[Talk-GB] Mapping from a survey

[Jon Pennycook]

I'm another OSM Tracker user, although I use GPS Status
(com.eclipsim.gpsstatus2) to help my GPS accuracy.  OSM Tracker is very
convenient - for many things, you can just click two buttons (Restriction
then Traffic Signals for example).  For more complex things, the ability to
write notes is useful.  Once done, you can then tell it to upload your GPX
file to OSM, or export it whichever you prefer.

Potlatch (https://www.systemed.net/potlatch/) will load GPX files directly
from your OSM profile.  With iD, you have to have a local GPX file then
drag it into the session, which is less convenient.  Potlatch lets you have
many GPX files loaded at once, but iD only one.  I often have Potlatch with
many GPX files loaded on one monitor, then use iD with just the most
relevant GPX file loaded for the actual edit, assuming I want to align with
OSMUK Cadastral Parcels.  If I'm working on an area not covered by aerial
imagery (e.g. new roads), I just make the edits directly in Potlatch.  In
both cases, the notes or the text from the buttons is shown along a line
representing your track.

For Mapillary, I record footage on my bike cameras (Cycliq Fly12 CE, Cycliq
Fly6 CE GEN2, CrossTour CT9900), strip out the date/time stamp, then
convert to geotagged images before uploading to Mapillary using these
scripts: https://gitlab.com/jpennycook/bikecam (needs PowerShell, exif
tool, ffmpeg, mapillary-tools; MediaInfo is useful but not required).  The
process takes into account the fact that the camera time can be out of sync
with the GPS time.  I find it useful to record 10-20 seconds of
https://time.gov/ about once every hour or two so I can find the offset of
camera time versus GPS time. The results look like this (it was raining):
https://www.mapillary.com/app/?pKey=594268418259232

Jon

On Fri, 13 May 2022 at 11:49, Timothy Noname <hervbeof at gmail.com> wrote:

> I also use OSMTracker for Android. If your GPS signal is good it provides
> a great way to upload GPS tracks which you can then edit using the web
> editor, iD
> To make the GPS on my phone more accurate I always use this app
> https://play.google.com/store/apps/details?id=com.eclipsim.gpsstatus2
> It's important to stand still until the GPS signal shows the best
> accuracy. Mine never shows better than 3.2m
>
> If you have a smart watch you may also be able to track your GPS and
> upload it, but it will likely be harder to do and less accurate.
>
> You could also use Mapillary to create a photo record when walking but you
> do look a bit crazy walking around holding your phone up.
>
>
>
>
>
> On Fri, 13 May 2022, 11:15 David Woolley, <forums at david-woolley.me.uk>
> wrote:
>
>> On 13/05/2022 10:51, Mark Goodge wrote:
>> > Can anyone suggest a good way to go about that? I've never mapped from
>> a
>> > survey before, and I don't really know what the process is. Are there
>> > apps for a phone which I can use to trace lines that I can then
>> transfer
>> > to OSM later?
>>
>> Mapping from a survey is actually the gold standard way of mapping, and
>> the ability of the general public to do it was what made OSM possible!
>>
>> Any good dedicated satellite navigator should be able to log tracks.
>>
>> Considering Android, I use OSMTracker, for raw track collection, Keypad
>> Mapper for house numbers (although I've not used it in a while, and it
>> comes up with a warning about being built for an old Android), and
>> Vespucci as a full function editor.  The first can directly upload
>> tracks, although I generally save to a local file. I've never looked
>> into track support on Vespucci.
>>
>> I use JOSM as the main editor, and it can read tracks from local files
>> or from the server and use them as a background for mapping.  You should
>> not upload the raw track to form the feature, but rather simplify it and
>> smooth it based on what your eyes told you.
>>
>> You can of course use other methods, like pacing or laser range finding
>> distances, triangulation, measuring photographs, etc.
>>
>> _______________________________________________
>> Talk-GB mailing list
>> Talk-GB at openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-gb
>>
> _______________________________________________
> Talk-GB mailing list
> Talk-GB at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/talk-gb
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/talk-gb/attachments/20220513/060d39e1/attachment.htm>