Re: Topodroid

[Marco Corvi]

On Fri, Mar 13, 2026, 08:57 Domen Mahne <domen...@gmail.com> wrote:

Hello,

I have a few quick questions for you.

1. When I add coordinates to a station, the altitude is displayed correctly (geoid). When I export to survex and I open the file, the altitude is higher. Why is that?

probably that is the ellipsoid height.

does survex requires the geoid height ?

let me know.

 

2. Would it be possible to add a much louder sound on leg recognition, or a longer louder beep, so it's easily heard?

volume is a setting.

i may add a setting for the length.

Thanks for your answers.

Have a great day,

Domen

V V pet., 13. dec. 2024 ob 14:35 je oseba Domen Mahne <domen...@gmail.com> napisala:

Aaah, I see. Yes, that's really stupid. I tried a different file manager and it worked.

Of course now I have to manually put in the station IDs from memory. But that's logic, because bric can't know where the shot was taken from and to.

Thanks and have a nice weekend,

Domen

V V pet., 13. dec. 2024 ob 14:18 je oseba Marco Corvi <marco...@gmail.com> napisala:

because the file manager you use filters the files:

those that are filtered out are greyed out.

it's a stupid behavior taken from windows: it shows all files but let you pick only certain files, pretending to help the user by doing so.

and the file manager has no option to bypass this behavior.

On Fri, Dec 13, 2024, 11:38 Domen Mahne <domen...@gmail.com> wrote:

Hi,

I am trying to import the bric csv of the "failed survey" into topodroid, but it's greyed out and I can't select it. Do you know why this is?

Best regards,

Domen

V V pon., 9. dec. 2024 ob 11:29 je oseba Domen Mahne <domen...@gmail.com> napisala:

Yes, I like the option for Topodroid to take of id numbers, instead of bric.

Ok, I roughly understand what you mean.

Yes, it's weird that it happens only after some time. It's true though that during the first attempt the phone was tucked away. During the second survey I was unlocking the phone oftenly to check if it's working and at some point I wasn't looking at the phone anymore. It could be that somewhere at that time the execution environment started to have issues with the data.

I can downgrade topodroid to the previous version as this never happened before. On the other hand I just bought a new phone and maybe it'll work differently due to the newer android version.

Ok, I understand. I will then manually copy the data to save the survey.

Thanks for your help.

V V tor., 3. dec. 2024 ob 22:07 je oseba Marco Corvi <marco...@gmail.com> napisala:

thanks.

it seems that the log has nothing to do with your survey (the shot id numbers are different).

the bric data-file has more shots than the topodroid file.

as you described, the bric sent the data, but they did not arrive to the app.

or the app did not recorded that in the survey database - could not record them.

the error message could have been about this.

too bad you could not catch it.

it is possible, although very unlikely that the data sent by the bric do not get to the app, because  the bric talks with the android system and not with the app.

as several data were lost, it means that the BT communication bric-android was active although the app was no longer attached to the BT.

this is wierd, but, given the way code is executed on android, i would not rule it out.

in other words: i cannot see how it could happen, other than by an error in the app execution environment.

the bric communication has not changed for long time.

however i cannot excluded that there may have been a change in a file that has indirect effects on the bric communication.

on the other hand it is strange that this shows up after some shots have been downloaded.

in conclusion, i can think of three possible points of failure

(1) topodroid storing data in the db

(2) android runtime

(3) an indirect effect on bric communication.

with the data and info i have i dont know what to do.

wait for further evidence on the issue.

On Tue, Dec 3, 2024, 20:39 Domen Mahne <domen...@gmail.com> wrote:

Here you go.

V V tor., 3. dec. 2024 ob 17:17 je oseba Marco Corvi <marco...@gmail.com> napisala:

can you send me

(1) the topodroid zip of the survey

(2) the data file that is the bric memory ?

thanks

On Mon, Dec 2, 2024, 09:41 Domen Mahne <domen...@gmail.com> wrote:

Hi Marco,

This weekend I was surveying a cave and I came upon some issues that I've never seen before. The first thing was when I started the survey everything was fine. I was teaching my friend to survey, so we only did lrud and main shots between stations. At the fourth station I looked at the survey on my phone and noticed there were only 4 shots, instead of 21 (4x lrud + 3x triple shot). There was also a quick error message when I opened the app, but I couldn't read it in time. We then started the survey from the beginning and everything was fine. At some point I noticed that the app stopped downloading data from the BRIC4. I continued this way to the end. On the BRIC4 it says that all of the data is sent to Topodroid, but in reality the data was not transferred I guess.

The only change from my recent surveys is that I upgraded Topodroid to 6.2.95-35. Is there maybe an issue with the connection and the information on when the data is actually downloaded?

Phone info:

Huawei P30 Pro (model VOG-L29, EMUI 12), Android 10

Survey device: BRIC4

In the worst case I can still save the survey by manually entering data from the BRIC4 to Topodroid.

I'm attaching the log, but from what I see, the new data wasn't added to it (judging from the lack of current version text).

Best regards,

Domen

V V tor., 26. mar. 2024 ob 14:35 je oseba Domen Mahne <domen...@gmail.com> napisala:

Ok, then it's a good idea to check the app every now and then during the survey.

