you can purchase cameras that support the technology and mount them to any compatible drone. Examples include the GoPro Hero 4 Silver, Sony A7 Series, and Hasselblad X1D.<\/p>\n<ul>\n<li>\n<h3><strong>Accuracy<\/strong><\/h3>\n<\/li>\n<\/ul>\n<p>LIDAR is preferred by surveyors for its high accuracy, especially when utilizing ground-based sensors.<\/p>\n<p>Achieving the same with a UAV-mounted sensor is harder because it\u2019s in motion.<\/p>\n<p><strong>Other technologies such as GNSS receivers and IMU (inertial motion unit) are used for improved accuracy.<\/strong><\/p>\n<p>Photogrammetry can also be highly accurate, though this depends on various factors.<\/p>\n<p>One of them is exceptional surveying experience on the drone pilot\u2019s part. This makes it easier to select the best hardware, appropriate flight parameters, and data processing software.&nbsp;<\/p>\n<hr>\n<h2><strong>Conclusion<\/strong><\/h2>\n<p><a href=\"http:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/06\/drone-flying-over-field.jpeg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-231\" src=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/06\/drone-flying-over-field.jpeg\" alt=\"drone flying over field\" width=\"500\" height=\"381\" srcset=\"https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/06\/drone-flying-over-field.jpeg 562w, https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/06\/drone-flying-over-field-510x388.jpeg 510w, https:\/\/bestdroneforthejob.com\/wp-content\/uploads\/2015\/06\/drone-flying-over-field-50x38.jpeg 50w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/a><\/p>\n<p>The biggest determinant on when to use either of these technologies is the target you\u2019re surveying. If it contains useful subterranean data, you\u2019ll naturally pick LIDAR, while photogrammetry works best for visual surveys.<\/p>\n<p><strong>As investments in UAS research and development increase, these solutions are bound to become faster, more affordable, and more accurate.<\/strong><\/p>\n<hr>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Drones are increasingly being utilized for tasks that were previously performed using manned aircraft such as surveying, mapping, and 3D modeling. The two main technologies used in these areas are LIDAR and photogrammetry. Although both are useful to surveyors, each has its pros and cons. To better analyze the similarities and differences of both these, [&#8230;]\n","protected":false},"author":1,"featured_media":4927,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[252],"tags":[308,310,306,309,305,307],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.8.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Drone LIDAR vs. Drone Photogrammetry: When To Use Each<\/title>\n<meta name=\"description\" content=\"LIDAR &amp; photogrammetry are the two main technologies used by drones in areas like surveying, mapping and 3D modelling. 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