Plus Codes appears to be a promising tool to help people locate themselves
on the planet. It looks much better than other systems like W3W, MGRS, &
Maidenhead.
I approach this as a Geospatial professional and don't quite understand the
structure yet.
Are there some graphics showing the OLC nested structure? The code isn't
helping my understanding.
I would like to be able to download GIS polygon layers of the 4, 6, and 8
digit codes.
Emmor
On Monday, October 23, 2017 at 3:55:08 AM UTC-7, Doug Rinckes wrote:
>
> Yes, or you can do it just with a couple of loops and you might not need
> the library at all. The grid size is defined in degrees, so if you wanted
> the xxxxxxxx+xx grid between 40 and 41 degrees latitude, and -122 and -121
> degrees longitude, you just need a grid spaced at 0.000125 degree intervals:
>
> for lat = 40; lat <= 41; lat = lat + .000125 {
> for lng = -122; lnt <= -121; lng = lng + .000125 {
> // lat & lng denote the SW corner of a .000125x.000125 degree area for
> 10 digit OLC resolution
> }
> }
>
> A couple of points:
>
> - if you want to draw a grid, your file will be much smaller if you
> use lines than if you use polys. A single 20x20 grid needs 42 lines, but
> 400 square polys.
> - depending on the programming language, it turns out that adding
> .000125 to a number 8000 times may experience rounding errors (hi,
> javascript!) making it very slightly less or more than the amount in the
> loop. You should be able to ignore this if you change the condition in the
> loop to something like lat <= (41 - 1e-10)
>
>
>
>
> Doug Rinckes, Technical Program Manager, Google Switzerland GmbH; 9GHJ+P88
> Zürich <https://www.google.com/maps/search/9GHJ%2BP88%20Zürich>
>
> On Mon, Oct 23, 2017 at 11:55 AM, Pablo <geogra...@gmail.com <javascript:>
> > wrote:
>
>> Ok.
>> I was thinking on something like download by OLC accuracy level, and get
>> a GIS vector file with more or less polygons /points depending on this
>> level (11, 10, 8...)
>> As I understand, by the moment the only way I can get it is specifying a
>> network of points, and generating it by myself with the libray, isn't it?
>>
>> Thanks
>>
>>
>> 2017-10-23 11:41 GMT+02:00 Doug Rinckes <drin...@google.com <javascript:>
>> >:
>>
>>> Phil's right - downloading "the grid" for an area is a bit tricky, but
>>> one thing we have been working on is providing a KML network link
>>> <https://developers.google.com/kml/documentation/kml_tut#network-links>,
>>> so that apps that support KML, like Google Earth, will be able to show a
>>> grid that depends on the zoom/area.
>>>
>>> This isn't yet ready to push out but here's a couple screenshots:
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Doug Rinckes, Technical Program Manager, Google Switzerland GmbH;
>>> 9GHJ+P88 Zürich <https://www.google.com/maps/search/9GHJ%2BP88%20Zürich>
>>>
>>> On Mon, Oct 23, 2017 at 11:06 AM, Philip Newton <philip...@gmail.com
>>> <javascript:>> wrote:
>>>
>>>> On 23 October 2017 at 10:46, Pablo Pardo <geogra...@gmail.com
>>>> <javascript:>> wrote:
>>>> > I as wondering if is
>>>> > possible to download all the grid in any GIS format (KML, geoJSON...)
>>>>
>>>> That's a bit like asking whether it's possible to download the
>>>> longitude-and-latitude grid, isn't it?
>>>>
>>>> The OLC grid is arbitrarily fine depending on how many symbols you
>>>> use, pretty much like the longitude-and-latitude grid; you would have,
>>>> for example, lines at not only 4° E and 5° E but also at 4.5° E, 4.05°
>>>> E, 4.005° E, 4.0005° E etc. etc.
>>>>
>>>> Cheers,
>>>> Philip
>>>> --
>>>> Philip Newton <philip...@gmail.com <javascript:>>
>>>>
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>>>
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