I ran an OPUS reduction on a couple of points that I also hit RTK with my Leica GS14.
Leica Geo office has a 2 geoid choices for MA, but they both reference geoid 09 while OPUS is reducing using geoid 12A. The leica projection is MA mainland, NAD 83, and the OPUS is NAD83, too.....
I find about a 30' difference in coordinates between the same points. Is there that much of a shift between geoids? I thought it was marginal, like less than a foot.
Am I missing something obvious, or not even not so obvious?
Dtp
There should be a zero difference in horizontal positioning among different geoids. Something is definitely fishy in the cornpatch with your software.
Geoids won't shift the horizontal position, the geoid number is dependent on the horizontal position.
You should most likely be using 12A but that might not be the problem. Maybe take a look here anyway:
http://www.mainetechnical.com/blog/guide-for-installations-and-operation-of-geoid-2012a-in-leica-geo-office/
Maybe try same procedure between RTK and OPUS on some NGS control points with published horizontal and vertical values so you have something to compare your results with.
I would tend to believe the opus coordinates since the are calced from multiple baselines. So, the questions I'd look at first is how confident I am with my RTK base coordinates? It could be a simple matter of keying in a coordinate wrong to start the survey, or setting up using the wrong point or point number.. I assume you did not localize you RTK.
NAD 83 (2011) only works with Geoid 12A , so I am told ..But 30 'sounds a bit like a bug .
For a 30' bust, I would go to Google Earth and get the lat-long of the point (if you can), then use Corpscon to covert to SPC's. That will verify your OPUS fix and isolate your bust to your software.
Metzger-Willard also has KML file on their website that will give you SPC's in Google Earth.
What coordinates are you referring to? I can see conversion to state plane getting goofed up somehow, but the UTM or Lat. Lon. should be the same.
I agree, check your lat-longs against each other too.
although she gets to be pretty naggy, i'd turn siri back on to let you know when you're initialized...
If you're in State Plane...something set to International Feet vs Survey Feet?
Network rover or base/rover set up for the GS14?
The gs14 is an RTN/RTK rover. Previously, on two other jobs I did the same thing, used the gs14 for some topo and the sokkia for some static work. When I compared results the difference was negligible, maybe 0.02 in all three dimensions.
This is the first time that I've had an issue like this.
I'll go back on Monday and re-check the computations.
Dtp
Coordinate shift between WGS 84 and ENU
Hello
I am new in Leica Geo Office and I have measurements in Leica Rx 1210 T with RTK in WGS 84 system.Now I want to convert co-ordinate in East,North Up(ENU) system from WGS 84 or Lat,long and height to ENU system.I tried but could not succeed.Can anybody inform me? I am using Leica Geo office combined in my work
Auto0972 Navigated 10/01/2014 10:21:00 3789225.1782 911834.6999
5032019.4821 6.0939 need to ENU system conversion
WGS 84 to ENU system ?
can anybody help me?
Best
Taher
Coordinate shift between WGS 84 and ENU
If I understand correctly, you are trying to use local geodetic horizon coordinates (NEU) in combination with WGS 84 ellipsoid (lat, Lon, ellip height) values. The simplest way to do this outside of the Leica software (of which I am unfamiliar) is to use the 3D version of the forward software on the US NGS web site. The program is linked here: http://www.ngs.noaa.gov/TOOLS/Inv_Fwd/forwrd3d.html . It allows you to specify a starting coordinate in either geodetic or Cartesian then enter the measurements as either dN, dE and dU or dX, dY and dZ.
Alternatively, you can use the convert the dN, dE and dU to dX, dY and dZ and add them to the starting point's XYZ coordinates. If I get a chance I will post a link to my old site's lecture on the process. See http://geodesyattamucc.pbworks.com
Ask more specify questions for a better answer.
