Returning coordinates at the correct side of the street about api

[lucas-abbate]

I've seen the parity thing. Is there a way to find out on whick side the linestring starts and then define left or right?
Maybe the linestrings could be arbitrarily defaulted to start always on the same side (i.e, the southern dot of the linestring is always the start). Then, all left or right side could be normalized (but I don't know if it is possible to arbitrarily define the starting point of the linestring).
Anyways. Thanks for the help!

[missinglink]

Have a look at https://github.com/pelias/interpolation

[lucas-abbate]

Isn't that what I've done when installing Pelias??

[missinglink]

Pelias is composed of several smaller components, the interpolation service is a SQLite database which is built independently of the elasticsearch index.

So while the interpolation database preserves the side of the street (what is called 'parity' in the SQLite database) it's not exposed to other services as this requirement has never been requested before.

If you have installed Pelias using the pelias/docker utility then you will find the address.db and street.db SQLite databases in your configured DATA_DIR.

I recommend you have a look in the address.db as it likely has the information you require.

[missinglink]

Out of curiosity; how do you define 'left' and 'right'?
We base it on the bearing from the start point to the end point of the linestring, but this can obviously be reversed and therefore return the opposite classification, do you have a suggestion of how best to normalize this?

[missinglink]

No problem, please close this issue if you found a solution.

[missinglink]

Like you mentioned, you could (for instance) select the most southerly point as the starting point, it would make the calculation deterministic but I don't think that would guarantee that Argentine addresses are given the correct parity.

I was wondering if the Argentinian authority has some sort of official policy in this regard about which is the start and the end of a street?