TLG Dan Inloes

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  1. I agree that it would make a slight difference. Very slight. Keep in mind that most photogrammetry software packages calculates an error percentage when calculating volumes. I've never seen an error accuracy greater than ±3% from pix4d and I've done about a dozen stock piles. Its very common to see a surveyor note ±10% on volume calculations on stock piles, especially big, illformed piles when they're collecting data with a GPS system, which is most common. Unless your using a laser scanner, photogrammetric methods derive a more accurate data set then the means a typical surveyor would employ.
  2. Hey Mike, My thoughts on this is that if you're needing ground control to get more accurate data, you'd be working with a surveyor which will be setting GCP's for you with his survey equipment. The internal accuracy's of the data is already very accurate in relation to itself. If you introduce GCP's to the project, you then introduce real world coordinates. If you're working in real world coordinates, the likelihood that your data will then be used to "measure" stuff goes way up. The fact that your data has been corrected to reflect georeferenced ground coordinates is enough to be consid
  3. Clients: @Av8Chuck brings me to my next point. As I've said above, this will vary from state to state, but my general rule for drone businesses is that you have two client audiences: Those that are surveyors and every body else. In some states, it could be surveyors, engineers and everyone else, but you get the picture. If your data falls under the category of land surveying or engineering, meaning that the work is blanked under work that requires civil standards, your working for a surveyor or an engineer. Period. Not a developer, not a construction company, a surveyor. If your cal
  4. RTK/PPK GPS Equipped Drones Another questions that I'm asked almost every time I'm contacted by guys looking for guidance is about strapping a PPK GPS system or a RTK GPS system on to their drone. This topic usually arises after we discuss how to create survey grade data and what it really takes to pass the QC of a surveyor. Basic principle: Unless you have a survey grade GPS system ($$,$$$.$$), can set your own ground control points (GCP's), and understand how to process GPS data and assign a coordinate system to your points (horizontally and vertically), you will need the assistan
  5. My first thought is that the imagery thats available by google is not orthoimagery. Its a compilation of stitched satellite imagery. If you look carfully at the google imagery, you can almost always see the sides of trees, buildings, light poles, etc. If overlay google imagery underneath survey linework, you can see that there is significant distortion (significant in survey land) in the imagery. With out diving into a big search on this topic, I'd say that google has an army of attorneys and I'm sure theres language somewhere that says that they release all liability as to how their imagery i
  6. Just as reference, here is Oregons ORS 672.002 (1)"Board" means the State Board of Examiners for Engineering and Land Surveying. (2)"Engineer," "professional engineer" or "registered professional engineer" means an individual who is registered in this state and holds a valid certificate to practice engineering in this state as provided under ORS 672.002 (Definitions for ORS 672.002 to 672.325) to 672.325 (Civil penalties). (3)"Engineering intern" means an individual enrolled by the board as having passed an examination in the fundamental engineering subjects. (4)"Geodetic s
  7. Is This Legal? This thread is intended to develop and discuss key points on whats needed to provide data to surveyors and engineers. The Nuts and Bolts of the question "Land surveyor license needed?" I've been involved in the thread "Licensed Surveyor License Needed" and my personal intro thread that discussed integrating drones into my day to day duties as a Survey Tech. I use an Inspire 1 Pro with an X3 camera with an Ipad Pro and have employed it on over 60 projects from 1 acre plots to a 21 mile by 2000' corridor project over the past year with great success. On my intro thread,
  8. Hey boys, Let me start by saying that I feel your pain. Not a good feeling when you loose contact with your bird. I've experienced this same issue in the past and through my research, I discovered that the shear amount of data that's being crunched in real time during flight was heating up the iPad so much that the processor was shutting off, as to not fry itself. The issue of shutting down I was having was with the Maps Made Easy pilot app. I've came to trust this pilot app above all others due to its capabilities for large multiflight missions, grid missions, linear missions (would
  9. Very well said, Kyle. I couldn't agree more with what you've said. I also feel your pain with dealing with TBC and the UX5. When i first started using drones, I was trained on the first gen UX5 and was tasked with flying cut blocks up in northern Alberta, Canada. As you said, the processing is a critical point that cant be overlooked. I havent worked with the photogrammetry module in TBC since then, but what I remember about it was that the software just wasn't up to snuff. What Trimble did was purchase a company out of Belgium i believe called Inpho. As the big players usually do, they b
  10. I'd have to disagree. DJI offers a wide range of drones that are more than capable of producing survey grade data. The vertical landing and take off is pretty legit, but in order to create survey grade imagery, speed is actually more important than you might think, but in the contrary. High speed imagery mixed with non perfect lighting creates blurry imagery, even when using the high dollar metrically calibrated cameras. Having longer flight times at a slower ground speed is what is needed. DJI P4P is a great starting point. 23mp camera and 25 min of flight time. Run it at 10 to 12 mph and you
  11. Using toy drones and cloud based processing are just a couple aspects of what differentiates non-survey grade data and survey grade data. To create survey grade, consistent, repeatable and reliable data, it's not just a push button deal. Knowledge of photogrammetry and surveying, especially coordinate projections, is a must. Survey grade GCP's and the ability to process your own data is also a must if you're looking for that kind of data. I can tell you that I've produced data with drones that has been within a tenth of survey grade total stations, GNSS, and HD laser scanner data. If you're lo
  12. In a lot of cases, drone data can be higher quality and better than data collected using conventional methods, especially if you have inexperienced field guys doing topo. But, like you said, there is no replacement for the traditional methods. There will always be a need for traditional survey equipment, but just like GNSS, when that was introduced, surveyors were hesitant to use it because is was voodoo. Now its "traditional equipment". Drones will eventually be in the tool box of most surveyors. In my opinion, it would be foolish not to have one. Your concern about producing groun
  13. Its hard to believe that people are getting away with producing actual surveys when they are unlicensed land surveyors. I'm not buying that. In my mind, a survey is a stamped legal document. Sure, people are producing maps who are not PLS's, but are they determining boundaries, creating legals, know what schedule B items are or know what aliquot means? Very unlikely. I can see your frustration as your/our clientele is dwindling (or being reduced slightly) because drones are impacting the types of jobs you/we get, but I think you're overseeing an important aspect of your concerns.
  14. Hey Kam, I'm interested in having a chat with you regarding this topic. I'm more than willing to talk shop with anyone willing to listen. It's an exciting new world of Technology and UAS is going to creep on the survey industry just like GPS did in the 80s. Feel free, everyone and all to email me with questions, comments, orconcerns. Thanks, Dan
  15. Hey guys, I thought I might chime in here. I'm a land surveyor in Idaho, USA, and hold a degree in Geomatics. I am in the process of starting a UAS Department for my current employer which is a Land Surveying, Engineering, and Landscape Architecture firm. My goal is to provide UAS ground data that a licensed land surveyor will feel comfortable signing and stamping. This is the final goal for many of you looking to provide "survey grade" ground data. But, let me tell you, its not as easy as just using centimeter grade GPS or a 1 second Total stations to set GCP's. A huge part of our j