Misplaced ntrip base in SWmaps and Survey master.

GPS/GNSS Development Boards
1

I have a question about the location of the correction base in SWmaps.

I work in South America and I use ntrip corrections from IGM Uruguay with SWmaps and with Survey master.

The corrections work fine but the two applications locate me to the base in the wrong way.

The first places it in the middle of Asia and the second assigns latitude and longitude values 0 and 0.

Has anyone had the same problem?

I clarify that with professional equipment that I also use, the location of the correction base is correct.

I appreciate the help and by the way I comment that I am very satisfied with the sparkfun facet as a rover and as a base for ntrip.

Cheers

2

Would you mind sharing some lat/long points or screenshots showing the issue? It almost sounds like a sign is getting flipped.

3

Hello. I add a screenshot of Swmaps where you can see the erroneous coordinates of the station UYTT.

The approximate coordinates of the base station should be 33S and 54w.

I reiterate that the corrections work very well. Only the misplaced base appears. In Survey master the same thing happens but it places it at latitude 0 and longitude 0 and the basemap does not appear because of that.

I keep investing.

https://drive.google.com/open?id=1BYOYo … p=drive_fs

4

I upload the image that is not seen.

Thank you

Screenshot_20220817_220723_np.com.softwel.swmaps_1.jpg
Screenshot_20220817_220723_np.com.softwel.swmaps_1.jpg1080×2160 142 KB

5

international code UYTT 42318M001

6

Very curious! I do not have a good explanation for you.

7

It looks like the base station coordinates are either set incorrectly, or in a different coordinate reference system. There’s not much we can say without looking at the RTCM stream being sent out by the base station.

8

The strange thing is that with other applications like Landstar 7 from CHCnav it works fine.

9

The IGM Uruguay transmits the message 1006 with the base coordinates correctly, I have analyzed it with RTKLIB.

Is it possible that SWmaps and Survey Master are not analyzing this message or are interpreting it wrongly?

10

It’s a bug in the program, it doesn’t correctly interpret the messages from the station where the corrections are taken and ublox interprets them, it works with receivers with trimble cards, so I assume that the companies that provide Ntrip positioning services also use proprietary Nmea messages

11

I think the same thing. I will try to contact the application support.