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Survey Pro GNSS – How To Do a 1-Point Localization
I am a long time Survey Pro user, but only recently (due to changing jobs) using it to run RTK GNSS. I come from using Carlson’s SurvCE to run RTK GNSS. I don’t see how to perform a “1-Point Localization” in Survey Pro, can someone explain to me how? What I want to be able to do is setup my base on a new random point and begin a survey with autonomous coordinates. Then I want to be able to take my rover to a known point with good state plane coordinates and localize to it (i.e. adjust my base to a good state plane coordinate based on the rover’s position). I’ve tried searching the manual and forums to no avail. For what it’s worth, I’ve yet to do any localizations/site calibrations in Survey Pro; all my GNSS work has been on state plane grid so far. I’m running Survey Pro version 6.2.0.23 and using Spectra SP80’s.
Thanks!
-Garry -
24 Replies
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With one point, you can’t localize. You are basically transforming, with no rotation and no scale.
Does NOT make any sense to do a one point localization.
Just set up a state plane projection, get an autonomous position at the BASE, log state data, send static data to OPUS, correct base with OPUS results, the entire project is on SPC.
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I understand it’s not technically a “localization” – sorry, it’s carry over from SurvCE (I think). Yes, I just want to “translate” coordinates. And I also forgot to clarify that I need to do this real-time in the field, not processed afterwards (no issues with the afterwards office processing and using OPUS). This is a situation where I need real-time state plane position to perform stakeout, but occupying the “known point” with my base is either not an option or would require 2 setups thereby unnecessarily wasting time.
I am used to having the options in SurvCE to do a “One-Point Localization” (a i.e. “transformation”), a two-point rotation only, a two-point scale and rotate, or a full blown “site calibration” to multiple points. I’ve used each of these options over the past few years and each one is real-time in the field only.
-Garry
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This is a useful feature.
Go to job, already on spc.
Set up autonomous.
Hit a known point. Base is updated. Set some points. Go home. Opus later, get a 2x check.
That was something that I wished survey Pro could do, back when I used it. Saves a trip to field.
Nate
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Here are the steps I use:
Open new job, create a point, Start GPS survey, Start Survey with Regular Setup, Select Mapping Zone, next, Set new base, connect to base, it then asks if I want choose an existing point or create a new one. Create a new one, then you connect to the rover and go occupy a known SPC point.
I’m using V 4.1.6 with a Topcon HiperLite+
Hope this helps
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Nate, I’m confused. Are you saying Survey Pro can’t do it? What do you mean by “Hit a known point. Base is updated. . .”?
Maybe I’m missing that Survey Pro has the ability under “translate points” as a transformation and not a “localization/calibration”? I’m guessing the software might then require a reconfigure of the base (i.e. “start survey”) after you do the translation?
Thanks,
-Garry -
Here are the steps I use:
Open new job, create a point, Start GPS survey, Start Survey with Regular Setup, Select Mapping Zone, next, Set new base, connect to base, it then asks if I want choose an existing point or create a new one. Create a new one, then you connect to the rover and go occupy a known SPC point.
I’m using V 4.1.6 with a Topcon HiperLite+
Hope this helps
Okay, but what are the steps after you occupy the known SPC point? Process makes sense to me right up to that step.
Thanks,
-Garry
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I don’t use Survey Pro. But if you were using Topcon gear with Topcon Magnet Field you can do want you.
Setup job with SPC projection set base on unknown point, get an autonomous position.
Use Rover to occupy a known point. Locate that point in Topo, calling it the same point already in the controller. You will be prompted by DC that the point already exist and given the option to rename, overwrite or Adjust BASE. You want to select ADJUST BASE. Then you are prompted to store new point for the BASE, recomputed from the occupation. All data in DC will be adjusted to align with the new base coordinates.
Not sure if Survey Pro has this option.
If you don’t define the SPC projection, then your bearings will be aligned with Geodetic North, not Grid North.
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Here are the steps I use:
Open new job, create a point, Start GPS survey, Start Survey with Regular Setup, Select Mapping Zone, next, Set new base, connect to base, it then asks if I want choose an existing point or create a new one. Create a new one, then you connect to the rover and go occupy a known SPC point.
I’m using V 4.1.6 with a Topcon HiperLite+
Hope this helps
Okay, but what are the steps after you occupy the known SPC point? Process makes sense to me right up to that step.
Thanks,
-Garry
After the point is occupied, I have the choice to accept the results and it will adjust the autonomous base point.
I do go ahead and record a rapid-static or static session to upload to opus later for peace of mind.
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David, so is it like Lee describes above - go to “Survey” – “data collection”, enter the point # that already exists in the job with proper SPC coordinates, take average readings on the point just like any other “control” location, and when you attempt to proceed with storing the point Survey Pro will prompt to adjust to that point numbers position?
I agree with the static logging to send to OPUS later on for QA/QC/Sanity check. And yes, job would be setup to be on proper state plane projection.
Thanks,
-Garry -
David, so is it like Lee describes above - go to “Survey” – “data collection”, enter the point # that already exists in the job with proper SPC coordinates, take average readings on the point just like any other “control” location, and when you attempt to proceed with storing the point Survey Pro will prompt to adjust to that point numbers position?
I agree with the static logging to send to OPUS later on for QA/QC/Sanity check. And yes, job would be setup to be on proper state plane projection.
Thanks,
-GarryBasically but go to “Survey” and “Start GPS survey”. Data Collection is for after you’ve localized.
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Ok, so it’s during the “Start Survey” process for rover configuration? I don’t remember an option to go occupy a known point during rover configuration. I know it searches for your base and after it finds your base you enter/verify rover height and click “Finish” – at least that’s what I’m used to doing right now. I’ll have to take a closer look next time I have GPS setup and have the time to test it.
