Least Squares Adjustment Program (Land Surveying)

by Darrell Andrews @, Central Florida, Friday, February 04, 2011, 10:12 (1580 days ago)

Are there any GOOD Least Squares Adjustment programs that I can download for FREE?

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Yes, But You Cannot Use Them Commercially

by Paul in PA @, Friday, February 04, 2011, 10:23 (1580 days ago) @ Darrell Andrews

Paul in PA

Yes, But You Cannot Use Them Commercially

by Darrell Andrews @, Central Florida, Friday, February 04, 2011, 10:24 (1580 days ago) @ Paul in PA

I won't tell on you!

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Least Squares Adjustment Program

by DEREK G. GRAHAM OLS OLIP ⌂ @, North Aboyne Farm (Elora Ontario Canada), Friday, February 04, 2011, 10:25 (1580 days ago) @ Darrell Andrews

Darrell- Maybe http://www.microsurvey.com/products/starnet/download_form.php

Cheers

Derek

--
"Tiz in the flux of patience that the ever vigilant is buoyed"

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Least Squares Adjustment Program

by Moe Shetty ⌂ @, Baltimore, HARM CITY, Maryland., Friday, February 04, 2011, 10:38 (1580 days ago) @ DEREK G. GRAHAM OLS OLIP

not as easy as star net. but free, good ,right, etc.
some programs compute 100 station, other module even more:

http://surveying.wb.psu.edu/psu-surv/free.htm

good for learning, but again, don't use commercially

--
Eddie Glawe, LS #21391 Maryland

Least Squares Adjustment Program

by Joe M ⌂ @, MI, Friday, February 04, 2011, 10:40 (1580 days ago) @ Darrell Andrews

It seems like everyone forgets that Star*NET has a demo mode. Maybe because before MicroSurvey bought the program this past year, there wasn't even a website for it. Download the full version of the program and run it in DEMO mode. The only restriction is that you are limited to 10 points when you perform an adjustment. It should otherwise be functionally equivalent to the "Professional" version of the program (although, I notice that the converters seem to be disabled as well, but these didn't use to be included as a regular part of Star*NET before it was purchased by MicroSurvey anyway). You can still learn and do a hell of a lot with it. Maybe you will find it useful enough to buy a copy. I have to wonder how many people know about this and will find it useful?

http://www.microsurvey.com/helpdesk/index.php?_m=downloads&_a=viewdownload&down...

Least Squares Adjustment Program

by Darrell Andrews @, Central Florida, Friday, February 04, 2011, 10:52 (1580 days ago) @ Joe M

Yeah, I am considering Microsurvey and Star*NET, but for now, I need something that can handle more than 10 points and doesn't rape my wallet.

This will be my first attempt using a Least Squares program, so it will be educational! Usually, the amount of work I have doesn't require it, but I have a bunch of control points in a job I want to test the concept on.

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Least Squares Adjustment Program

by RADAR ⌂ @, Puyallup WA, Friday, February 04, 2011, 10:55 (1580 days ago) @ Darrell Andrews

You can download a free version of survce for your desk top from Carlson. But I don't know if you can do LSA with it.

HTH
Radar

--
I never did a day's work in my life. It was all fun.--Thomas A. Edison



Citius, altius, fortius

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Least Squares Adjustment Program

by Ladd Nelson ⌂ @, Iowa, Friday, February 04, 2011, 13:18 (1580 days ago) @ RADAR

You can download a free version of survce for your desk top from Carlson. But I don't know if you can do LSA with it.

The desktop emulator version of Carlson SurvCE does not have a LSA engine in it. Carlson does offer, however, a Least Squares Adjustment program called SurvNET. A 30-day evaluation version of the product can also be requested.

--
Ladd Nelson
[image]

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Least Squares Adjustment Program

by RADAR ⌂ @, Puyallup WA, Friday, February 04, 2011, 13:28 (1580 days ago) @ Ladd Nelson

Thanks Ladd, I knew it was something like that;-)

Cheers,
Radar

--
I never did a day's work in my life. It was all fun.--Thomas A. Edison



Citius, altius, fortius

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Least Squares Adjustment Program

by Dave Karoly, Sacramento, CA, Friday, February 04, 2011, 15:54 (1580 days ago) @ RADAR

I like SurvNet which I own a copy. The conventional data entry is really easy if you own Carlson SurvCE.

