[time-nuts] GPS coordinate differences between APRS.FI and Google Maps

Patrick Barthelow apolloeme at gmail.com
Fri Apr 20 20:45:57 EDT 2018


Indeed, probably datums.
I dont have the numbers in my head, but here is a
Good tutorial about Geo - Datums.
https://vdatum.noaa.gov/docs/datums.html


Best, 73,   Pat Barthelow AA6EG
apol <apolloeme at gmail.com>loeme at gmail.com


*"The most exciting phrase to hear in Science, the one that heraldsnew
discoveries,  is not "Eureka, I have found it!"    but:*
"That's funny..."  ----Isaac Asimov



On Fri, Apr 20, 2018 at 4:33 PM, Azelio Boriani <azelio.boriani at gmail.com>
wrote:

> aprs.fi uses google maps... have you taken a look to your raw packets?
>
> On Sat, Apr 21, 2018 at 12:34 AM, Scott McGrath <scmcgrath at gmail.com>
> wrote:
> > DATUM perhaps?
> >
> > Content by Scott
> > Typos by Siri
> >
> > On Apr 20, 2018, at 5:20 PM, Russ Ramirez <russ.ramirez at gmail.com>
> wrote:
> >
> > This has probably been mentioned before, but there is a significant
> > discrepancy between APRS.FI locations for DMR hotspots for example, and
> > what my Trimble receiver and Google Maps says when I use my address to
> > lookup the coordinates.
> >
> > On APRS.FI my location has to be 45.15 N, -93.39 W for the icon to be in
> > the right location on the map.
> >
> > On regular Google Maps, my QTH is correct and matches what my Trimble
> says
> > via Lady Heather within a few seconds. 45.2586 N, -93.6554 W.
> >
> > Do any of you know what causes this, and did I do anything wrong
> possibly?
> > TIA
> >
> > Russ
> > K0WFS
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