I am very new to this area - more driven by the need.
My task to do a topographic survey of a area in Sierra Leone.
I have a DJI drone incl. LiDAR sensor and a RTK station.
But to optimise the absolute measurement accuracy I need to measure a reference point, with ± 5-10cm deviation. I do not know, if there are NTRIP data available in Sierra Leone, Kono district. Therefore my question to you here:
Do you know, if NTRIP data or similar is available in Sierra Leone?
Could I get the accuracy by using one base station and rover?
Thank you very much in advance!
Best regards
Stephan
I’ve also made a little research and couldn’t find any NTRIP service in Sierra Leone.
However, you can obtain a point for the base station with PPP method. Then collect reference points in RTK or PPK with base and rover pair of receivers. With this setup you can obtain an absolute accuracy.
I’ve checked the Trimble RTX. It’s one of real-time PPP services, which are not supported by Reach units now. But I will note your request and pass it to the team!
Once worked in Sierra Leone (Salone), There was no NTRIP. They are a few National Beacons along the coast, inland i doubt but most of them were destroyed. We managed to find one in Pepel right at the Port which was in UTM system. We used that one to do a 250km railway from Pepel to Tonkolili. Our primary control was Static BM every 25km, then densified secondary control to 5km Static again. Levelled the whole 250km with dumpy. Good luck with finding control in Kono its about 100km straight distance from Tonkolili
Thank you very much!
I deal with the PPP method now. Based on my testdata it seems to be good.
I used the Canadian website. Only I am concerned regarding accuracy in local coordination system. I am no professional and that is all confusing