Thanks,
-Garry -
David, so is it like Lee describes above - go to “Survey” – “data collection”, enter the point # that already exists in the job with proper SPC coordinates, take average readings on the point just like any other “control” location, and when you attempt to proceed with storing the point Survey Pro will prompt to adjust to that point numbers position?
I agree with the static logging to send to OPUS later on for QA/QC/Sanity check. And yes, job would be setup to be on proper state plane projection.
Thanks,
-GarryBasically but go to “Survey” and “Start GPS survey”. Data Collection is for after you’ve localized.
Also, I was assuming you were starting a fresh new job and wanting to convert it to SPC. If you have a SPC job already loaded, still similar steps, but make sure you don’t adjust the current job to one observation. You will be given the choice.
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Ok, so it’s during the “Start Survey” process for rover configuration? I don’t remember an option to go occupy a known point during rover configuration. I know it searches for your base and after it finds your base you enter/verify rover height and click “Finish” – at least that’s what I’m used to doing right now. I’ll have to take a closer look next time I have GPS setup and have the time to test it.
Thanks,
-GarryIt’s after clicking “finish” not during rover configuration. The next screen prompts to collect control. Again, this is with V 4 so it might not be exactly the same but I’d bet somewhat.
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Dave,
After I finish rover configuration the data collector does jump to the “data collection” screen.
Williwaw – Thanks, I’ll take a look.
-Garry
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It takes a couple of minutes but you can simply calculate the base point. Once you locate the good point, inverse between it’s located position and the record position, then calculate the correct position for the base using the inverse by reversing the numbers. Restart the base with the correct point and check into the SPC point, it doesn’t take very long, not as fast as pushing the button.
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Ok, I peaked through the manual (pages 65 – 69 as per link above) and it sounds like you can “Solve a Calibration” to “One Point”, but then on page 69 at the bottom it says: “NOTE: You can set only one new autonomous base position in each job.” This seems odd, because I could in theory do what I want all across the project area (think of an 8 to 10 mile long utility line across terrain with ridges and valleys blocking satellites, radio signal, and cell coverage) where the need for your base location could vary wildy – contractor has you hop here and do this, hop over there and do that, etc. (I realize having control setup more suitable to this environment from the beginning is the true answer.)
I tried going through the menus but can’t get very far because I don’t have a connection to a receiver nor a GNSS survey started. I’ll have to try it when I get a chance in the field next time. One thing I’m not familiar with though is the term “GNSS Control Point”. Do I have to tell the data collector that certain points ARE GNSS control points? Because as far as I know, those “known SPC points” aren’t in the data collector any differently than the rest of my points.
-Garry
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It takes a couple of minutes but you can simply calculate the base point. Once you locate the good point, inverse between it’s located position and the record position, then calculate the correct position for the base using the inverse by reversing the numbers. Restart the base with the correct point and check into the SPC point, it doesn’t take very long, not as fast as pushing the button.
Yeah, it sounds like your describing what I mentioned previously as a regular “Adjust”-“Translate” routine to translate just your autonomous base point and a rover location point on the point you want to use to translate to SPC. Translate rover location point to the proper held SPC point, then I assume “Start Survey” again with base on known new point (though I wonder if the software will prevent you from translating the point your base is setup on). Now that I look at the “Adjust” menu I also see “Fix Station Setup” which allows translation/rotation of unkown to known. I wonder if this works for what I am attempting to do without going through a “Solve Calibration” routine?
-Garry
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Watch out for translating your base because it will also translate the geodetic coordinates for your base along with the grid coordinates and it can really get things goobered up in a hurry. If you decide to go that route use the point and direction to create a new point for the base using the inverse for the tie to the point you want to calibrate to and then completely delete the setup data for your original autonomous base position and just start the survey over using the calculated point for the base’s location as a known point. It’s easier and safer to use the ‘solve calibration’ routine IMHO. I’ve mangled these before using SP and it no fun trying to figure out what happened. When you start a survey with the base over a ‘known point’, you are effectively doing a single point calibration as the software will assign the autonomous GP position to that grid coordinate.
Willy -
It takes a couple of minutes but you can simply calculate the base point. Once you locate the good point, inverse between it’s located position and the record position, then calculate the correct position for the base using the inverse by reversing the numbers. Restart the base with the correct point and check into the SPC point, it doesn’t take very long, not as fast as pushing the button.
Yeah, it sounds like your describing what I mentioned previously as a regular “Adjust”-“Translate” routine to translate just your autonomous base point and a rover location point on the point you want to use to translate to SPC. Translate rover location point to the proper held SPC point, then I assume “Start Survey” again with base on known new point (though I wonder if the software will prevent you from translating the point your base is setup on). Now that I look at the “Adjust” menu I also see “Fix Station Setup” which allows translation/rotation of unkown to known. I wonder if this works for what I am attempting to do without going through a “Solve Calibration” routine?
-Garry
I wouldn’t call it translating. It’s simply a first principal calculation, no need for programs, or adjustments. Basically you go to the field with your DC preloaded with the point you need to use for SPC, and a state plane projected file with that point in it, call it point #2. For some reason you don’t want to occupy #2. You set up at a secure random location over a point you set on the ground. You start the base using an autonomous position so you already know you aren’t quite on SPC just a few feet off probably, I will usually call that base point XXX. You go to #2 and locate it call that RTK position #3. Inverse from 3 to 2, it shows something like 25d, 5′, -6′. You need to move point #3 North 25d East, 5 feet, and down 6 feet vertically. You calculate a new point for the base from XXX using 25d, 5feet, and -6 feet, call that point #10. Then you stop the survey at the base, leave the receiver on and restart it over point #10. Go to #2 and check in. You are ready. Delete XXX and #3 they served their purpose and are no longer needed if you check in.
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