[meteorite-list] I'm getting confused by the MB coordinates

[Dave Freeman mjwy]

Dear Walter, List;
Datum's are an issue!  My Rock Springs meteorite was GPS'ed as on Rail 
road property but when referenced with BLM realestate specialist, it was 
a BLM land meteorite, cuprit:   I needed to use 1928 datum, not the 
CONUS datum.    Yes, datum's are an issue!
Dave Freeman
Rock Springs, WY

Walter L. Newton wrote:

>Hi
>
>Some of you may have remember being bored by my running dialog with the MB
>and Jeff in reference to the actual find spot of a Colorado meteorite.
>
>In the MB, the Apex Colorado meteorite has coordinates that puts the find
>(1938) at about 4 miles north of the actual location. I know the actual
>location because of the narrative in the MB, and Jack Murphy concurs. He
>knows where it was found and it's not where the MB coordinates have it.
>
>Now... a have a new girlfriend (yes, this is really going somewhere) and
>Steffanie lives in Russell Gulch Colorado, which is an old mining town south
>and above Central City Colorado. It's listed as a ghost town even though it
>has about 35 folks living there.
>
>Well, looking at the MB list of Colorado meteorites, low and behold, we have
>a Russell Gulch meteorite, an iron, found in 1863.
>
>But, if you check the coordinates with Google Earth, the find spot would be
>right in Central City Colorado... about 4 miles north of Russell Gulch.
>
>Do we see a pattern here. Steff is going to hook me up with an old timer
>that lives in Russell Gulch, who knows about the find and has a good idea
>where it was found.
>
>My question is (I promised this was going somewhere)... was some of the
>coordinates in the MB constructed from a different map datum. I vaguely
>remember something about different datum sets used for lat. and long. I
>don't really understand the details about this, but I know my simple GPS
>unit has a whole list of datum sets that I can set my unit to.
>
>Are the MB coordinates really right, but using a different "starting point"
>then Google Earth.
>
>Otherwise, I guess I'm going to go off on another tangent with the MB about
>another find spot.
>
>Maybe someone can point me to an online article that explains all this?
>
>I know this is not as earth shattering as losing a whole planet, but it bugs
>me none the less.
>
>Stop me before it's too late. (did this make any sense?)
>
>Walter L. Newton
>Golden, Co 
>
>
>
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