I like that it doesn't need provisional coordinates or bearings to get started like Star*Net does although the Star*Net dot DAT file format is easier to use.

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Free Least Squares Adjustment Program

by Paul in PA @, Friday, February 04, 2011, 11:21 (1580 days ago) @ Darrell Andrews

The link to Penn State for the LS program is the Wolf-Ghilani LS program that is included with their Least Squares adjustment text. I first used it as a DOS program that came with an early Wolf-Ghilani Elementary Surveying text. Subsequently I bought the LS text with a Windows version. I have submitted the exact same data to that program as to full blown Star Net with equal results. It is worth downloading and is an excellent learning tool.

Truth be told, I have yet to find it necessary to do a Least Squares adjustment of any of my actual surveys. I am so satisfied with my field traverse techniques and results that I can accept any included error as within my error budget. I make enough redundant measurements and checks with GPS that LS would only change the numbers, but in essence not change the facts. I do however have blunders that require reobservations and I do that. I would rather spend extra time in the field than chasing miniscule numbers in the office.

My GPS software does an LS adjustment because that is the only way it can output data. I accept that without complaint. I have set up traverses that would allow me to do a check with GPS and found at the end of the traverse that the check step is unnecessary.

You can use Least Squares to massage a pile of doggy doo and you will have a nice neat pile of doggy doo. Notice however that it is still doggy doo.

Paul in PA

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Free Least Squares Adjustment Program

by Dave Karoly, Sacramento, CA, Friday, February 04, 2011, 11:42 (1580 days ago) @ Paul in PA

The primary purpose of LS is not to adjust things.

I think of it as a processing tool. It is a way to process all your measurements simultaneously to get the best results.

You can get coordinates out of a static network without doing LS but no one does because it is so simple to do.

If you put all of your measurements into one big adjustment you get a better answer, in my opinion. Also full LS allows you to use all of your tools to best advantage. For example you can close your conventional traverse with a static vector rather than being forced to have a closed GPS survey and a closed conventional survey. LS allows you to use all of your tools to get the measurements you need in any way that is most efficient for you.

Free Least Squares Adjustment Program

by Plumb Bill @, Friday, February 04, 2011, 13:09 (1580 days ago) @ Paul in PA

You cannot in good faith satisfy ALTA, most state board, and high-accuracy stakeout requirements without LS data for the control and observations.

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Least Squares Adjustment Program

by Peter Ehlert ⌂ @, BC, Mx, Friday, February 04, 2011, 11:46 (1580 days ago) @ Darrell Andrews

The price if Star*Net could not be considered rape.
Star*Net has a multitude of uses, best tool in my bag of technical tricks.

Why waste days learning some funky dunkey package?
But, you know the value of your own time and effort best :-)

Seriously, get the demo and work with it a bit.

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Least Squares Adjustment Program

by Bill93 @, 52402, Saturday, February 05, 2011, 10:22 (1579 days ago) @ Peter Ehlert

I looked at the Star*Net demo. The first thing I noticed was the order of points in their angles. Geometry classes have given angles from-at-to for decades if not centuries. Why would Star*Net use at-from-to ?? Is that typical of many surveying software packages?

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Least Squares Adjustment Program

by Dave Karoly, Sacramento, CA, Saturday, February 05, 2011, 10:24 (1579 days ago) @ Bill93

I think you can use a different order, at-from-to is just the default. I think it is more in line with how Surveyor's think vs mathematicians. I use the default because the converter makes the file that way.

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Least Squares Adjustment Program

by Peter Ehlert ⌂ @, BC, Mx, Saturday, February 05, 2011, 13:52 (1579 days ago) @ Dave Karoly

I stumbled and fumbled and grumbled at the free form data entry format with Star*Net at first, but after the learning curve I found it very intuitive and powerful. Extremely versatile.
I sincerely hope it is properly maintained under new ownership, maybe I could even dream of a linux version too.;-)

Least Squares Adjustment Program

by Loyal @, Evanston, Wyoming, Friday, February 04, 2011, 11:01 (1580 days ago) @ Darrell Andrews

COLUMBUS!!!

It isn't "FREE" (although there is a free DEMO), but it won't "rape" your wallet.

$725 is a GREAT price for a Program with COLUMBUS' power and ease of use.

http://www.bestfit.com/prac_outliers.shtml

Loyal

Least Squares Adjustment Program

by Joe M ⌂ @, MI, Friday, February 04, 2011, 11:03 (1580 days ago) @ Loyal

I like that it seems to import OPUS and OPUS-RS solutions. Now what would I do with this...

