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Messages - lor74cas

#166
Quote from: poutnikl on January 20, 2021, 11:52:28

QuoteIt makes still sense to provide ETA, if you provide also information, what you can and should expect and the range of applicability. Applying it in extreme circumstances and expecting standard behaviour would be rather an extreme than standard state of mind.
I agree.

QuoteI remember it was also discussed, not sure if implemented, that the "nominal" ETA, calculated at route planning, would be in real time updated by comparison of partial values of nominal versus real time for the passed part of the route. (whole or last x km/minutes ).
Yes, locus adapts the ETA based on the pace held in the previous period and the path still to be covered. But of course this is not the context of the planner.

QuoteE.g. a route has estimated ETA in 100 minutes. After passing the first half ( by expected spent time ), i.e. with the nominal  ETA 50 minutes, you realize you have spent 55 minutes, i.e. 5 minutes more. So for the rest nominal 50 minutes, you should expect rather 50*55/50=55 minutes  as well. Or, it could be evaluated for the last nominal 10 minutes, instead of the whole 50 minutes. So 50*11/10=55 min.
Not necessarily, you have to consider the type of path you have already taken and what remains to be done. If in the first 55 minutes you did the flat part, on easy terrain and then you still have 1000 meters of altitude difference left on a bumpy path? Not everyone is able to make this type of assessment, it takes experience and knowledge of their skills that are lacking in those who rely more on technological tools.
Furthermore, I have not seen the fatigue in the formulas that calculate the ETA. If on journeys within 3 hours it may not even be taken into consideration, beyond a certain threshold is instead decisive. If we take an example similar to yours, a 6-hour ride estimated by the ETA: if after 3 hours and 30 minutes I am halfway (with the same track between the first and the second part) it will not take a total of 7 hours, but maybe 8 due to performance degradation due to fatigue. In addition, the longer the routes are, the easier it is for the difference between real time and ETA to become large, also entailing the risk for those who are out to find themselves still far from their destination and with the sun setting down.

#167
Quote from: poutnikl on January 19, 2021, 19:38:28
I am afraid tweaking of foot profiles will not help in tweaking hiking/running ETA. ETA calculation for foot profiles is AFAIK hardcoded to BRouter, perhaps some variant of Naismith or Tobler formula.

You could experiment to pretend during running you are a bike, with some experimental tweaking of the to-be-for-bike parameters.
Yes, I had already experienced that as a human bike  ;D the ETA was much closer to my time. Unfortunately, the bike in the downhill and flat sections on easy terrain has too much advantage over one that runs on foot, so the ETA becomes similar on hard terrain, but if there are asphalted sections or fast descents the difference grows again.
In general, the ETA is very subjective and combining it with profiles that were created for navigation without being able to insert a personalization makes little sense, in particular when the ETA provides an absolute time and not a range between minimum and maximum. Specifically, the ETA calculated by Locus also provides an estimate of rest times, which is even more subjective thus providing an arbitrary total ETA. It would be enough to warn the user that the ETA is calculated without the rest times.
How difficult is it to calculate the ETA?
A lot to judge from this study:
Analyzing Tobler's Hiking Function and Naismith's Rule Using Crowd-Sourced GPS Data
QuoteFor both rules, 35% of tracks had predicted times within +/- 10% of the actual moving time.  70% were within +/- 25% of the actual time and 93% were within +/- 50%.
So I'm wondering if it makes sense to provide data that can be subject to such a high variation?
IMHO wrong information is worse than no data. The ETA at this point only makes sense for road routes by bike or car, it makes no sense on foot and on paths.
I would never want to know about a lost hiker in the woods (I saw Jungle yesterday and was influenced) based on the ETA provided by Locus. It is better for everyone to evaluate their abilities in accordance with the type of track and weather conditions without blindly relying on a data that we know may not be correct. I know it would all be part of natural selection as Darwin teaches, but it would still be a marketing damage  ;)
#168
Quote from: poutnikl on January 19, 2021, 13:18:30
Quote from: lor74cas on January 19, 2021, 12:03:38
Hi,
How can I set up the ETA in the planner?

The ETA on the map using planner is not the same on the stat of the panel.

AFAIK, ETAs on the planner are those reported by BRouter according to its internal algorithm, affected by BRouter profile configuration of the Brouter profile kinematic model ( cars or recent ones for bikes ). 

Stats in the panel are calculated by Locus from its builtin activiity profiles for horizontal/vertical speed, according to the route altitude profile and chosen activity, independently on BRouter.

IMHO, both have their place, but perhaps the user could choose either of them as the planner default.

Using a brouter profile for ETA has an advantage - when using an external profile - that one can tune the profile according to his physical conditions or intended effort. E.g. you can set the biker's steady mechanical power, tyre rolling resistance, aerodynamical drag or the total bike mass. It becomes handy for planning long distance trips/expeditions, where a bike is heavy and affordable mean sustained power is rather low.

Most of these parameters can be well estimated but the power. My advice here is to tune the estimated mean power up/down, until its prediction for the relevant scenario matches the reality. E.g. I use for myself for 4+ hours trips 85 Watts.

