All your videos are very informative. Thanks for taking the time to do these. Would really like to see a video on selection of the coordinate systems and ellipsoidal vs using a Geoid. How do know what the CORS station is using and what others on your jobsite typically use so everything works together. That part confuses me. Thanks
Buenos días. Excelente video, ojalá continúen produciendo más contenido sobre este apasionante tema. Te comento que soy nuevo en el ámbito del gnss, por lo que pido tu ayuda con lo siguiente: Es correcto el siguiente flujo de trabajo Stop & Go? 1. Iniciar la base con coordenadas conocidas (formato ubx o rinex, y en modo estático). 2. Iniciar el rover y configurarlo igual que la base, con la diferencia que este rover seria cinemático (ambos equipos a 1 herzt). 3. Para iniciar el trabajo de campo: El equipo estático o base debe estar encendido y capturando data gnss en formato ubx o rinex. Paralelamente, el rover debe estar capturando data gnss, y en este rover móvil debo capturar también los puntos de detalles que el Reachwiev lo guarda en csv. ¿Hasta aquí, es correcto el procedimiento o flujo de trabajo? Tengo las siguientes consultas: 1. En vez de estacionar la base, puedo usar la data gnss de una estación de rastreo permanente (postproceso). 2. Los equipos (Emlid) necesitan estar enlazados vía Lora? Gracias mil por vuestra ayuda, y en espera de sus comentarios. Edgardo
Hi Benny, you can survey the GCP's in any CRS. It can be WGS84 Lat/Lon, WGS84 UTM, NAD83 State Plane Coordinates. etc. Because when you do your photogrammetry processing, you will specify which CRS the GCP points are in. Ideally you have a Base/Rover setup for your mapping mission. If so, you would fly your M3E using RTK with your onsite base being the reference. If you are using Emlid units, you can do RTK a variety of ways (see my video on that). If you are using Stonex then you can use www.rtk2go.com for RTK or local NTRIP just like the Emlid units. Same goes for Carlson BRX7 units. I hope this helps. I always survey the GCP's in the CRS (coordinate reference system) that the job will be delivered in. So if I do a job for the engineer and they want the files to be in NAD83(2011) Mississippi West us survey feet, then that is what I shoot my GCP's in. Then when I use DJI Terra, Pix4D, Agisoft, or any other photogrammetry I will specify that the final CRS is the same (MS West). Hope this helps. Holler if you have questions.
Have you ever had it lose your survey? I did two the other day and everything was fine. Collected about 9 points and when I got back to the office it wasn't on the RS2.
Chris, so now you can do the survey either on the RS2 unit itself (via Web Browser), or the much better option is the using the ReachView 3 app. If you used the RV3 app, the survey is stored on your phone/tablet and not the RS2. So just making sure that is not the case. If that is not the case, I have no idea. I have never had a case where the survey just vanished per say.
In my opinion yes it does I only did 10 seconds because this was a demo video. When capturing Ground Control points I use a bipod and let it collect for 2 minutes. When I am collecting topo points, I only collect for 5 seconds. I did a 26 acre Lidar mission yesterday ( and recorded some video for a tutorial). I collected all GCP's for 2 minutes. I had 150+ topo shots that I did handheld for 5 seconds each.
Hi Ramesh, I am assuming you are asking if you can use the Sparkfun GPS/RTK Receiver? You can use any GNSS receiver to collect (survey) ground control points. But the accuracy could vary greatly depending on what unit you are using. The accuracy of the Reach RS2 is very good. I have no idea on the accuracy of the Sparkfun receiver. It would also depend on the quality of antenna that you paired with it. I highly recommend using a dual frequency receiver which will allow for a longer base line (distance between your rover and base unit). If you are using a Sparkfun GPS receiver, which generates a UBX file. Paid software such as EZsurv and TopoSetter would process it. and I am sure that RTKlib could process it just fine but I don't know for sure.
