Of course! :)
Dividing is the easy part:
- If you have some plus code (for example of length 8, *66FF88XX+*), you
can replace pairs of characters with '0' to get another plus code for a
larger area that contains the original area: *66FF8800+*, *66FF+*,
*6600+*
- Likewise, if you have a plus code for a larger area (say, *66FF8800+*),
you can generate the codes for all 20x20 sub-blocks simply by iterating
through all possible pairs of code characters (*"23456789CFGHJMPQRVWX"*)
and replacing the '0' characters with that:
*66FF88**22+*
*66FF88**23+*
*66FF88**24+*
*...*
*66FF88**2X+*
*66FF88**32+*
*...*
*66FF88**XX+*
Now, finding out which of these code areas overlap with your feature can be
a bit more tricky, depending on how you've defined your feature. For purely
geometrical definitions of the feature (like origin/radius of a circle, or
polygon), the best approach might be to look at various intersection
algorithms. For other, more arbitrary definitions (like "surface area of
$city"), other approaches might work better. In any case, the important
thing to keep in mind here is the fact that the area of any plus code is
simply a box aligned with the latitude/longitude grid, with just four
important values (minimum/maximum latitude, minimum/maximum longitude).
On Saturday, January 27, 2018 at 1:33:26 PM UTC+1, HANUMAN ACHOLIA wrote:
>
> Can you please explain this in details. I am new this area.
> If i choose 6 code length then i will cover 5500 meter and its give me
> only one olc string.
> 1. How i can find and list all olc codes which have at least a bit of your
> feature.?
> 2. How to divide them into 20*20 blocks and check that contains the
> feature or not ?
>
> Any help appreciated :)
>
--
Public site: http://www.openlocationcode.com/
Github project: https://github.com/google/open-location-code
Demo site: http://plus.codes/
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