My location is off by nearly 4 miles on Google. It seems someone decided
that my street address is Millstone Court rather than the correct Mill Stone
Court. I am moved South and West 4 miles. I don't see updating the FCC
Database just to bring my address into compliance with somebodies rules. I
bet there are a lot of people who have this same problem.
Maybe Google will make Minerva Reef a DXCC entity again as it was last
reported under water at all times.
73 Dave K4JRB
----- Original Message -----
From: "RDStraw" <n6bv@arrl.net>
To: <towertalk@contesting.com>
Sent: Tuesday, August 23, 2011 11:17 AM
Subject: Re: [TowerTalk] TowerTalk Digest, Vol 104, Issue 42
> Jim:
>
> Your analysis of the problem in Google Earth for Malpelo looks reasonable
> to
> me. Do you know of someone at Google to whom such problems can be
> reported?
>
> 73, Dean, N6BV
>
>> Date: Mon, 22 Aug 2011 15:57:09 -0700
>> From: Jim Lux <jimlux@earthlink.net>
>> Subject: Re: [TowerTalk] Terrain data for HFTA
>> To: towertalk@contesting.com
>> Message-ID: <4E52DEC5.8080509@earthlink.net>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>>
>> >
>> > I would not trust Google-Earth elevation data.To add an example like
>> > Bimini, Bahamas: Check Malpelo Island, HK0TU, 400 km away from
>> the colombian
>> > Pacific coast (4.0 N, 81.6 W) According to Google earth the island is
>> > submerged under the water surface a least 340 ft. In reality,
>> this island has
>> > elevations over 1000 ft ASL.
>> >
>>
>>
>> I think that's a good example of which ellipsoid is being used. if you
>> move your cursor across some of the islands (little more than rocks
>> sticking up, it looks like) at 3-49-57.46 N 81-36-15.28W it seems to be
>> pretty consistently around -80m
>>
>>
>> If you traverse across the island (center roughly at 4-0-12N 81-36-27W)
>>
>> you see the altitude smoothly vary from -80 to the SE of the island,
>> getting gradually lower to -229m (at least) to the NW of the island
>>
>> In fact, if you look at all the elevations in the area, it runs around
>> -240m everywhere, and that -60 to -80 seems to form a hump to the SW of
>> the island. It looks more like it's misregistered between the elevation
>> grid and the island. Again, that could be how the original photo image
>> was georeferenced vs what the elevation data was referenced against in
>> terms of datum
>>
>> Given the extreme depths (<-1000m) not too far away, I'm going to guess
>> that Google Earth is returning bathymetry data.
>>
>> So, I'd say a combination of spheroid and data set mismatches.
>
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