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bentley
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PostSubject: Radian info   Tue Feb 14, 2012 6:28 pm

Here's a bit of information on radians. Suggests a possible military connection.

From the book Archaeological surveying and mapping: recording and depicting the landscape

http://books.google.com/books?id=M11ErXZju0QC&pg=PA13&lpg=PA13&dq=radian+in+surveying&source=bl&ots=tWOc2_YT07&sig=gMCjbC3PidhoSAMgx-kowntQzB8&hl=en&sa=X&ei=5fI5T4miNoXbiAKAruySDA&ved=0CC4Q6AEwAQ#v=onepage&q=radian&f=false

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PostSubject: Re: Radian info   Tue Feb 14, 2012 6:36 pm

Yep, military, Architecture, engineering, and surveying, all can be fields that involve knowledge of Radians

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PostSubject: Re: Radian info   Tue Feb 14, 2012 7:18 pm

Radians show the (magnetic angle) direction to walk, inches a distance according to the scale of map. Developing radians is one thing (one step forward, one step along the circle line..), interpreting them as angles is the more common way of interpretation.

However it seems to be true that milliradians are used by snipers to measure their shooting distances in their sight of the gun. Overall this could origin from the same approach as the inch=distance on the map theory. Maybe Z was very conform with such (military) hunting issues.

http://zodiackillersite.forummotion.com/t1069-mt-diablo-an-overlooked-clue

Maybe someone wants to check out the owner names of APN 260151020? (http://ccmap.us/gis/)

Dig the garden.

Quicktrader confused
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Nin
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PostSubject: Re: Radian info   Tue Feb 14, 2012 11:11 pm

Quicktrader wrote:
Radians show the (magnetic angle) direction to walk, inches a distance according to the scale of map. Developing radians is one thing (one step forward, one step along the circle line..), interpreting them as angles is the more common way of interpretation.

However it seems to be true that milliradians are used by snipers to measure their shooting distances in their sight of the gun. Overall this could origin from the same approach as the inch=distance on the map theory. Maybe Z was very conform with such (military) hunting issues.

http://zodiackillersite.forummotion.com/t1069-mt-diablo-an-overlooked-clue

Maybe someone wants to check out the owner names of APN 260151020? (http://ccmap.us/gis/)

Dig the garden.

Quicktrader confused

The house was built in 1974.

-Nin
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onewhoknows
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PostSubject: Re: Radian info   Tue Feb 14, 2012 11:24 pm

23657 Breezy meadow Ct., Moreno Valley, Ca 92557 Riverside County built in 1987
APN 260-151-020 Homeowner names going back to 1987 Is that what you're looking for?
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PostSubject: Thanks for support   Wed Feb 15, 2012 1:54 am

but Moreno Valley is at Riverside County, however I look for the identical APN in Contra Costa County:
http://ccmap.us/gis/


APN 260151020
Site Address Number (deleted due to forum rules)
Site Street Name ST STEPHENS
Site City ORINDA
Site Zip Code 94563
Site Zip Code Extension 1950
Deed Reference 8231 270
...

http://www.criis.com/contracosta.html

Maybe deed reference number is needed as well? I am not conform with California deed record / cadastral issues and could the digital records go back only to 1986...however the information should still be there, maybe someone finds time to stop-by there - shouldn´t be much effort if living in the area (compared to a 4000m-flight I of course would do otherwise ;-)).

It is true that the house has been built in 1974, the year when Zodiac reduced his postal activities. One postcard was stamped in Orinda, a senior John 8v8r8tt seems to have lived in Orinda as well.

Dig the garden.


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onewhoknows
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PostSubject: Re: Radian info   Wed Feb 15, 2012 12:19 pm

26 St Stephen's is an interesting location....
As a Realtor, I didn't think they would assign as APN to more than one property
in the state. Your APN has the numeral five added to the end of it, the one for Riverside
County does not. Sorry to interject if it was offtrack.
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PostSubject: Re: Radian info   Wed Feb 15, 2012 2:05 pm

Onewhoknows...if you really know, tell us ;-). Otherwise: Can you check-out the (former) owners of this location? Would love to see if there is a match with the my-name-is-cipher...

If someone has any other solution for the cipher, please don´t hesitate - I am willing to calculate the precise longitude/latitude data as I did with St. Stephens Drive..especially if someone has experience with military training in geographical/magnetical orientation, e.g. troops, snipers etc.

However I find the symbol on the house somehow irritating, same with the perfect drawing of it and its location in the 'center' of many crime scenes.

