![]() The checkpoint location error is the difference between the checkpoint location as measured by your precision GPS device and the correction checkpoint location that is calculated during map processing. The only way to verify the relative and absolute accuracy of your map is to use checkpoints in processing. How Can I Find My Accuracy Information? Checkpoints If the map shows the South Pole 2 feet to the left of where it should be, then the absolute accuracy of that point is within 2 feet. In our giant map of Antarctica example, the absolute accuracy of the location of the South Pole is the difference between where it is on our map and where the real South Pole. when comparing to geo-referenced design documents for a construction project or conducting property boundary surveys. This is important when you need a high degree of confidence that the lat/long and elevation measurements of each point on the map are correct when comparing with the real world, e.g. If a map has a high level of global accuracy, the latitude and longitude of a point on that map will correspond fairly accurately with actual GPS coordinates. Absolute (or Global) AccuracyĪbsolute accuracy, on the other hand, is the degree to which the calculated position of a point on a map corresponds to its actual position in a fixed coordinate system in the real world. Say that distance is really 300 miles and we measured it as 300 miles and 20 feet, the relative accuracy of the shortest distance between the South Pole and the ocean would be within 20 feet. This is an important measure for length, area, and volume.įor example, if we created a giant map of Antarctica and wanted to measure the shortest distance from the South Pole to the Arctic Ocean we would need high relative accuracy in our map, meaning the size and shape of Antarctica are correct so we find and measure the shortest distance. When asking questions like: "How long is this fence?", "What's the area of this field?" or "What is the volume of this stockpile?", it doesn't really matter where the map/model is in the world, as long as the map/model is consistent with itself. This is the accuracy of a point on the map relative to other points within the map/model. There are two ways to think about accuracy: Relative (or Local) Accuracy Need extra assistance? Watch our webinar, "Ask the Experts LIVE.Learn about the difference between relative and absolute accuracy and the best practice to increase the final accuracy of your map What Do You Mean By "Accuracy"? We often see our customers adding these to their LinkedIn profiles or sharing across their social media accounts, and if interested in doing the same, tag us in your photos. Please note that these are significantly longer than the free Academy courses and do not provide the actual certification, but act more as supplemental studying material.Īfter completing each series, you’ll receive a certificate of your proficiency in the subject. While not a specific Academy course, DroneDeploy also offers trainings in partnership with Remote Pilot 101 for those interested in earning or renewing their Part 107 license. As in the Earthworks course, we’ve also included two free webinars for extra information on real use cases and strategies for scaling your drone program within agriculture. Photogrammetry, remote vegetation sensing, and crop health analysis are all discussed in this course. Learn from Kyle Miller, our Enterprise Sales Engineer with previous experience on his family’s farm, to make the best use of DroneDeploy’s features tailored particularly to agriculture. Farmers are some of the fastest adopters of drone technology, and this course was designed with this in mind.
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