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Least Squares Adjustment Program

by Dave Karoly, Sacramento, CA, Friday, February 04, 2011, 16:57 (1580 days ago) @ Loyal

That sounds like a great deal at $725 to be able to do conventional and GPS together.

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Least Squares Adjustment Program

by Corey Diekman, Black Hawk, CO, Friday, February 04, 2011, 11:08 (1580 days ago) @ Darrell Andrews

Does not your GPS processing software (LGO, TGO, Topcon Tools etc.) have adjustment functions? Assuming you are needing it for GPS. Civil 3d has this as well, but I hear it sucks and it's DEFINITELY not easy on the wallet.

I use LGO, it's not that pricy for the processing and adjustment modules. Sorry, I know this was not what you asked but just curious.

--
Corey J Diekman, PLS, CFedS, etc.
a.k.a. Corner Stone

Least Squares Adjustment Program

by Darrell Andrews @, Central Florida, Friday, February 04, 2011, 11:18 (1580 days ago) @ Corey Diekman

No GPS here. Old school survey techniques!

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Least Squares Adjustment Program

by Corey Diekman, Black Hawk, CO, Friday, February 04, 2011, 11:23 (1580 days ago) @ Darrell Andrews

No GPS here. Old school survey techniques!

Ah. I do use LGO for my conventional adjustments as well. Not free like you're looking for though. Good luck with that!;-)

--
Corey J Diekman, PLS, CFedS, etc.
a.k.a. Corner Stone

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Least Squares Adjustment Program

by GeeOddMike ⌂, Florida, Friday, February 04, 2011, 12:32 (1580 days ago) @ Darrell Andrews

FWIW,

The NGS has a venerable package ADJUST that is free, rigorous and is distributed with sample data and guidelines. I consider it a good tool to learn about adjustments. I provides rich numeric output allowing close scrutiny of the processing and results.

That said, creating the input files (constraints and parameters, a priori positions and observations) for your data might be more trouble than you want. Also running the various steps in the process are all command line operations.

There is even a NOAA TM 47 describing the program and its use.

Download page is:here

The information below was copied from that page.


ADJUST_ALL [2011/01/04] Download a zip file with all PC executables, support files and documentation. Does not contain source code files.

DOWNLOADS:
adjust_all.zip contains the Adjust suite of programs for the PC.

ADJUST [version 5.6 - 2008/10/27] Performs least squares adjustment on horizontal, vertical angle, and GPS observations.

DOWNLOADS:
adjust.exe is the PC executable.
adjust_suppl52.zip contains supplemental documentation for versions 5.2 and later
samples.zip has sample data files, common to adjust, chkobs, obschk, obsdes
adjust_v56.zip contains program source code

Constrained Adjustment Guidelines -- (2010/03/04) recommended adjustment procedures and step-by-step approach for adjusting GPS projects.


Enjoy,

DMM

Least Squares Adjustment Program

by Joe M ⌂ @, MI, Friday, February 04, 2011, 12:41 (1580 days ago) @ GeeOddMike

This is definitely a bad first LSA program. I even took a 5 days NGS PAGES and Adjust seminar, and wouldn't recommend these programs to anyone...

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Least Squares Adjustment Program

by Cliff Mugnier ⌂ @, Baton Rouge, Louisiana, Saturday, February 05, 2011, 14:51 (1579 days ago) @ GeeOddMike

Some 11-12 years ago, one of my Ph.D. students used "ADJUST" to do an adjustment of all 20th century surveys of the Island Nation of Niue in the South Pacific. The (young) staff at NGS at the time did not know what a "traverse" was, and after he educated them over the telephone, they were able to fix a number of bugs in the source code.

He did have to write a number of his own routines to help with the formatting and processing, but he's now a Senior Scientist at the Naval Research Lab.

--
Cliff Mugnier
Surveying, Geodesy, & Photogrammetry
LOUISIANA STATE UNIVERSITY

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Least Squares Adjustment Program

by John Hamilton ⌂ @, Pittsburgh, PA, Friday, February 04, 2011, 12:49 (1580 days ago) @ Darrell Andrews

I find it hard to believe that every surveyor does not have a good least squares adjustment program (and is not proficient in its use). To me it is an absolutely indispensable tool. I would no more think of looking for a free LS program than I would try to get some free knives if I were a surgeon. Maybe this is indicative of the state of our profession...

