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If you have cellular coverage and the mount point is close enough - you can use NTRIP services (paid or free). Use a base station if you are in a remote area for RTK - or you want to use a static log from the base for post processing (a PPK workflow). Neither or these workflows are specific to lidar or photogrammetry data collection.

Happy to help!

Thanks Nathan

Good to know, will pass it on to the Geolocarta team.

Loctite on the thread keeps everything sitting in the right spot!

Localisation is useful when we don’t have the precise parameters of the local coordinate system. In this instance we have the coordinates from the local survey marks (PSM's) so localisation is not required in this instance. Olga from Emlid explains this really well in this link: community.emlid.com/t/localization-in-emlid-flow/35351

Thanks for that tip. I'm not sure our team have come across this as they usually use a PPK workflow.

Could you do a PPK workflow tutorial for collecting GCPs and flying an RTK enabled drone (DJI Prefered?) @@MangoesmappingAU

Hey thanks for that feedback. Who would have thought there's so much to know about 2 sticks joined together!

Hi Herminio - thanks for getting in touch. Can you please let us know your contact details or email sales@mangoesmapping.com.au

Sure is a handy trick - bit cheaper than a powerbank too

Hi Michael - thanks for that feedback. Not sure which model you're using but you may be interested in our latest video by our partner company Map Gear - here's a link : th-cam.com/video/o8BUzffeIxY/w-d-xo.html

What sort of work are you hoping to do? Photogrammetry? Lidar capture? Emlid have some handy tutorials on their site for getting set up for precise aerial surveys using Emlid Reach GNSS receivers docs.emlid.com/reachrs2/tutorials/integration/dji-rtk/

It would depend on the area of operation, height of the canopy and type of trees. In general we don't recommend using around trees as any vegetation can interfere with radio signals.

We don't sell any here but if you are researching, check out Victron Energy for DC - AC inverters or the Honda range Inverter Generator's.

Good point, Reachview 3 has now been superseded by Emlid Flow so plenty of changes in the last 18 months.

Thanks - we do to, especially since we did the new drivers seat upgrade! We are thinking of doing a walkthrough video showing how we set it up - anything you'd like to see?

It is incredible. In the scheme of things, the purchase costs of an RTK drone are negligible but you must be prepared to pay the second price! The price of time to learn and implement a workflow. If your landscapes are clear of vegetation then aerial photogrammetry may be an excellent way to get the data you need. Take a look at the Mavic 3 Enterprise with RTK www.mangoesmapping.com.au/products/dji-aerial-survey/dji-mavic-3-enterprise-series/ . If you want to move up to LiDAR capture then take a close look at the M300 (which is about to be replaced by the M350) www.mangoesmapping.com.au/products/dji-aerial-survey/dji-matrice-300/.

Hi thanks for that feedback - sorry about the delay! We use Benchmrk by Geolocata. Here's a link: play.google.com/store/apps/details?id=com.storytellermaps.benchmrk&hl=en_AU&gl=US. or for IOS: apps.apple.com/au/app/benchmrk/id943242395

​@@MangoesmappingAUanything for USA?

@@timd9430 Not that we are aware of. I imagine it might be a bit more complicated getting unified data into a single point for the USA.

Thanks for the great questions. No change to battery life, all we are doing is changing the propagation of the 0.1watts into a more focussed beam. The radio power remains at 0.1w. The change in focus has not been noticed by us in terms of polarisation sensitivity becoming a problem. The kit works just as well with the RS2+.

Hi MarcDoc, Emlid provides its free app, Emlid Flow to control the units and perform surveys. However, you can also easily integrate the receivers to work with third-party surveying software. Emlid has tutorials for integration for some of the software such as ArcGIS Survey123, QGIS, and Microsurvey FieldGenious. Tutorials are available here: docs.emlid.com/reachrs2/tutorials. Noel from Detail Survey has created a video and more information on working with 12D Field here: community.emlid.com/t/connection-over-bluetooth-to-3rd-party-device/16998/10

Happy to help! Thanks for your feedback!

