Good stuff. Your post was flagged by RUclips because of the link I thought I had approved it but I don't see it anymore. Would you mind re-posting it on my channel? I'll make sure to approve it.
Thanks for the informative video! Any chance you could make a tutorial on how to accomplish the same with RTKLib and maybe compare those results with EZsurv?
Hey Chris. It is absolutely possible. The main factor is how far the CORS station is from your job site. The only purpose in having a "static base" at the job site is to use that unit as your reference base and have really tight accuracy. But if you only have one Reach RS or M+, then you can likely get by. Once your CORS station gets about 15 miles or so away from your job site, you will begin to see a slight drop in accuracy the further out you go. But depending on what your needs are you can process your Rover log with a CORS station that was 50 miles away (maybe even further). You just need to determine from your customer what level of accuracy they require. Hope this helps!
So if you hadn’t used a base station, but just a rover yielding poor +/- 5+ meter GPS position, would/could Post Processing still be able to achieve cm accuracy or do you need a base and rover setup to get this?
Chris, if you use only a "Rover", then you can still do PPK processing using a CORS station as the base (if you live the US). Using L2 (dual receiver) units allows you to have a base (CORS) much further away with good results compared to using an L1 (single frequency) GNSS receiver. There are now good videos on using RTKLib (free) software for doing PPK processing. So you could get an Emlid M2 (low cost dual frequency) or RS2 (more costly L2 receiver) and you could get good results for marking GCP's. The term "centimeter level accuracy) is misused and misunderstood. There are many factors and errors that go into the data collection/processing (equipment, processes, attention to detail, atmosphere, software settings, many more). So achieving accuracy within 1cm is a very hard result to achieve no matter how good your equipment is.
You would have to post process your Rover Data in order to achieve good accuracy for the GCP targets. Without doing PPK processing, there would be no need to even do GCP's.
@@DroneMappingTools Thx for the beta. So to collect GCPs for drone mapping a single Emlid M2 or RS+ with ppk could do the job? No need for two receivers (rover & base)? BTW, for my purposes, by cm level accuracy I really only mean something like +/-10-12cm rather than +/- 3-5 meters. Used mostly for decent looking, well georeferenced cartography not build to location.
@@Chriscam2you In my opinion yes. If you have a low budget, then I would get the Emlid M2 and use that and I think you will get very good results. If your budget is higher then you can get the RS2 for $1800. And that is one dandy GNSS receiver. You will have to do post processing and the software that you can use for free is RTKlib. There are some tutorial videos out that now make that software doable for a lot of people. Back when I purchased EZserve I found it impossible to learn how to use the RTKlib utility. The M2 cost about $500, So The only thing else you would have to purchase would be a survey pole the bar pod and a converting mount so that you could mount your antenna And ground plane to the top of the survey pole
@@DroneMappingTools Awesome, thx again! I can get the Emlid RS+ for $799.00. Are you not a fan of this particular model? Would it be better, not any better, or worse than going the M2 route? I think the RS2 option might be a bit spendie for my little league operation.
Hi Daniel, are you talking about the plastic mount that held the laser measure? If so I designed and 3D printed it. But I will tell you that I no longer worry with that. I simply hold the laser up there where it should be and take a measurement. I can hand hold it in place and know that I am within 1-2 cm of accuracy which is good enough :) If not, tell me the time stamp on the video where it is at and I will look and see.
Can you tell me if you can modify the google maps heightmap using your Reach RS+ datapoints? And can you find them again afterwards using a tablet or something?
When you say heightmap, are you talking about creating a 3D model, or DSM? The Reach RS (or even the M+) is used to survey multiple ground control points (ie 3-10 points in a drone mapping mission). Then you use programs like Pix4D, Drone Deploy, or DroneMapper) to generate the point cloud of entire property which can then be used in different applications (like Global Mapper, QGIS, etc). If that is not what you were asking, give me some clarification and I will help the best I can :)
@@DroneMappingTools Yeah sorry my lingo is not up to date yet.... :p As simple as I can say it: can you use the data gathered with Reach to alter the visible terrain in Google maps?
