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Author Topic: Beelining  (Read 3333 times)
Michael Bush
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« Reply #20 on: March 10, 2007, 08:46:44 AM »

>But  trees aren't marked on a map!!

That depends on the map.  If you go to google map and get a satellite picture of the area and print it off, it DOES have the trees on it.
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Michael Bush
My website:  bushfarms.com/bees.htm
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Understudy
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« Reply #21 on: March 10, 2007, 01:13:50 PM »

You assume that bees like trees. I find they prefer roof sophets, abandon cars, mobile homes, old barns, and unused boats.

Sincerely,
Brendhan
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Jerrymac
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« Reply #22 on: March 10, 2007, 11:59:51 PM »

That depends on the map.  If you go to google map and get a satellite picture of the area and print it off, it DOES have the trees on it.

How updated are these maps? Everytime I look up my place I get a picture from back in 2002.
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Cindi
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« Reply #23 on: March 11, 2007, 11:28:10 AM »

Papabear.  All I can say to you is that you took a beautiful close up shot of your marked bee.  I love to see the pictures that members put on the forum.  Keep it up, best of luck with what you are trying to do.  Have an awesome best of the great day.  Cindi
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There are strange things done in the midnight sun by the men who moil for gold.  The Arctic trails have their secret tales that would make your blood run cold.  The Northern Lights have seen queer sights, but the queerest they ever did see, what the night on the marge of Lake Lebarge, I cremated Sam McGee.  Robert Service
jfischer
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« Reply #24 on: March 16, 2007, 05:06:28 PM »

I guess I should clarify "triangulate"...

If one has a GPS, one can use a feature called "project waypoint" to find the
intersection of two or more flight vectors, and then use the GPS to find
that location, which certainly may not locate the exact tree, but gets you
close enough to where you can start looking around for bees doing their
thing near the hive entrance.

But you need not depend upon only a few vectors.  You could keep
releasing bees, and use all the vectors, thereby locating multiple hives.
It is not at all unusual to find that some bees released fly away in
an unexpected direction, which may indicate that one has multiple
hives in the area being surveyed.

Fair warning, the following gets a bit "technical"...

If you use any GPS, you have a very accurate waypoint from which you
released each bee, and you have a fair-to-good estimate of the point at
which you lost sight of the bee, which you can walk to and mark as another
waypoint.

So, for each bee, you have a Longitude/Latitude where you released the
bee (x1, y1), and a Longitude/Latitude pretty near where you lost sight
of the bee (x2, y2). If you have another bee that appeared to be flying
in the same general direction, you can do some math to extend the vectors
to their intersection, as follows:

Do the following or each bee flight vector:

A = y2 - y1
B = x1 - x2
C = A*x1 + B*y1

To find the intersection of any two bee vectors,
you take the A, B, and C for each and find "D":

D = A1*B2 - A2*B1

And the intersection of the two flight vectors
(a possible hive location) is:
x intersection scalar = (B2 * C1 - B1 * C2) / D
y intersection scalar = (A1 * C2 - A2 * C1) / D

In all of the above:
"x" is always a longitude
and "y" is always a latitude

And you can map all the data on any mapping
system. If you don't have a mapping system,
you can plug your longitudes and latitudes into
http://www.gpsvisualizer.com/map?form=google
and make a Google map.

So, all you really need to do is capture bees
with a beelining box and release them from
a reasonable spread of locations. Finding the
hives (or counting them) is a matter of simply
mapping enough data from enough bees.

When you have 3 bees all flying from a
bee-lining box from different locations
to the same general area, that area's
nearly certain to contain a hive.
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Cindi
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« Reply #25 on: March 17, 2007, 10:10:15 AM »

jfischer.  OK, now I am done for the day.  I am so tired from trying to understand your post that I think that I have to go back to bed and have a snooze. 

Actually, what I am trying to say is that, good for you, you are fortunate that you can understand this type of information and impart it to others that may understand.  I love how humans all have a little piece of this world that they are good at.  Have an awesome day.  Cindi
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There are strange things done in the midnight sun by the men who moil for gold.  The Arctic trails have their secret tales that would make your blood run cold.  The Northern Lights have seen queer sights, but the queerest they ever did see, what the night on the marge of Lake Lebarge, I cremated Sam McGee.  Robert Service
papabear
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« Reply #26 on: March 18, 2007, 10:20:08 AM »

I have a GPS and I think i can do this.  Thanks for all the input.
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