Interesting news as well, although from another source:

The 'The Zodiac is going to' postcard from October 1970 seems to have its origins in Orinda, although stamped in Berkeley. This would be the second letter coming from Orinda as far as I know. (http://www.opordanalytical.com/phpBB3/viewtopic.php?p=3394)

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PostSubject: Re: Radian info   Wed Feb 15, 2012 8:47 pm

for 26 St Stephen's in Orinda (an area my POI was very familiar with)
the family name I am picking up is Callaham shows a recording 9/18/73
this house is very near a freeway off ramp and on ramp right up the street
furthermore people who know the area, could slip up the back of this neighborhood
and onto Camino Pablo and onto San Pablo Dam Road, then to Hiway 80
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PostSubject: Interestingly...   Thu Feb 16, 2012 3:34 pm

...in the 1971 movie 'Dirty Harry' the inspector's name was Callahan (Dirty Harry). And the movie is based on the Zodiac stories, Callahan was the character of Dave Toschi. Did Z want us to find the way back to Dave Toschi? If so, he must have known about the movie in advance (script) as the letter was sent about one year earlier before the movie was published.

Onewhoknows, thank you for this piece of information...is there any type of APN record? Is the owner you mentioned identical with the owner in 1970? And is your POI related to 'Sandy', Riverside or the my-name-is-cipher?

Quicktrader



Meanwhile...an article of Jay Williams about Radians and inches in shooting:

'If you've always wondered what those little dots are for on a military rifle scope's reticle (cross-hairs), then look no further. I hope to explain, in a clear and concise fashion, how the mil-dot reticle works and also what "minute-of-angle" means.

Minute-Of-Angle
The term "minute-of-angle" (MOA) is used regularly by target shooters at the range, but is probably understood, thoroughly, by few (the same goes for mil-dots). Defined loosely, one MOA = 1" @ 100 yards; so, if you shot your rifle 5 times into a 100-yard target and every shot went into a one-inch circle you had drawn on the paper, then your rifle could be said to shoot 1 MOA. Likewise, if every shot goes into a two-inch circle at 200 yards, then you're shooting 1 MOA. A 10-inch group at 500 yards would be 2 MOA.

Now for the fun part. There are 360 degrees in a circle. Each degree can be broken down further into minutes. There are 60 minutes in a degree. Likewise, there are 60 seconds in a minute. Now, to figure out the distance subtended by 1 minute at any particular distance, we need merely to plug those two values into a simple trigonometric equation. The tangent function fits the bill nicely. Here's the equation:
tan(angle) = distance subtended/distance to the target (units must be consistent--e.g., 1/36 of a yard [1"] divided by 100 yards)

Now, we know the angle (1 minute or 1/60 of a degree) and we know the distance to the target (100 yards), but we need to figure out the actual distance subtended at the target (i.e., is 1 MOA actually 1" @ 100 yards?). What we need to do is solve for "distance subtended." Here's our final equation:
tan(angle)*distance to the target = distance subtended

Make sure your calculator is in "degree" mode (as opposed to "radian" or "gradian") and type in 1/60 (for degrees) and hit the "tangent" button. Then multiply that by 100 yards. This should give you the distance (in yards) subtended at 100 yards. Multiply this by 36 to get inches. The answer should be:
1.047197580733"

This is just a hair over the commonly quoted "one inch." At 1000 yards, this would be almost 10 1/2 inches. Apparently, it is just a coincidence that 1 MOA happens to be REALLY close to 1" @ 100 yards. It is, however, quite convenient.

The Mil-Dot
The "Mil" in "Mil-Dot" does not stand for "Military"; it stands for "milliradian." The radian is a unitless measure which is equivalent, in use, to degrees. It tells you how far around a circle you have gone. 2 PI radians = 360 degrees. Using 3.14 as the value of PI, 6.28 radians take you all the way around a circle. Using a cartesian coordinate system, you can use "x"- and "y"-values to define any point on the plane. Radians are used in a coordinate system called "polar coordinates." A point on the plane is defined, in the polar coordinate system, using the radian and the radius. The radian defines the amount of rotation and the radius gives the distance from the origin (in a negative or positive direction).

ANYWAY, the radian is another measurement of rotation (the degree/minute/second-system being the first). This is the system used in the mil-dot reticle. We use the same equation that we used before, but, instead of your calculator being in "degree" mode, switch it to "radian" mode. One milliradian = 1/1000 (.001) radians. So, type .001 into your calculator and hit the "tangent" button. Then multiply this by "distance to the target." Finally, multiply this by 36 to get inches subtended at the given distance. With the calculator in "radian" mode, type:
tangent(.001)*100*36 = 3.6000012"

So, one milliradian is just over 3.6 inches at 100 yards. If we extrapolate, two milliradians equal about 6 feet at one-thousand yards. You'll see the importance of this, shortly.