This is not a personal attack on Darrell. I just think that a LS program is a fundamental tool that all surveyors should be using.

I use Geolab, and it has worked for many years for me. Very powerful. But, it does have a few bugs and is basically a dead program (i.e. no one is updating it). I have used Star*Net, but do not have it now. I didn't like it because it does things in 2D/1D rather than ECEF as Geolab does. I also have Columbus, but my way of operating is to write my own input files, and I have had problems doing that with Columbus. To be honest I have not spent a lot of time messing with it, but the ASCII text files that I made didn't work, and I haven't had time to try to fix them. Let's just say I have problems with it.

I have been interested in MOVE3, because, like Geolab, it does true 3-D adjustments. It also has capability to put in constraints like collinearity, parallel lines, perpendicular lines, etc. It is expensive, $2499. But, I believe that is in the range of what I paid for Geolab many years ago. If it works well, I am willing to spend that to get a really good program with good support. I use a least squares program way more than I use CAD, but that is because of the peculiar types of projects that I do. I downloaded the MOVE3 demo today, and tried to load a small GPS net, but it exceeds the limits of the demo (not sure what the limits actually are). They do have an option for $149 for a 60 day trial version.


I do use ADJUST from NGS, but only for GPS and only on projects which I submit for bluebooking. Not at all hard to use ONCE you get the input files correct (B files and G files).


I should add that I write a lot of software, and it is very time consuming and tedious at times. Good software is worth paying for.

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Least Squares Adjustment Program

by Martin F ⌂ @, Vancouver, BC, Canada, Friday, February 04, 2011, 13:00 (1580 days ago) @ John Hamilton

I use Geolab, and it has worked for many years for me. Very powerful.

We also use Geolab (from BitWise Ideas), and (although i don't use it myself) i think we have similar comments to make about it.

Also, Copan (the free CoGo program from UGL) can output field files to Geolab's IOB format.

Least Squares Adjustment Program

by Darrell Andrews @, Central Florida, Friday, February 04, 2011, 13:33 (1580 days ago) @ John Hamilton

I find it hard to believe that every surveyor does not have a good least squares adjustment program (and is not proficient in its use).

Well, don't mind me. I am learning! :-D

To me it is an absolutely indispensable tool.

Am sure it is; the reason why I want to learn it.

I would no more think of looking for a free LS program than I would try to get some free knives if I were a surgeon.

I am considering new CAD software since what I have is antiquated, and I have heard a lot of good things about Star*NET. However, I come from a generation that feels knowledge should be free and accessible for the most part. I understand that software engineers work hard on code; I at first went to college for Computer Engineering and know how tedious it can be to parse through code. I will gladly pay for a full professionally made software package when I decide on it, and only when the funds allow it. Work has picked up some, but not enough to drop a few thousand down.

Maybe this is indicative of the state of our profession.

Not really. It is, however, more indicative of the emptiness of my wallet! :-)

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Least Squares Adjustment Program

by John Hamilton ⌂ @, Pittsburgh, PA, Friday, February 04, 2011, 14:07 (1580 days ago) @ Darrell Andrews

Darrell: The problem with a lot of demos is that they are very limited in what they can adjust. If I don't have the software lock installed for Geolab, it works in demo mode, which I think is 10 stations. Most stuff I do is larger than that. I transfer the Geolab software key back and forth between my laptop and my desktop, and every once in a while I forget..., so it won't let me go any further.

Like I said, it wasn't a personal attack on you, I was just surprised that no one else said it was a critical tool. I admit that I probably use least squares more than most because of GPS, deformations, etc, but I still consider it a very important tool.

I remember attending a presentation at an ACSM many years ago by a surveyor from California (last name Frank, maybe?) who used least squares (Star*Net I think it was) for boundary analysis. I like to think of LS as a "measurement cruncher". Even if I have non-redundant measurements (i.e. a radial total station shot or a radial GPS vector), I like to run it through the LS program along with the redundant measurements so that all of the data is computed together.

Good luck in your search.

Least Squares Adjustment Program

by Dave Lindell @, Pasadena,CA, Friday, February 04, 2011, 15:49 (1580 days ago) @ John Hamilton

John, that was probably Roger Frank from Johnson-Frank Associates.