Thanks for the answer, I thought the same too. By adjusting the brouter profiles I could get a more accurate estimate.
I generally do hiking, trail running and running activities.
I tried to understand where to act in the brouter profiles to get a custom version for my needs. But even looking at a lot of documentation on the net I did not understand where I can act for example to increase the basic speed.
In the profiles I saw I read "4 km per hour on the flat and 600 meters of altitude as a base". I should take them to 10.5 km and 800 meters how can I do?
To get an idea, I'll post a strava link of my recent activity https://www.strava.com/activities/4634408193 I don't know how true that can be, but I have a value of ~ 182 w Estimated Average Power.
Thank you for your time
#169
Hi,
How can I set up the ETA in the planner?

The ETA on the map using planner is not the same on the stat of the panel.
#170
Hi,
I like well-spaced icons in the menu, but the distance between the label and the icon is too big. Even the last few items on the menu are too far apart. The bottom with the locus logo could be placed next to the username.
#171
Quote from: 0709 on January 10, 2021, 11:47:37
I understand what lor74cas is saying. The worst thing that can happen to me is when a complete stranger asks me, what nice cards do you have on your phone, what website is that? No ma'am or sir it's an app called Locus. And then the difficult question, is it easy to operate? Then I get very quiet and this geek knows how difficult it is to escape this quickly ;-) Regarding online routing or offline, I don't think this is an extra difficulty, just not that.
This is what always happens to me out of 10 people I show locus maybe 1 or 2 don't get discouraged by too many options. For me, the coexistence of brouter's "inner" and "online" service is not a problem, but it was just one example of the many things that could be simplified. And if I had to choose I would prefer the "inner" service. Locus in fact is one of the few apps that guarantees operation even offline and is one of the reasons why I chose it.
#172
Hi everyone,
generally if I have to plan some trips I usually do it with the PC which is certainly more comfortable than doing it on the small screen of the mobile phone. I do planning on my mobile only when I don't want to get up from the sofa and turn on the pc (sometimes I'm too lazy) or when I'm outdoors and I want to get an idea before taking a detour or lengthening the route I had planned previously. The online brouting service makes little sense to me also because often if I'm outdoors I don't have cellular network coverage. I think there are too many options in Locus that compromise its ease of use and scare the average user, it seems to become more and more an application for geeks / nerds (obviously I belong to the category). In my opinion, but it is only my opinion, we should cut, simplify and make what remains more reliable and in this specific case I would not activate the online brouting service, I would only leave the "inner" version with a specific function to notify the user to update the brouter database.
#173
Again  Locus Pro closed, Garmin app closed, but Garmin sync notification still present.

Inviato dal mio SM-A520F utilizzando Tapatalk

#174
Quote from: menion on May 14, 2020, 08:53:51
As I wrote previously "It is possible that restoring backup in LM4 may need to set most of the custom folders (mainly to SD card) again. It is correct.". The setup of folders have to be done manually in every version. The question to me is why you need to restore backups, why you just do not keep Free/Beta/Alpha version installed as is, that's all.

Truncated texts in popups are known to me, but I've just not yet found a working solution :-\

ok I'll set up the folders manually as usual, I'm lazy so I was confident in the restore of the pro backup.

As you can see at this post https://forum.locusmap.eu/index.php?topic=6817.msg59050#msg59050
we can not have at the same time LM4 and LM-beta we need to choose,  as correctly suggested by balloni55 in the answer.
#175

  • With new version, no more problems with SD
  • Imported the setup backup of pro version in LM4, successfully but the LM4 folders settings has still issues. Attached screenshot
  • The explanation text is truncated. Attached screenshot
#176
Hello,
LM4 does not like my Locus folders settings so to avoid duplication of maps and srtm I need at every update to set them as in the PRO version. This time I tried to retore the backup and found the bug.

After my last post, I was tired to see in google store update the free(beta) version because I use LM4 and I uninstalled it. Result, no more LM4 and when trying to install it back from the apk it says it does not find my sd card, see attached screenshot.

LocusPro works well, I also attached its settings of folders.
#177
Restore of backup crash
At every installation of a new LM4 I need to restore the folders settings, this time I tried the backup restore and found the bug

Inviato dal mio SM-A520F utilizzando Tapatalk

#178
Hello,
in these quarantine days in which in Italy it is allowed to go out only at a distance of 500 meters from home, I used locus to determine how far I could go. I used the geocaching tool circle. It works perfectly, but eliminating it is not intuitive at all.
From KNOWLEDGE BASE:
"How to remove items drawn by the geocaching tools:

tap the  Hide temp map items button in Map items screen topbar or
long-tap the Data manager button in the Function panel and select Hide temp map items or
add Hide temp map items button directly to your Function panel"

In my opinion, the easiest way would be to have a deactivation button in the same mask where I activated the function.
#179
I tried the new circular automatic track, yes it works but why should I use it for ?

What I need is something that connects last point to start point to create a circular track

Inviato dal mio SM-A520F utilizzando Tapatalk

#180
The idea to let the user to set up the long click function it's great. All happy.
Found a little bug in manual mode Locus does not draw the line connecting the points.


Inviato dal mio SM-A520F utilizzando Tapatalk