[MLB-WIRELESS] Tool for checking LOS between nodes

Morgan Reed morgan.s.reed at gmail.com
Mon Jan 2 17:14:08 AEDT 2017

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/mw
>>> Los/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
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