Michael Dufty writes:
> Since GPX (and KML) always use WGS84, I’ve been meaning to put in a
> feature request for QGIS to automatically select this when exporting
> to those formats. Currently it’s quite an unfriendly experience to
> export to these formats from QGIS as there are lots of
Stewart Holt writes:
> I will read your references to try to figure out whether WAAS is ITRF2008
> or 2014. But since the difference is millimeters, it is not really
> important.
That difference is not important. The other question is epoch, and it
seems pretty clear that for a frame like
Many many thanks to Nicolas Cadieux for that research!
--
Garth Fletcher
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Since GPX (and KML) always use WGS84, I’ve been meaning to put in a feature
request for QGIS to automatically select this when exporting to those formats.
Currently it’s quite an unfriendly experience to export to these formats from
QGIS as there are lots of options, many of which (like
Thank you very much for this research. I am surprised that we have not met
in that rabbit hole. I first got interested in this when trying to see how
close I could match the coordinates obtained with an hour of data
collection using my SXblue II L1 GNSS WAAS unit to a USGS monument on a
nearby
: Re: [Qgis-user] Do GPX files contain CRS
information?
Hi,
This last question brought me down a rabbit hole that took me a
while to find (at least partially). Of course, this is far away
from the original question of "Do GPX files contain CRS
information?".
Hi,
This last question brought me down a rabbit hole that took me a while to
find (at least partially). Of course, this is far away from the
original question of "Do GPX files contain CRS information?". The
answer to that was no. The datum is WGS84 (in it's most current
iteration, or
> “If you can find a clear statement of what frame any SBAS uses, I'd love
> to see a URL/pointer.”
https://gssc.esa.int/navipedia/index.php/Reference_Frames_in_GNSS
My guess is that each constellation will use there own reference frame for the
WAAS system they choose to implement. Each can
Hi,
https://sxbluegps.com/sbas-made-easy/
This could help understand WAAS. To my knowledge, all GPS signal broadcast
with the latest WGS84 CRS. WAAS should use this CRS (when using static point
and shoot mode). I imagine that if you used gps satellites and Glonass, then
the gps unit must
Stewart Holt writes:
> "If you can find a clear statement of what frame any SBAS uses, I'd love to
> see a URL/pointer."
>
> I have spent a few hours on many occasions in the last couple of years
> trying to find a definitive answer from an authoritative source. I have
> arrived at the same
"If you can find a clear statement of what frame any SBAS uses, I'd love to
see a URL/pointer."
I have spent a few hours on many occasions in the last couple of years
trying to find a definitive answer from an authoritative source. I have
arrived at the same conclusion that ITRF2008 OR 2014 is
On 3/5/21 3:00 PM, qgis-user-requ...@lists.osgeo.org wrote:
On 05.03.21 06:02, jeremy benwell wrote:
I was wondering if GPX files contain CRS information? I saved some
waypoints in my garmin gps and then used GPSBabel to upload those waypoints
to my computer and create a GPX file. The map
Nicolas Cadieux writes:
>> For elevation, I read the spec as saying that the datum is "WGS84
>> orthometric height", meaning that one takes WGS84 ellipsoidal height and
>> uses EGM2008 to get a height that is sort of "above sea level". The
>> notion that the height is ellipsoidal height is to
Hi,
See comments below. Comments welcomed.
Nicolas Cadieux
https://gitlab.com/njacadieux
> Le 5 mars 2021 à 08:43, Greg Troxel a écrit :
>
> Nyall Dawson writes:
>
>> On Fri, 5 Mar 2021 at 14:59, jeremy benwell wrote:
>>> I was wondering if GPX files contain CRS information? I saved some
Nyall Dawson writes:
> On Fri, 5 Mar 2021 at 14:59, jeremy benwell wrote:
>>
>> I was wondering if GPX files contain CRS information? I saved some
>> waypoints in my garmin gps and then used GPSBabel to upload those
>> waypoints to my computer and create a GPX file. The map datum on my
>> gps
Hi Jeremy,
as far as I can remember, the CRS of waypoints is by default EPSG 4326,
no matter what you change in the settings of the device (changes just
alter display of coordinates on the device). But I haven't touched a
garmin for ages (yuk!) and do the stuff with my phone.
Your garmin seems
On Fri, 5 Mar 2021 at 14:59, jeremy benwell wrote:
>
> Hi,
>
> I was wondering if GPX files contain CRS information? I saved some waypoints
> in my garmin gps and then used GPSBabel to upload those waypoints to my
> computer and create a GPX file. The map datum on my gps was set to GDA 94.
>
Hi,
I was wondering if GPX files contain CRS information? I saved some
waypoints in my garmin gps and then used GPSBabel to upload those waypoints
to my computer and create a GPX file. The map datum on my gps was set to
GDA 94. Does my GPX file contain the CRS that my GPS was set to when I
saved
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