How much trust does one have WRT state boundaries and what Maidenhead displays? The borders are often not straight nor do they always align with Lat/Lon ... looking at Wyoming, we seem to have 8 more grids than our rectangular shape would have one believe (some from Colorado and others from Montana).
Anyone else see this or similar?
Thanks and 73,
Douglas Tabor, N6UA - Sent from my iPad
Hi Doug!
I trust the latitude/longitude readings from my GPS receiver (or GPS in phones or radios), but do not rely on those for county, state/province, or international boundaries. For these boundaries, I rely on markers/signs. For example, the boundary between the states of Arizona and Utah was supposed to follow 37 degres North exactly - but it was surveyed long before we had GPS. At some points, that boundary is just north of 37 degrees North (DMx6/DMx7 grid boundary). Near Lake Powell, the grid boundary falls in Arizona. Along US-160 or US-191 further east, the grid boundary falls in Utah. This is even more pronounced along portions of the USA/Canada border, especially the section that is supposed to follow 49 degrees North from Washington state to Minnesota's Northwest Angle.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Tue, Apr 30, 2019 at 5:59 PM Douglas Tabor via AMSAT-BB < [email protected]> wrote:
How much trust does one have WRT state boundaries and what Maidenhead displays? The borders are often not straight nor do they always align with Lat/Lon ... looking at Wyoming, we seem to have 8 more grids than our rectangular shape would have one believe (some from Colorado and others from Montana).
Anyone else see this or similar?
Thanks and 73,
Douglas Tabor, N6UA
And then you have the western states whose borders are determined based on "degrees west of Washington" which will not fall on grid lines because the Washington meridian, at the Old Naval Observatory, is about 3 minutes west of 77 degrees west.
73,
Paul, N8HM
On Tue, Apr 30, 2019 at 2:44 PM Patrick STODDARD (WD9EWK/VA7EWK) via AMSAT-BB [email protected] wrote:
Hi Doug!
I trust the latitude/longitude readings from my GPS receiver (or GPS in phones or radios), but do not rely on those for county, state/province, or international boundaries. For these boundaries, I rely on markers/signs. For example, the boundary between the states of Arizona and Utah was supposed to follow 37 degres North exactly - but it was surveyed long before we had GPS. At some points, that boundary is just north of 37 degrees North (DMx6/DMx7 grid boundary). Near Lake Powell, the grid boundary falls in Arizona. Along US-160 or US-191 further east, the grid boundary falls in Utah. This is even more pronounced along portions of the USA/Canada border, especially the section that is supposed to follow 49 degrees North from Washington state to Minnesota's Northwest Angle.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Tue, Apr 30, 2019 at 5:59 PM Douglas Tabor via AMSAT-BB < [email protected]> wrote:
How much trust does one have WRT state boundaries and what Maidenhead displays? The borders are often not straight nor do they always align
with
Lat/Lon ... looking at Wyoming, we seem to have 8 more grids than our rectangular shape would have one believe (some from Colorado and others from Montana).
Anyone else see this or similar?
Thanks and 73,
Douglas Tabor, N6UA
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
Off hand on a semi-quick test, the lat-longs for all four corners of Wyoming and a few of the variations from the App match Google Earth as closely as the displayed resolution supported.
Jim K6CCC
-----Original Message----- From: "Douglas Tabor via AMSAT-BB" [email protected] Sent: Monday, April 29, 2019 18:43 To: [email protected] Subject: [amsat-bb] iOS app Maidenhead
How much trust does one have WRT state boundaries and what Maidenhead displays? The borders are often not straight nor do they always align with Lat/Lon ... looking at Wyoming, we seem to have 8 more grids than our rectangular shape would have one believe (some from Colorado and others from Montana).
Anyone else see this or similar?
Thanks and 73,
Douglas Tabor, N6UA - Sent from my iPad _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: https://www.amsat.org/mailman/listinfo/amsat-bb
participants (4)
-
Douglas Tabor -
jim＠k6ccc.org -
Patrick STODDARD (WD9EWK/VA7EWK) -
Paul Stoetzer