@@futurecaredesign No you can not. The Reach RS and M+ are just L1 GPS receivers. You could survey many points on a property to then create an interpolated surface model using various software. But what most folks who are researching the Reach RS for is using it to mark GCP's (ground control points) which are then used to make the Orthomosaics and Digital Surface maps created from the drone images very accurate. Most average drone maps (under 1000 images) are going to have 3-10 GCP's placed over the entire property. I hope this helps. I found this link. Maybe it will be helpful. www.dronezon.com/learn-about-drones-quadcopters/introduction-to-uav-photogrammetry-and-lidar-mapping-basics/
@@futurecaredesign Sorry for the late reply. The Reach RS is an L1 GPS receiver. So it is used only to survey points. To create a high quality Digital Surface Model (DSM) , using drones is now the only way to go. In the old days, you cold traverse around a property for hours and hours (or even months) surveying a grid to create a fairly decent DSM. But even then, GIS software was required to process the surveyed grid and create the elevation map (or DSM). Now you can use drones and photogrammetry to create very precise surface models and 3D models. Marking GCP's within the flight area is what ties the accuracy down. Hope this helps. www.pix4d.com www.dronedeploy.com www.DroneMapper.com
@@DroneMappingTools Cheers for the quick replies. I am seriously considering to buy this kit seeing as the costs is pretty much double of having a survey done. Then there is the autonomy part and the fact I can use it for jobs.
@@rikimontano I'm away from the office, but I will check that. I will also look at the contact form. I recently made some changes to the site and that may have gotten messed up. Thank you for letting me know
@@rikimontano I just checked the contact form and it is working. If you are out of the USA then it may not work as we have that blocked. www.midsouth360.com/contact_midsouth360/ or email to timmyd@midsouth360.com
Love that laser tape measure in the thumbnail
This is great. A tutorial like this has been needed for a long time. I appreciate you posting.
this is great, thanks i appreciate your posting.
You did not explain the Export Profile. I do not see one labelled GCP Can you give a brief reply back on how to create it
thanks for this :)
Good stuff. Your post was flagged by RUclips because of the link I thought I had approved it but I don't see it anymore. Would you mind re-posting it on my channel? I'll make sure to approve it.
I think it is all good. I saw the link my post in your latest on your latest GCP video. Love your channel! Keep'm comin
Thanks for the informative video! Any chance you could make a tutorial on how to accomplish the same with RTKLib and maybe compare those results with EZsurv?
That is definitely on my to-do list. I hope to have that done no later than this Feb. Thanks for watching!
@@DroneMappingTools Brilliant, looking forward to it! Thank you for taking the time and sharing :)
anyone using reach rs+ for lot survey? e. g. cadastral.
Thank you for the video. Great stuff. Is it possible to collect points from GCP's with just a rover and the CORS correction?
Hey Chris. It is absolutely possible. The main factor is how far the CORS station is from your job site. The only purpose in having a "static base" at the job site is to use that unit as your reference base and have really tight accuracy. But if you only have one Reach RS or M+, then you can likely get by. Once your CORS station gets about 15 miles or so away from your job site, you will begin to see a slight drop in accuracy the further out you go. But depending on what your needs are you can process your Rover log with a CORS station that was 50 miles away (maybe even further). You just need to determine from your customer what level of accuracy they require. Hope this helps!
So if you hadn’t used a base station, but just a rover yielding poor +/- 5+ meter GPS position, would/could Post Processing still be able to achieve cm accuracy or do you need a base and rover setup to get this?
Chris, if you use only a "Rover", then you can still do PPK processing using a CORS station as the base (if you live the US). Using L2 (dual receiver) units allows you to have a base (CORS) much further away with good results compared to using an L1 (single frequency) GNSS receiver. There are now good videos on using RTKLib (free) software for doing PPK processing. So you could get an Emlid M2 (low cost dual frequency) or RS2 (more costly L2 receiver) and you could get good results for marking GCP's. The term "centimeter level accuracy) is misused and misunderstood. There are many factors and errors that go into the data collection/processing (equipment, processes, attention to detail, atmosphere, software settings, many more). So achieving accuracy within 1cm is a very hard result to achieve no matter how good your equipment is.
You would have to post process your Rover Data in order to achieve good accuracy for the GCP targets. Without doing PPK processing, there would be no need to even do GCP's.
@@DroneMappingTools Thx for the beta. So to collect GCPs for drone mapping a single Emlid M2 or RS+ with ppk could do the job? No need for two receivers (rover & base)?
