[MLB-WIRELESS] Tool for checking LOS between nodes

Daurnimator quae at daurnimator.com
Mon Jan 2 22:49:17 AEDT 2017


Yeah I found the site sometimes breaks like that.
I re-imported the tower data: that seemed to fix it (possibly only
temporarily?).

On 2 January 2017 at 19:28, Morgan Reed <morgan.s.reed at gmail.com> wrote:
> One oddity I'm noticing, I've got a lot of nodes on which the profile looks
> 100% clear (nothing at all in the Fresnel zone), but the connection is shown
> as <100% (and in several cases 0%, so fully obstructed).
>
> Is it looking at something in addition to what's shown in the profile?
>
> On Mon, Jan 2, 2017 at 6:14 PM, Morgan Reed <morgan.s.reed at gmail.com> wrote:
>>
>> That's WAY nicer than what I found elsewhere on their site, thanks.
>>
>> On Mon, Jan 2, 2017 at 5:52 PM, Daurnimator <quae at daurnimator.com> wrote:
>>>
>>> We also have a shared 'wisp' account for http://wisp.heywhatsthat.com/
>>>
>>> I'll email you some creds off-list.
>>>
>>> On 2 January 2017 at 17:49, Morgan Reed <morgan.s.reed at gmail.com> wrote:
>>> > Ah, I presume you mean this;
>>> > http://www.heywhatsthat.com/profiler.html
>>> >
>>> > I feel less bad about how ugly my tool is now ;)
>>> >
>>> > On Mon, Jan 2, 2017 at 5:14 PM, Morgan Reed <morgan.s.reed at gmail.com>
>>> > wrote:
>>> >>
>>> >> Rummaged around the website a bit only thing I've found is broken
>>> >> links,
>>> >> care to point me in the right direction?
>>> >>
>>> >> On Mon, Jan 2, 2017 at 5:09 PM, Morgan Reed <morgan.s.reed at gmail.com>
>>> >> wrote:
>>> >>>
>>> >>> Would've been nice if I'd have found that yesterday...
>>> >>>
>>> >>> On Mon, Jan 2, 2017 at 5:04 PM, Mitch Kelly <mitchkelly24 at gmail.com>
>>> >>> wrote:
>>> >>>>
>>> >>>> The hey what's that path profiler does all of that and more
>>> >>>> including
>>> >>>> frequency and fresnel zone
>>> >>>>
>>> >>>> On 2 Jan 2017 2:02 PM, "Morgan Reed" <morgan.s.reed at gmail.com>
>>> >>>> wrote:
>>> >>>>>
>>> >>>>> Hi All,
>>> >>>>>
>>> >>>>>        I was a MW member some many (10+) years ago, but never
>>> >>>>> actually
>>> >>>>> got around to doing anything about setting up a node (Partially
>>> >>>>> lack of
>>> >>>>> funds, but mostly because there wasn't anything in LOS from that
>>> >>>>> place.)
>>> >>>>>
>>> >>>>> Many years on, the other day I was reminded by the DuxTel website
>>> >>>>> that
>>> >>>>> MW exists. Figured I'd stick my head back in, though I'm not sure
>>> >>>>> how much
>>> >>>>> activity there is in the community these days (the Website and
>>> >>>>> Mailing List
>>> >>>>> archives seem to suggest it's a bit of a ghost town).
>>> >>>>>
>>> >>>>> In anticipation of perhaps finally setting up a node I did some
>>> >>>>> rummaging around to try to determine what nodes were within LOS
>>> >>>>> from my
>>> >>>>> current location, after an initial aborted attempt with Google
>>> >>>>> Earth
>>> >>>>> (seriously, who the hell implements a pathing function which
>>> >>>>> DOESN'T snap to
>>> >>>>> markers, oh and the elevation profile of a path ignores the
>>> >>>>> elevation of the
>>> >>>>> coordinates provided...), I spent a bit of time cooking this up
>>> >>>>> today;
>>> >>>>>
>>> >>>>> https://tools.darkglade.com/mwLos/
>>> >>>>>
>>> >>>>> It's pretty ugly and the code is horrible (I might fix it one day),
>>> >>>>> but
>>> >>>>> it pretty much works.
>>> >>>>>