Thanks for your question. Both the Reach RS2 and RS2+ have RS-232 and USB-C ports which can be configured to enable Position Streaming to third-party devices. You can read about this on more detail here: docs.emlid.com/reachrs2/reference/specifications/specs/#ports-overview You may also find a community discussion about echosounder communication with the RS2 here: community.emlid.com/t/echosounder-communication-with-rs2/26741 Let us know if that helps.

@@MangoesmappingAU yes I did read about it and it is commendable... But the cable should come with it in the pack . I shouldn't be made to buy the cable at a separate cost

@@nsikakobongeyakz4032 Thank you for your interest. The RS2+ units come with a USB-C cable and the serial cable is an optional extra for specific use cases. Let us know how we can get in touch so we can help you with your projects.

@@MangoesmappingAU thank you so much for your response

Mangoesmapping default to PPK workflows, regardless of location, due to the lower positional uncertainty associated with PPK compared with RTK surveys. It's something of a personal choice. Some people prefer RTK surveys, so they get realtime feedback regarding fix vs float, however on the sites we work, we're never had a problem getting fix with our PPK workflow. In remote locations where RTK is desirable, Emlid have a clever feature called 'Local NTRIP'. Cameron Baker does a good job describing how this can be used in conjunction with a DJI M300 here: community.emlid.com/t/m300-rs2-local-ntrip/31770

At this stage we're not aware of different brands working together - easily. We plan to conduct more in-depth testing on this in the future.

@@MangoesmappingAU thanks fo quick reply

Hi Jerusha. Were you wanting training to fly the M300 or training for conducting aerial surveys? We do not provide flight training or licensing - but could assist with survey training if this is required.

Hi Oscar, We recommend a triple magnet base as these have a much stronger holding capacity. In Australia, these are available on the Map Gear site: www.mapgear.com.au/product/triple-magnetic-mount-1/ Which country are you based in?

Hi Eric - we do a heap of projects to create known points using static logging so we will definitely make a video to share the finer points of this process. I'll shuffle it up the priority level on the 'to do' list!

@@MangoesmappingAU awesome, thanks, I really appreciate it!

There is an indepth PDF attached to an article here: www.mapgear.com.au/emlid-vs-trimble-gnss-receivers/

Which one is better

Thanks for your question Edmond, We do not have direct experience with the D-RTK2 base station from DJI, however we see from our client list (including major national DJI retailers) that the Emlid RS2+ is a popular and more versatile alternative. Feedback from our customers indicate that to collect GCP coordinates with a D-RTK2 is really inefficient and impractical for the following reasons: 1. You need to use your Phantom controller as your field data collector (in mode 3?) 2. Using local corrections from a 2nd D-RTK2 base uses Occusync to broadcast the RTCM corrections from base to rover, with a ground to ground range of around 1km (effectively line of sight and variable based on local conditions - in some occasions this may be longer), based on feedback from experienced users. 3. Using an Emlid receiver as a base outside of mobile coverage (as is often the case here in Australia...) would require the user to broadcast the correction via wifi from the Emlid GNSS receiver to the DJI controller, which is also used to collect the GCP coordinates from the D-RTK2 rover. Therefore, this is impractical 4. Using NTRIP, a user can consume a correction from a D-RTK2 base or from an Emlid GNSS receiver (ie. using the free Emlid Caster), and with a SIM card in both the base station and the DJI controller. 5. The poor construction of the tripod, and lack of support for datums other than WGS84 render this workflow inoperable for most surveyors. As a consequence, the majority of our DJI customers do not even purchase the D-RTK2 base, and instead purchase 2 Emlid RS2+ receivers - 1 to use as a base, and one as a rover. This is a proven, cost effective and versatile solution. In the case that you operate exclusively in mobile areas with a good CORS network, you would only require 1 RS2+ that can be used as the base during aerial surveys, to provide a RINEX file with a short baseline, and also as a rover, to coordinate your GCP's. Keep in mind that when using GNSS RTK, there is a non linear (compounding) error associated with the length of baseline between your base and rover. In an ideal world, you would keep this under a couple of km's, but of course you can stretch this out depending on the level of precision your client requires. In such a circumstance where high precision is required, I would recommend establishing an Emlid base over a known survey mark, rather than depending on a distant CORS reference station.You can then use Emlid Caster (or Emlid's local NTRIP over wifi) to broadcast a correction from your Emlid base to your drone controller.