Ok, I will try to remember to rename the log file, if this happens again. And I'll try with a test survey to see if nothing is deleted.

I also figured out just now how to quickly select a large number of splays by highlighting one and long pressing on the right side of the last desired shot and then bulk change the station number.

I'll use this function to change the splays of the mentioned survey so that it's not skipping station numbers.

V V tor., 26. mar. 2024 ob 13:54 je oseba Marco Corvi <marco...@gmail.com> napisala:

On Tue, Mar 26, 2024, 12:49 PM Domen Mahne <domen...@gmail.com> wrote:

No problem in providing you with feedback.

I see it can be quite hard to locate the exact cause of the problem.

Ok. Do you mean to force close the app before a survey trip or during the survey, if I notice this problem?

during the survey.

close the survey first.

then force close the app.

before restarting the app, rename the log.txt file.

this is not really necessary, because the log file is not overwritten, but it is easier to inspect small files.

I guess it's no harm to force close before the survey, just in case it helps.

you can try with a test survey that the data and sketches are not lost.

when you close the survey everything is saved to disk (indeed the survey data are saved as soon as they arrive, and the sketch every few minutes or so, if it has been modified)

Thank you for your help. If I notice anything else, I'm more than happy to let you know.

Best regards,

Domen

V V pon., 25. mar. 2024 ob 10:22 je oseba Marco Corvi <marco...@gmail.com> napisala:

Thanks for your feedback,

this issue of advancing station numbers by 2 and leaving splays in the middle occurred

already now and then. I investigated the code very carefully and i got convinced

that it is due to jit (just-in-time) compilation of the java code by the Android runtime.

I tried to address it by moving the number increment to native code, but apparently 

your log.txt shows that the cause of the problem is not  there, or not only there.

So the issue remains open.

A work-around, from the user point of view, is to close the app (maybe force-close

it through the Settings app) and restart the app.

Thanks again for your feedback.

With it i am going to improve the messages that will help to pin down the problem.

marco

 

On Sun, Mar 24, 2024 at 7:54 PM Domen Mahne <domen...@gmail.com> wrote:

It's Huawei P30 Pro. (model VOG-L29, EMUI 12).

Thank you for your help :)

V ned., 24. mar. 2024 19:50 je oseba Marco Corvi <marco...@gmail.com> napisala:

thanks.

what is your android?

make and model - i need the architecture of your android

On Sun, Mar 24, 2024, 4:23 PM Domen Mahne <domen...@gmail.com> wrote:

Here you go.

V ned., 24. mar. 2024 09:56 je oseba Marco Corvi <marco...@gmail.com> napisala:

if you can  find the file

 /sdcard/Android/data/com.topodroid.TDX/Files/log.txt

please send it to me

On Sun, Mar 24, 2024, 8:08 AM Domen Mahne <domen...@gmail.com> wrote:

Hello,

I experienced something odd during the latest cave survey. I was surveying like I always do, without changing stations on my phone, and during the end of the trip I notices that when doing the triple shot, the station numbers do not match the splays. And after a new station, the new splays also do not match and it jumped one number ahead (attached screenshot).

Do you know why this happened? I also use my phone to take some pictures during the trip. Maybe this caused the problem? I doubt it though, because as seen, the connection to BRIC was never lost.

I will save the data by manually changing station and splay numbers, but I would like to know if I did something wrong to cause this.

Thank you for your help.

Best regards,

Domen

V sre., 5. okt. 2022 14:20 je oseba Domen Mahne <domen...@gmail.com> napisala:

Thank you so much. I updated and it works great.

Really appreciate it.

Best regards,

Domen 

V sre., 5. okt. 2022 13:55 je oseba Marco Corvi <marco...@gmail.com> napisala:

thankyou,

no problem with the 3d.

get the latest version: info on google play app page

On Wed, Oct 5, 2022, 1:16 PM Domen Mahne <domen...@gmail.com> wrote:

Here you go.

V sre., 5. okt. 2022 13:07 je oseba Marco Corvi <marco...@gmail.com> napisala:

yes please, send me the zip archive.

thanks

On Wed, Oct 5, 2022, 1:03 PM Domen Mahne <domen...@gmail.com> wrote:

Yes, it's odd because it's not a complex survey at all.

Do I have outdated versions od cave3d and topodroid?

If you need, I can send you the survey to investigate.

V sre., 5. okt. 2022 12:48 je oseba Marco Corvi <marco...@gmail.com> napisala:

i have no idea.

one should debug the app with the survey that crashed the 3d.

google play versions are long outdated (1.5 year).

On Wed, Oct 5, 2022, 12:28 PM Domen Mahne <domen...@gmail.com> wrote:

Topodroid 5.1.40

Cave 3D 4.0.33

Android 12

V sre., 5. okt. 2022 12:24 je oseba Marco Corvi <marco...@gmail.com> napisala:

versions of app and android ?