Coordinate shift between WGS 84 Lat/Lon/Ehgt and ENU
WRT the issue of NEU and XYZ conversions see the page below and on it the link to the class and lecture shown.
http://geodesyattamucc.pbworks.com/w/page/13931102/FrontPage
Class 13: 6 March 2013 - Yet more ellipsoid computations
Lecture12–MoreDamnedEllipsoidStuff.pdf - lecture
Coordinate shift between WGS 84 Lat/Lon/Ehgt and ENU
Dear GeeOdd Mike
Thank you very much and I am trying to convert but still not successful .It shows error invalid lat,lon,Ellip height but I gave proper order
X Y Z
3789225.1782 911834.6999 5032019.4821
3789225.1788 911834.7051 5032019.4823
gave same error it I also give value
Lat Long Ellip Height
52° 25' 39.72550" N 13° 31' 49.21270" E 71.2439
52° 25' 39.72546" N 13° 31' 49.21297" E 71.2439
with space but without N,E and °,'," but shows error.I am looking to solve it so that I can solve
this error.
Best Regards
Taher,Muhammad Abu
Berlin
Coordinate shift between WGS 84 Lat/Lon/Ehgt and ENU
Perhaps I misread your original message. Your reply to me indicates that you are interested in the relationship between two points and not ciomputing a new point. In that case, a geodetic inverse is the problem.
Taking your values, I used the NGS site INVERS3D tool with the following results. Note that the distance between the two are expressed as both DXDYDZ and DEDNDU.
First Station : Pt A
----------------
X = 3789225.1782 m LAT = 52 25 39.72550 North
Y = 911834.6999 m LON = 13 31 49.21270 East
Z = 5032019.4821 m EHT = 71.2440 Meters
Second Station : Pt B
----------------
X = 3789225.1788 m LAT = 52 25 39.72546 North
Y = 911834.7051 m LON = 13 31 49.21296 East
Z = 5032019.4823 m EHT = 71.2452 Meters
Forward azimuth FAZ = 104 51 54.2551 From North
Back azimuth BAZ = 284 51 54.2551 From North
Ellipsoidal distance S = 0.0051 m
Delta height dh = 0.0013 m
Mark-to-mark distance D = 0.0052 m
DX = 0.0006 m DN = -0.0013 m
DY = 0.0052 m DE = 0.0049 m
DZ = 0.0002 m DU = 0.0013 m
Zenith (mk-to-mk) ZD = 76 7 34.86
Apparent zenith distance = 76 7 34.86
Coordinate shift between WGS 84 Lat/Lon/Ehgt and ENU
Hello GeeOddMike
good morning.As I informed you earlier,I am trying to solve,I could not succeed in softaware FORWARD3D,instead in used GeoCalc but my GrafNav 8.50 solution and Geocalc solution is very different each other.
I have data in WGS 84 in lat,lon,height----I want to go UTM--- easting,Northing co-ordinates
52° 25' 39.72550" N 13° 31' 49.21270" E 71.2439
52° 25' 39.72546" N 13° 31' 49.21297" E 71.2452
52° 25' 39.72568" N 13° 31' 49.21293" E 71.2321
52° 25' 39.72523" N 13° 31' 49.21412" E 71.1940
52° 25' 39.72507" N 13° 31' 49.21497" E 71.1649
52° 25' 39.72507" N 13° 31' 49.21470" E 71.1456
52° 25' 39.72553" N 13° 31' 49.21435" E 71.1475
But,Unfortunately, i am confused which is correct,In grafNav,i have value
Easting Northing H-Ell SDHoriz SDHeigh Q
(m) (m) (m) (m) (m)
400072.176 5809625.821 75.647 1.487 2.491 4
400072.176 5809625.821 75.647 1.487 2.491 4
400072.176 5809625.821 75.647 1.487 2.491 4
400072.176 5809625.821 75.647 1.487 2.491 4
400072.176 5809625.821 75.647 1.487 2.491 4
400072.176 5809625.821 75.647 1.487 2.491 4
400072.187 5809625.779 75.711 2.036 3.505 4
400072.205 5809625.774 75.806 2.054 3.516 4
400072.211 5809625.776 75.812 2.061 3.519 4
Now I want to be sure in GeoCalc i have value in
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
-120480029,, 9987031,1176, 95,9830
Which seems to be weird.So i decided to do in Matlab to get actual value.If you have any link regarding software,Matlab code plase let me know
Best
Taher