@@MangoesmappingAU Thank you VERY much for the in-depth response! Makes good sense and I will take your advice and just go with the RS2+

Emlid have tutorials and very supportive user base via their forum, community.emlid.com/

@@MangoesmappingAU Good to know. Thanks a million once again. Blessings to all your endeavors.

Hi! We are facing a challenging situation that requires us to find an alternative way to power our drone operations. We have to drive while the drone is flying, and we would like to charge exhausted batteries in the meantime to never fully stop the mission. Therefore the 240v generator solution is off-limits. We would appreciate your expertise and advice on how to achieve this goal. By your experience, how many W/h (or A/h) is required to fully charge 8 BS60 for Matrice 300 RTK? Are there some all-in-one solutions for this kind of requests? We appreciate your prompt and detailed response.

Hi Andreas @@andreavise96 Thanks for your question. I cannot quite understand why using a 240v generator is off limits for you, based on the information provided, but assuming is is genuinely not an option, I don't think there is a silver bullet that will easily solve this problem for you. We have a 2KW generator and a 4.2KW generator that we can mobilise for remote jobs. The 2KW is more than enough to operate the TB60 charging station (which will only charge two batteries at a time, starting with the two batteries with the highest remaining power). If a generator is truly not an option, your remaining obvious choice is to take enough batteries with you that you do not need to charge any in the field (ie. we take 5 sets of batteries with us which is enough for many of our jobs and if needed, we can still charge in the field using a generator to keep our M300 airborne for larger jobs). Another alternatives include a large bank of 12v batteries and a large solar array to keep charge flowing to the 12v batteries, however this would not be a cheap or portable solution! I'm sorry we can't give you a simple answer to this question. We're really interested to hear of other creative solutions if any of our viewers have other ideas!

For RTK the rover unit needs to consume some correction input to achieve high-accuracy results. If the correction stream is sent via LoRa from the base to the rover, SIM cards are not required for either device. Our teams often work in remote locations where there is no access to 3G or 4G services. In these cases they rely on the correction stream sent using LoRa. If you are using an NTRIP correction source such as AusCORS or HxGN SmartNet, then you need a SIM card in the rover. No base stations are required for this method as corrections are being received from external sources via the Internet. If you want to broadcast corrections using Emlid's Caster service, you will need a network connection for both the base and rover. A network connection via an internal SIM card would be the easiest way to achieve this.

Glad you find it useful. We will put together more detailed video's of the flight planning and processing stages.... there's a lot going on!

Hi Ben, We have contacted the developer to get an update on their plans to broaden the software for the rest of Australia. I'll get in touch once we have some useful info to share. If you find any alternatives in the meantime - we'd love to know!

@@MangoesmappingAU Mate!!!!! you are a legend, thank you so much for that. Stephen has been in touch with me and I have just installed a test version of the software. It looks great, am looking forwards to testing it out in the field.

Hey thanks Ben, looks like you've been creating some great material too! You've been at it a bit longer than us - it must be great to be able to look back at the huge amount of material and see what has changed and what has stayed the same. Definitely subscribing to your channel :-)

@@MangoesmappingAU hahah, thanks mate. Yeah its a bit of yes and no. It is good looking back but at the same time, there are some videos that I have done that I find annoying and cringeworthy and so want to go and edit them, but I can't hahahahhaha I have actually been pretty slack lately, I don't post as often as I use to. I find the video part easy, it's the editing and the copy and the heading and the captions and the thumbnail and all that sort of stuff that I find time consuming and boring. Last few years I have sort of moved over to Instagram and I find that a lot easier, as it is just point and shoot and that is it, it is up and I can move on. But unfortunately, its too had to search for stuff on there, so I think TH-cam will always be the place people go when looking for something in particular. So I guess this is a bit of a kick up the butt for me to get a move on and start posting again hahahahahahah

@@GeelongCableLocations Yes - completely agree - it does take heaps of time but you can't beat the search factor of AI Google :-) ...

Thankyou for your comment Roberto. Please email your requests to: "hello@mangoesmapping.com.au" or visit our website for more contact options: www.mangoesmapping.com.au/