[Ssc-dev] lat long order in j3m

[David Oliver]

Once again, I'm cool with anything we'd want to do internally.  But, I'd be
at a loss to explain why we do anything other than display our data in a
way users best understand.

Well prior to the advent of computers (as in 1879), organizations like the US
Geological Survey
<http://en.wikipedia.org/wiki/United_States_Geological_Survey> were making
definitive (and binding in law, in some cases) maps of the landscape.
Here's their definition:

http://education.usgs.gov/lessons/coordinatesystems.pdf

These standards - re-published in 2013 - use latitude/longitude.




David M. Oliver | david at g <david at olivercoady.com>uardianproject.info |
http://g <http://olivercoady.com>uardianproject.info | @davidmoliver | +1
970 368 2366

On Thu, Oct 30, 2014 at 2:01 PM, Jonathan <megabulk at gmail.com> wrote:

> And then there’s this:
> http://docs.geotools.org/latest/userguide/library/referencing/order.html
> It’s a snarly situation caused by programmers deciding early on that
> latitude/longitude should conform to X/Y and thus be in the opposite order
> from what most people expect. It’s kind of a SNAFU.
>
> Svetlana, if you can return the proper lat and long from your API, I’ll be
> totally content.
>
> On Oct 30, 2014, at 10:54 AM, David Oliver <david at guardianproject.info>
> wrote:
>
> Harlo,
>
> I think it would be wise to distinguish between what is a standard in our
> internal data representation from what is displayed to users.  I've emailed
> a friend of mine with 30 years of experience in geographic information
> systems (including ESRI, the most prominent commercial GIS) and, as I
> suspected, his views align with the majority of things you see on the web
> related to display of earth-positioning data: lat/long is the order people
> are used to seeing.
>
> I looked at the GeoJSON website and see that they use terminology not
> familiar to most normal people, but probably ingrained in actual working
> cartographers (because it maps well to the idea of the Cartesian plane):
> "easting" and "northing".  In an absolutely hilarious error, this page on
> Wikipedia describes the meaning, and how to display.....then get's it
> backwards because....well, because that's what people expect: latitude,
> followed by longitude:
>
> http://en.wikipedia.org/wiki/Easting_and_northing
>
> By the way, who are "Elastic Search" and why is that of overriding
> importance to us?
>
>
>
>
>
>
> David M. Oliver | david at g <david at olivercoady.com>uardianproject.info |
> http://g <http://olivercoady.com/>uardianproject.info | @davidmoliver | +1
> 970 368 2366
>
> On Thu, Oct 30, 2014 at 11:53 AM, Harlo Holmes <harlo.holmes at gmail.com>
> wrote:
>
>> Actually, the order is Lon, Lat, to conform to GeoJSON standards (which
>> is required by Elasticsearch.)
>>
>> On Thu, Oct 30, 2014 at 11:52 AM, David Oliver <
>> david at guardianproject.info> wrote:
>>
>>> Agreed - the order is LAT, LONG
>>>
>>> more info: http://www.geomidpoint.com/latlon.html
>>>
>>>
>>>
>>> David M. Oliver | david at g <david at olivercoady.com>uardianproject.info |
>>> http://g <http://olivercoady.com/>uardianproject.info | @davidmoliver | +1
>>> 970 368 2366
>>>
>>> On Thu, Oct 30, 2014 at 10:53 AM, Svetlana Chirkova <schirkova at gmail.com
>>> > wrote:
>>>
>>>> Hi guys, just wanted to confirm that standard/convention of gps
>>>> coordinates ordering (lat,lon vs lon,lat)
>>>>
>>>> i always thought it was lat, lon (
>>>> http://stackoverflow.com/questions/7309121/preferred-order-of-writing-latitude-longitude-tuples
>>>> )
>>>>
>>>> but j3m is lon,lat at the moment.
>>>>
>>>> just wanted to confirm that:
>>>> - it's suppuposed to be 'long,lat'
>>>> - j3m will continie to be 'long,lat'
>>>>
>>>> ?
>>>>
>>>> where am i...
>>>>
>>>> Thanks!
>>>>
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>>>
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