Faceting by geolocation in Elasticsearch (clustering) -


i have project enables users search pois using elasticsearch, , can filter number of different attributes, including location. i'd add faceting of filters, of categorical variables faceting perfect. however, want users able facet location/city/metro area. each location lat/long pair.

from research, seems best approach use k-means clustering of lat/long pairs common groupings of locations faceting. once have groupings, want provide commonly recognizable name area (e.g., if "brooklyn" center of cluster, i'd want provide name "new york city").

(a) can geo-clustering (k-means, or other way) done in elasticsearch allow faceting location? if so, how? if not, can done in postgres instead? (b) how can make sure i'm providing recognizable political name given region returned clustering?

given lat/long (or address) input, can use google maps geocoding api retrieve (and index) specific hierarchically-scoped labels for:

  • country
  • administrative_area_level_1 (state: in us)
  • administrative_area_level_2 (county: in us)
  • sublocality_level_1 (borough: in nyc)
  • administrative_area_level_3 (city: in us)
  • locality (neighborhood: in us)

if you're building out yelp or airbnb-like search interface zoom-map component, can choose location facet display based diversity criteria:

e.g. request 6 term facets, display 1 appropriate selection diversity (say 2-10 terms) ... example, if zoom level (and bounding box) includes brooklyn, manhattan , staten island, you'll see following:

  • country (united states) ... ignore, broad
  • administrative_area_level_1 (new york) ... ignore, broad
  • administrative_area_level_2 (kings county, new york county, richmond county) ... ignore (just in case of nyc sublocality_level_1 more commonly used)
  • sublocality_level_1: (brooklyn, manhattan, staten island) ... appropriately specific, show this!
  • administrative_area_level_3 (new york city) ... ignore, broad
  • locality (<100s of neighborhoods>) ... ignore, narrow

Comments

Post a Comment

Popular posts from this blog

javascript - jQuery: Add class depending on URL in the best way -

i have html progress meter: <div class="col-md-3" style="margin-left: -20px;"> <div class="progress-pos active" id="progess-1"> <div class="progress-pos-inner"> login </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-2"> <div class="progress-pos-inner"> scan items </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-3"> <div class="progress-pos-inner"> confirm address </div> </div> </div> <div class="col-md-3 progress-pos-container"> <div class="progress-pos" id="progess-4"> <div class="progress-pos-in
Read more

caching - How to check if a url path exists in the service worker cache -

i need check if particular url path exists in service worker cache. example, suppose url is: /myserviceworker/service?a=110&b=70 this url exists in cache, there many of them different values of , b. now, suppose want refresh of these urls, how can that? i want know how access key values service worker cache. if know key, plan follows: var url = new url(key); if(url.pathname === "\/myserviceworker/service") refetch key but not sure how cache key , in format is. mean, string or url? cache api has match() method returns promise resolving in response object if match or undefined if no match exists. second parameter object can specify ignoresearch not take account url parameters. the ignoresearch option supported firefox ( chrome status here ). in other hand, retrieve cache entries, can use keys() method.
Read more

Redirect to a HTTPS version using .htaccess -

i need modify .htaccess file redirect urls https version without "www". http://example.com --> https://example.com http://www.example.com --> https://example.com https://www.example.com --> https://example.com this how .htaccess file looks like: rewriteengine on rewritecond %{request_filename} !-d rewritecond %{request_filename} !-f rewriterule ^(.*)$ redirect.php?id=$1&page=$2 [qsa,l] what modifications need make .htaccess in order forward https without "www"? it depends on doing current code. looks file called redirect trying display php page seo friendly url. think might confusing people. anyway, need , force https without www, need 1 more rule above. also second rule needs two capture groups in rewriterule test string because wanting 2 different values using $1 , $2 references. rewriteengine on #rediect www non www and/or http https --- combinations. rewritecond %{http_host} !^example\.com [nc,or] rewritecond %{https} !^
Read more