On Wed, Oct 5, 2022, 12:19 PM Domen Mahne <domen...@gmail.com> wrote:

Hello,

I have a question about Cave3D. I have a problem with a recent survey, which has about a 1000 splays and 20 legs. When I select 3D option in Topodroid, the app crashes. This is the second time I had this happen. I have a few more compley surveys and Cave3D works flawlessly, also computing the walls with no problems.

Do you happen to know what could be the culprit for this or how to fix it?

Thank you for your help,

Domen 

V pon., 4. jul. 2022 21:06 je oseba Domen Mahne <domen...@gmail.com> napisala:

Thanks for the info. It's really a pleasure using the app because it has so much functionality.

Thank you again for taking the time to answer my questions.

Best regards,

Domen

V V pon., 4. jul. 2022 ob 07:58 je oseba Marco Corvi <marco...@gmail.com> napisala:

bric sends three "messages" for each shot. the primary message contains the usual data (length compass clino), and is enough for surveying.

the other messages contain additional information about the shot.

if you select all, topodroid does not store a shot unless all three messages are received.

it is usually safe to select "all".

On Sun, Jul 3, 2022, 8:31 PM Domen Mahne <domen...@gmail.com> wrote:

Thank you! So I should select all exept index? What is primary only? 

V ned., 3. jul. 2022 20:29 je oseba Marco Corvi <marco...@gmail.com> napisala:

yes

On Sun, Jul 3, 2022, 8:27 PM Domen Mahne <domen...@gmail.com> wrote:

Hi, is this the setting you are talking about? (attachement). 

Thanks. 

V ned., 3. jul. 2022 19:36 je oseba Marco Corvi <marco...@gmail.com> napisala:

you can set the app not to use the shot id passed by the bric.

(this setting is not in old app versions)

On Sat, Jul 2, 2022, 12:37 PM Domen Mahne <domen...@gmail.com> wrote:

Hello, 

I am sorry for bothering you again. I have a question about shot IDs. So I was surveying a cave and made more than 500 shots in total. In between this trip and the second, Bric4 was reset, so the reference shot numbers started from 1 again in the device. I marked the station I wanted to continue from, but because of the reference number from Bric4 it was not recording the shots in the right way. It was grouping them with the shots with the same shot id number. I managed to get around this by making a new survey and making 500+ blank shots, so that the reference shot number on the Bric4 was larger than in the survey. That worked, it was no longer interfering with the shot IDs.

My question is, is there a way to overcome this from the app, even if the Bric4 was reset? Maybe some option to bypass the reference numbers?

Thank you so much for your help, 

Domen

V pon., 27. jun. 2022 07:19 je oseba Domen Mahne <domen...@gmail.com> napisala:

I see, I finally understand how the projection on the vertical plane works. Thank you for your help, I also know now how to do the projected profile.

The app is truly amazing, great work. 

Best regards, 

Domen 

V ned., 26. jun. 2022 06:02 je oseba Marco Corvi <marco...@gmail.com> napisala:

topodroid, by default, "project" splays  on the vertical plane that contains the leg, but the user can force each splay drawn left or right.

there is also projected profile.

see the book "on statiom".

On Sat, Jun 25, 2022, 2:45 PM Domen Mahne <domen...@gmail.com> wrote:

Hello,

I have another question, if you would be so kind to answer it. I have completed a survey of a cave, which is in general vertical. In the middle it has a large pit, which is of an elipse shape (approximately 2m wide in one direction and 10m wide in the other). In profile view, the splays are oriented so that the less wide profile is visible. Is it possible to "3D rotate" sections or legs of the profile view so that the widest profile of the pit would be visible? I tried to play with setting the splays left or right but it doesn't help.

Thank you so much for your help. 

Best regards, 

Domen Mahne 

V pet., 17. jun. 2022 11:32 je oseba Domen Mahne <domen...@gmail.com> napisala:

Oh, I see, I understand now. Thank you for your help and fast response!

Best regards, 

Domen Mahne 

V pet., 17. jun. 2022 11:28 je oseba Marco Corvi <marco...@gmail.com> napisala:

domen,

the device measures shots, thus legs and splays. no lrud.

when you export your survey, topodroid can compute lrud and include them in the export.

the survey data in topodroid do not include lrud (although topodroid has splay classes)

marco

On Fri, Jun 17, 2022, 11:06 AM Domen Mahne <domen...@gmail.com> wrote:

Hello,

I am starting to learn the app with the new BRIC4. I managed to find out that if you take the same shot 3 times, the app automatically recognizes that as a leg shot, which is very handy. My question is, can the app recognize lrud measurements? So it wouldn't be necessary to enter them manually. Or is the practice to just use splay shots for everything?

The app is really great and thought out, great job!

Thank you for your help, 

Domen Mahne

[Marco Corvi]

On Fri, Mar 13, 2026, 09:46 Domen Mahne <domen...@gmail.com> wrote:

I don't exactly know how survex works if you have multiple caves shown in terms of altitude. But probably geoid would be more useful. Do you know why the export changes to ellipsoid?

I can only find the timer beep volume. Is it the same setting for the 3 shot leg beep?

yes.

maybe it should be stated better in the manual

V V pet., 13. mar. 2026 ob 09:07 je oseba Marco Corvi <marco...@gmail.com> napisala: