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[mkgmap-dev] splitter and options --description / --geonames-file

From Randolph J. Herber army.bronze.star at gmail.com on Wed Apr 8 14:13:41 BST 2020

Hi, all,

The Definition of Google Plus Codes, a.k.a. Opern Location Codes, can be 
found at https://en.wikipedia.org/wiki/Open_Location_Code

The complete code also specifies, by its length, the size of the area 
being described. When using them in splitter, I have never seen a tile 
whose code was longer than 8 characters, an area 250m east to west and 
125m north to south. I use the largest OLC centered on the tile in 
question that fits within the tile.

Randolph J. Herber

On 4/8/2020 4:59 AM, Ticker Berkin wrote:
> Hi Gerd
> I'd say that if the splitter is going to generate descriptions per tile
> (geonames) it should generate one for each tile and, if there isn't a
> centre of a city within the tile and no default description, it should
> use a modified form of the nearest city to make it unique from a
> possible adjacent tile that might use the same city.
> Maybe something like "GB-~Basingstoke", but no solution is ideal and
> there could still be duplicates.
> The splitter could keep track of which names were have been used and,
> for the ones outside the tile, added an increasing suffix number, so
> would have "GB-Basingstoke-2" etc
> Ticker
> On Wed, 2020-04-08 at 08:38 +0000, Gerd Petermann wrote:
>> Hi all,
>> this is a follow up of http://gis.19327.n8.nabble.com/documentation-i
>> mprovement-tp5962609p5962747.html
>> Since I don't use these options for my maps I am unsure what is best.
>> The --geonames-file option tries to find a city within the calculated
>> tile. If none is found it either writes the value
>> given with --description or just a comment.
>> I think it would be best to always write the nearest city.
>> Gerd
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