A fast, offline reverse geocoder in Python

#1

Post by jp_sc » Sat, Mar 28, 2015, 12:02 PM UTC

A fast, offline reverse geocoder in Python
github.com

Re: A fast, offline reverse geocoder in Python

#2

Post by zetahunter » Sat, Mar 28, 2015, 12:38 PM UTC

Awesome, one more thing that can be made standalone instead of using google maps service.

Re: A fast, offline reverse geocoder in Python

#3

Post by thampiman » Sat, Mar 28, 2015, 12:40 PM UTC

zetahunter wrote: post #2

Awesome, one more thing that can be made standalone instead of using google maps service.

Thanks! I'm the developer of this library and I hope you find it useful.

Re: A fast, offline reverse geocoder in Python

#4

Post by dexterbt1 » Sat, Mar 28, 2015, 12:47 PM UTC

Starred. We're currently using nominatim + osm data + postgis on our own hosted servers. Can this be a good alternative?

Re: A fast, offline reverse geocoder in Python

#5

Post by sandstrom » Sat, Mar 28, 2015, 12:50 PM UTC

Looks really interesting!

Would it be possible to use OpenStreetMap data?

http://planet.openstreetmap.org/

Re: A fast, offline reverse geocoder in Python

#6

Post by thampiman » Sat, Mar 28, 2015, 12:52 PM UTC

dexterbt1 wrote: post #4

Starred. We're currently using nominatim + osm data + postgis on our own hosted servers. Can this be a good alternative?

I should think so. I've tried nominatim/osm data but it took forever to query a large set of coordinates. I was only interested in knowing the nearest city and admin regions 1/2. And this library is really fast... ~20s to lookup 10M coordinates on my MBP. If you'd however like to know the full address, then this is maybe not a good idea.

Re: A fast, offline reverse geocoder in Python

#7

Post by mcbetz » Sat, Mar 28, 2015, 12:52 PM UTC

Very good companion for Geocoder - https://github.com/DenisCarriere/geocoder. Glad to see Python getting more geo libraries for Non-GIS users.

Re: A fast, offline reverse geocoder in Python

#8

Post by ldng » Sat, Mar 28, 2015, 12:56 PM UTC

dexterbt1 wrote: post #4

Starred. We're currently using nominatim + osm data + postgis on our own hosted servers. Can this be a good alternative?

For reverse geocoding only as it does not seem to do geocoding proper. Pelias[1] might be a better alternative once they simplified the install process. I had to "reverse engineer" (aka read and understand) their chef cookbook as a Vagrant was not an option form me. Not that complicated but time consuming when don't know Chef.

[0] - https://github.com/pelias

Re: A fast, offline reverse geocoder in Python

#9

Post by thampiman » Sat, Mar 28, 2015, 12:56 PM UTC

sandstrom wrote: post #5

Looks really interesting! Would it be possible to use OpenStreetMap data? http://planet.openstreetmap.org/

That is interesting. I haven't looked at that data set. At the moment, this only looks at cities with a population > 1000 obtained from GeoNames.

Re: A fast, offline reverse geocoder in Python

#10

Post by dexterbt1 » Sat, Mar 28, 2015, 1:04 PM UTC

thampiman wrote: post #6

dexterbt1 wrote: post #4

Starred. We're currently using nominatim + osm data + postgis on our own hosted servers. Can this be a good alternative?

I should think so. I've tried nominatim/osm data but it took forever to query a large set of coordinates. I was only interested in knowing the nearest city and admin regions 1/2. And this library is really fast... ~20s to lookup 10M coordinates on my MBP. If you'd however like to know the full address, then this is maybe not a good idea.

That's fast. Though yes, our use case involves reverse geo of full street level addresses. Currently we do several 10s to 100s of req/s on nominatim.

The sibling thread asked about using OSM data; it'd be awesome if street level OSM data is workable.