BTW, for my purposes, by cm level accuracy I really only mean something like +/-10-12cm rather than +/- 3-5 meters. Used mostly for decent looking, well georeferenced cartography not build to location.
@@Chriscam2you In my opinion yes. If you have a low budget, then I would get the Emlid M2 and use that and I think you will get very good results. If your budget is higher then you can get the RS2 for $1800. And that is one dandy GNSS receiver. You will have to do post processing and the software that you can use for free is RTKlib. There are some tutorial videos out that now make that software doable for a lot of people. Back when I purchased EZserve I found it impossible to learn how to use the RTKlib utility. The M2 cost about $500, So The only thing else you would have to purchase would be a survey pole the bar pod and a converting mount so that you could mount your antenna And ground plane to the top of the survey pole
@@DroneMappingTools
Awesome, thx again!
I can get the Emlid RS+ for $799.00. Are you not a fan of this particular model? Would it be better, not any better, or worse than going the M2 route? I think the RS2 option might be a bit spendie for my little league operation.
Where did gou get that mount to hold the measuring tool?
Hi Daniel, are you talking about the plastic mount that held the laser measure? If so I designed and 3D printed it. But I will tell you that I no longer worry with that. I simply hold the laser up there where it should be and take a measurement. I can hand hold it in place and know that I am within 1-2 cm of accuracy which is good enough :) If not, tell me the time stamp on the video where it is at and I will look and see.
How much is the software
I pay close to $1,500, and that's been a couple years ago. I would assume it's close to the same now. well worth the price in my opinion.
Can you tell me if you can modify the google maps heightmap using your Reach RS+ datapoints? And can you find them again afterwards using a tablet or something?
When you say heightmap, are you talking about creating a 3D model, or DSM? The Reach RS (or even the M+) is used to survey multiple ground control points (ie 3-10 points in a drone mapping mission). Then you use programs like Pix4D, Drone Deploy, or DroneMapper) to generate the point cloud of entire property which can then be used in different applications (like Global Mapper, QGIS, etc). If that is not what you were asking, give me some clarification and I will help the best I can :)
@@DroneMappingTools Yeah sorry my lingo is not up to date yet.... :p
As simple as I can say it: can you use the data gathered with Reach to alter the visible terrain in Google maps?
@@futurecaredesign No you can not. The Reach RS and M+ are just L1 GPS receivers. You could survey many points on a property to then create an interpolated surface model using various software. But what most folks who are researching the Reach RS for is using it to mark GCP's (ground control points) which are then used to make the Orthomosaics and Digital Surface maps created from the drone images very accurate. Most average drone maps (under 1000 images) are going to have 3-10 GCP's placed over the entire property. I hope this helps. I found this link. Maybe it will be helpful. www.dronezon.com/learn-about-drones-quadcopters/introduction-to-uav-photogrammetry-and-lidar-mapping-basics/
@@futurecaredesign Sorry for the late reply. The Reach RS is an L1 GPS receiver. So it is used only to survey points. To create a high quality Digital Surface Model (DSM) , using drones is now the only way to go. In the old days, you cold traverse around a property for hours and hours (or even months) surveying a grid to create a fairly decent DSM. But even then, GIS software was required to process the surveyed grid and create the elevation map (or DSM). Now you can use drones and photogrammetry to create very precise surface models and 3D models. Marking GCP's within the flight area is what ties the accuracy down. Hope this helps.
www.pix4d.com
www.dronedeploy.com
www.DroneMapper.com
@@DroneMappingTools Cheers for the quick replies. I am seriously considering to buy this kit seeing as the costs is pretty much double of having a survey done. Then there is the autonomy part and the fact I can use it for jobs.
Hi, do you have any email or webpage where i could reach you?
thanks
www.midsouth360.com
@@DroneMappingTools your contact form doesn´t work, i sent a message to your facebook page, could you check the inbox?
@@rikimontano I'm away from the office, but I will check that. I will also look at the contact form. I recently made some changes to the site and that may have gotten messed up. Thank you for letting me know
@@rikimontano I just checked the contact form and it is working. If you are out of the USA then it may not work as we have that blocked. www.midsouth360.com/contact_midsouth360/ or email to timmyd@midsouth360.com