They did a large boundary job where Los Angleles, Orange and San Bernardino counties come together, Sleepy Hollow I think it's called. It was writen up in one of the survey magazines.

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Least Squares Adjustment Program

by BruceRupar @, Wood County, Texas, Saturday, February 05, 2011, 04:27 (1579 days ago) @ Darrell Andrews

Darrell,
I feel your pain, wallet wise. Have you looked at Carlson's Simplicty "Sight" Survey ? It includes SurvNET, plus handles all your CAD needs for under $1000.

Just a thought,
Bruce

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GeoLab is alive and well

by Cliff Mugnier ⌂ @, Baton Rouge, Louisiana, Saturday, February 05, 2011, 14:52 (1579 days ago) @ John Hamilton

LSU has a "freebie" license from Canada for the current version.

--
Cliff Mugnier
Surveying, Geodesy, & Photogrammetry
LOUISIANA STATE UNIVERSITY

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Least Squares Adjustment Program

by Martin F ⌂ @, Vancouver, BC, Canada, Friday, February 04, 2011, 12:53 (1580 days ago) @ Darrell Andrews

Some (possibly out-of-date) info:
Global Cogo has DOS Burkord and WBK, both free.
Sayed R Hashimi (SRH) has Ez-Adjust, and Convergent Computations has Geoida, both under $400.
Don't know if they're "good" enough for you.

Least Squares Adjustment Program

by Plumb Bill @, Friday, February 04, 2011, 13:13 (1580 days ago) @ Martin F

What is the name of that super-expensive metrology adjustment software that Falk uses?

Least Squares Adjustment Program

by William D., Friday, February 04, 2011, 16:50 (1580 days ago) @ Plumb Bill

Have you looked at New Mexico State's software?

http://web.nmsu.edu/~kwurm/Software.html

Least Squares Adjustment Program

by MLSchumann, Friday, February 04, 2011, 21:21 (1580 days ago) @ Darrell Andrews

CMM, written for BLM by Ray Hintz at the University of Maine, includes Least Squares Adjustment. To my knowledge, because the taxpayers paid for it, there are no additional charges. Input is not too difficult, nearly as easy as Star*Net. It doesn't have all the bells and whistles Star*Net has but, it covers the basics very well. There's both a horizontal network adjustment and a vertical adjustment package. It takes a little effort in the instructions to find the least squares discussion. Once found, you should not have too much difficulty and you'll get reliable results.

See post:
by William D., Friday, February 04, 2011, 16:50 (4 hours, 21 minutes ago) @ Adam3000i

Have you looked at New Mexico State's software?

http://web.nmsu.edu/~kwurm/Software.html

Least Squares Adjustment Program

by jlwahl, Saturday, February 05, 2011, 12:08 (1579 days ago) @ Darrell Andrews

If you are mostly wanting to learn then Ghilani's program is probably about the easiest to get install and learn. It is for educational purposes only, and I am not sure what other limits it has as far as size of networks etc. My recollection is that it is not severely limited. It can be downloaded here:

http://surveying.wb.psu.edu/psu-surv/free.htm

CMM is available in a number of forms. CMM is mostly a DOS era program that will run on machines up through XP. It may be considered slightly more cryptic in its use but has been used on literally 1000's of jobs in BLM. It could be useful as a learning tool also.

It does NOT have a pretty windows interface but if one is learning or willing to dig a little to learn, it can be a workhorse. It is also not just a plane survey adjustment package, as it can deal with geodetics fairly well using the SPC systems fairly rigorously applied. It was also not primarily designed as a least squares package so there are a lot of other aspects of it beyond that scope dealing with PLSS applications. It was also not designed to compete with commercial programs.

Email me if you want more info. A google search should find me fairly easily.

- jerry wahl

PS. Initial experiments with Ghilani's program for traverses seems to indicate a limited number of options for how the traverse is set up, and it does not immediately appear to me to do networks, but basic loops. It has a ton of other functions and utilities in it and is probably all related to his text books.

Least Squares Adjustment Program

by PY001, Thursday, October 04, 2012, 14:41 (972 days ago) @ jlwahl

I currently use CMM and now have a 64 bit computer. CMM does not work with this set up. Has anyone found a fix for this.

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Least Squares Adjustment Program

by Norman Oklahoma ⌂ @, Portland, Oregon, Thursday, October 04, 2012, 15:46 (972 days ago) @ PY001

Virtual Machine

--
Lord, help me be the person my dog thinks I am.

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