>>> >>>>> The only nodes it loads automagically are the ones in the Geelong
>>> >>>>> region because that's where I live (if somebody wants to give me a
>>> >>>>> full list
>>> >>>>> of the active nodes, ideally in this format
>>> >>>>> https://tools.darkglade.com/mwLos/nodes.json (or access to a
>>> >>>>> database that
>>> >>>>> has the data in it) I'll happily stuff that in the back).
>>> >>>>>
>>> >>>>> The chart down the bottom shows LOS (red), actual ground level
>>> >>>>> elevation (blue), the two green traces are the ground level
>>> >>>>> elevation lifted
>>> >>>>> 4m (nominal height of a single storey building) and 7m (nominal
>>> >>>>> height of a
>>> >>>>> double-storey building) so you can tell more or less if you
>>> >>>>> actually have
>>> >>>>> LOS over surrounding buildings (at least if you're not surrounded
>>> >>>>> by
>>> >>>>> highrises).
>>> >>>>>
>>> >>>>> I arbitrarily picked two nodes in Geelong city for the initial
>>> >>>>> start/end point, but if you plug your lat/long/alt (height of your
>>> >>>>> antenna
>>> >>>>> above ground) into the "Start" fields and hit "Update" you can then
>>> >>>>> click
>>> >>>>> around the other nodes to see the terrain profile between you and
>>> >>>>> them. The
>>> >>>>> "End" fields will allow you to plot to arbitrary coordinates if you
>>> >>>>> want to
>>> >>>>> see something that's not already on the map.
>>> >>>>>
>>> >>>>> One warning though, it won't be terribly accurate over long
>>> >>>>> distances,
>>> >>>>> as the Elevation API is limited to 512 points per request, as such
>>> >>>>> long
>>> >>>>> distances may be problematic (should be pretty good to ~5km
>>> >>>>> though), if I
>>> >>>>> can be bothered (and assuming there's a decent path splitting
>>> >>>>> algorithm
>>> >>>>> available in the APIs) I might fix that by breaking the paths down
>>> >>>>> into
>>> >>>>> smaller chunks and querying them separately.
>>> >>>>>
>>> >>>>> Figured it might be useful for other people.
>>> >>>>>
>>> >>>>> Morgan
>>> >>>>>
>>> >>>>>
>>> >>>>> _______________________________________________
>>> >>>>> Melbwireless mailing list
>>> >>>>> Melbwireless at lists.wireless.org.au
>>> >>>>> https://lists.wireless.org.au/mailman/listinfo/melbwireless
>>> >>>>>
>>> >>>
>>> >>>
>>> >>>
>>> >>> --
>>> >>> "They that can give up essential liberty to obtain a little temporary
>>> >>> safety deserve neither liberty nor safety."
>>> >>> -- Benjamin Franklin, 1759
>>> >>
>>> >>
>>> >>
>>> >>
>>> >> --
>>> >> "They that can give up essential liberty to obtain a little temporary
>>> >> safety deserve neither liberty nor safety."
>>> >> -- Benjamin Franklin, 1759
>>> >
>>> >
>>> >
>>> >
>>> > --
>>> > "They that can give up essential liberty to obtain a little temporary
>>> > safety
>>> > deserve neither liberty nor safety."
>>> > -- Benjamin Franklin, 1759
>>> >
>>> > _______________________________________________
>>> > Melbwireless mailing list
>>> > Melbwireless at lists.wireless.org.au
>>> > https://lists.wireless.org.au/mailman/listinfo/melbwireless
>>> >
>>
>>
>>
>>
>> --
>> "They that can give up essential liberty to obtain a little temporary
>> safety deserve neither liberty nor safety."
>> -- Benjamin Franklin, 1759
>
>
>
>
> --
> "They that can give up essential liberty to obtain a little temporary safety
> deserve neither liberty nor safety."
> -- Benjamin Franklin, 1759


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