[Leica] Antenna vs. roof

[Frank Filippone]

I agree with the logic that Don uses.  Standard construction gives 
standard heights.  The question is if the pitch on your roof is 
substantially different from your neighbor's.

We are all assuming your house is 2 story, like your neighbor's.  True?

I do not believe that your sight lines are in the right place.
First take the picture you drew and start your lines over again.  Use 
the first floor windows or, better yet,, the top of the front doors to 
establish your reference line.  Second line is parallel to the first but 
starts at the top of the antenna mount.

It might be enlightening to take a picture of your house between your 
neighbors... 3 houses wide..... Mark your lines as noted above between 
the 2 other houses.  This would eliminate all the distortions stuff and 
roof pitch questions.

Or, as another has suggested... climb up there and get out your 
Engineer's Transit ( you do have one, right?) and sight it that way.... 
or use the laser level.

As you are most likely north of 50 years old, I suggest the safest 
technique to be re-analysis and a 3 house photo.

Note: Leica makes Thedolites.  Laser Thedolites.  We are back IN topic.

https://leica-geosystems.com/en-us/products



Frank Filippone
BMWRed735i at Gmail.com

On 3/9/2021 5:30 PM, Don Dory via LUG wrote:
> Based on standard construction heights your antennae is below their roof
> unless your antebellum exceeds ten feet in height.   I would just raise
> your antenna several feet and you week be good.   You have a low pitch roof
> so working from your roof wouldn't be Rio bad.
> 
> On Tue, Mar 9, 2021, 9:00 PM Peter Klein via LUG <lug at leica-users.org>
> wrote:
> 
>> This is sort of off-topic, but does involve photography. Is the top of
>> my roof tower a bit higher than my neighbor's roof, as it appears to be?
>> Or does my iPhone 7 camera's distortion or where I stood make the
>> picture meaningless? This is significant because I'm thinking of putting
>> up a directional antenna for VHF (ham radio), and having a unobstructed
>> view of the horizon is very desirable.
>> <
>> http://gallery.leica-users.org/v/pklein/temp/IMG_1036RoofAntennas-w.jpg.html
>>>
>>
>> If you know of a reasonably easy way to determine this without expensive
>> surveyor's tools, please tell. ("Brother, can you spare a Theodolite?")
>>
>> Background:  When the roof tower was installed, the house on the left
>> was a one-story rambler. Now it's a McMansion.
>>
>> --Peter
>>