The Mil-Dot Reticle
The mil-dot reticle was designed around the measurement unit of the milliradian. The dots, themselves, were designed with this in mind and the spacing of the dots was also based upon the milliradian. This allows the shooter to calculate the distance to an object of known height or width. Height of the target in yards divided by the height of the target in milliradians multiplied by 1000 equals the distance to the target in yards. For example, take a 6-foot-tall man (2 yards). Let's say that the top of his head lines up with one dot and his feet line up four dots down. So: (2/4)*1000 = 500 yards away. This same tecnique can be used to estimate lead on a moving target or to compensate for deflection on a windy day.

The distance from the center of one dot to the center of the next dot is 1 milliradian. We are told (by the folks at Leupold) that the length of a dot is 1/4 milliradian or 3/4 MOA (Given this much information, one can determine that the distance between dots is 3/4 milliradian.).* I use the term "length" because the mil-dot is not round. It is oblong. The "dots" on the verticle crosshair run oblong in the vertical direction. The dots on the horizontal crosshair run oblong in the horizontal direction (i.e., they are lying on their sides). The width of each dot is an arbitrary distance and is not used for any practical purpose. Like a duplex reticle, the mil-dot reticle is thicker towards the edges and uses thin lines in the middle where the dots are located and the crosshairs cross. The distance between the opposite thick portions is 10 milliradians.

*NOTE: 1/4 milliradian = .9" and 3/4 MOA = .785", so, obviously, a mil-dot cannot be both 1/4 milliradian and 3/4 MOA. I called Premier Reticles (they make Leupold's mil-dot reticles) and got an explanation: the dots on their mil-dot reticles are 1/4 mil. They are not 3/4 MOA. Apparently, they (Leupold?) just figured that more shooters understand MOA than milliradians, so they just gave a figure (in MOA) that was close, but not super precise. You can contact Premier Reticles via e-mail and request literature or ask questions.



Summary
To use a mil-dot reticle effectively, all one need remember is that the distance between dot centers is 36" at 1000 yards. This lets you determine the range of a target of known size. At that point, you can dial the scope in for proper elevation OR use the dots to hold over the proper amount. The dots on the horizontal crosshair can be used to lead a target (if you know the range to the target, then you'll know the distance between dots, and thus the distance to lead) or to compensate for deflection.'
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PostSubject: Re: Radian info   Thu Mar 29, 2012 4:56 pm

There also is the (old) Rheem theatre in Orinda, near Moraga Road / Bates street / Mount Diablo Drive / Davis Street. In a forum Gary Parks mentioned that it has some Zodiac signs in the auditorium:

'One could say that it was the last movie theatre of the classic era to be built in the Bay Area. There is abundant neon on the exterior, plenty of etched glass and terrazzo in the entryway, and murals depicting the Zodiac in the auditorium.'

http://cinematreasures.org/theaters/4587/comments

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PostSubject: Re: Radian info   Thu Mar 29, 2012 5:34 pm

Eek! Let's hope it's not depicting him in his hood! Kidding...

I saw the movie "Foul Play" there when I was a little girl. A little taste of the Mikado.

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PostSubject: Callaham / Callahan   Sun May 06, 2012 5:15 pm

A Lt. 'Callahan' is mentioned as investigating officer in the article...this name sounds familiar to the name of the owner, 'Callaham', of 26 St. Stephens Drive, Orinda (possible solution of the radian cipher). Onewhoknows figured out the name of the owner of this little house of horror...

Callahan also was the name of Toschi in the Dirty Harry movie which was based on the Z story.

Dig the garden.



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PostSubject: Re: Radian info   Thu Jun 07, 2012 11:55 am

Quicktrader wrote:
A Lt. 'Callahan' is mentioned as investigating officer in the article...this name sounds familiar to the name of the owner, 'Callaham', of 26 St. Stephens Drive, Orinda (possible solution of the radian cipher). Onewhoknows figured out the name of the owner of this little house of horror...

Callahan also was the name of Toschi in the Dirty Harry movie which was based on the Z story.

Dig the garden.



QT

Out of Total Curiosity, Sandy & I did a drive by. But No we did not dig up the garden >smile<




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PostSubject: Re: Radian info   Thu Jun 07, 2012 12:21 pm

bounce Oh, please Zamantha. Can't we Dig up the garden. You never know, what the garden of truth may hold. affraid Maybe, The Isle Of Voices
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