reverse-geocoding

Reverse- geocoding: How to determine the city closest to a (lat,lon) with BigQuery SQL?

由 烈酒焚心 提交于 2019-12-01 02:58:31
问题 I have a huge collection of points - and I want to determine the closest city to each point. How can I do this with BigQuery? 回答1: This is the best performing query we've worked out so far: WITH a AS ( # a table with points around the world SELECT * FROM UNNEST([ST_GEOGPOINT(-70, -33), ST_GEOGPOINT(-122,37), ST_GEOGPOINT(151,-33)]) my_point ), b AS ( # any table with cities world locations SELECT *, ST_GEOGPOINT(lon,lat) latlon_geo FROM `fh-bigquery.geocode.201806_geolite2_latlon_redux` )

Reverse geocoding with big array is fastest way? - javascript and performance

由 我的未来我决定 提交于 2019-12-01 00:41:06
I have many points on Google Maps and I want to show for each point the nearest city (so a reverse geocoding). I have a multidimensional array like this: citta_vicine = []; var comuni = [ ["Abano Terme (PD)",45.3594,11.7894], ["Abbadia Cerreto (LO)",45.3122,9.5928], ["Abbadia Lariana (LC)",45.8992,9.3336], ["Abbadia San Salvatore (SI)",42.8800,11.6775], ["Abbasanta (OR)",40.1250,8.8200] ] //city, latitude, longitude The problem is that my array has all city of Italy (8000 !) and is 300 Kb. To get nearest city i can use this: //this line will be inside for loop of points var city_near=

Using Task.wait() application hangs and never returns

由 旧街凉风 提交于 2019-11-30 23:56:48
问题 I am new to C# and using Task . I was trying to run this application but my application hangs every time. When I am adding task.wait() , it keeps waiting and never returns. Any help is much appreciated. EDIT: I want to call DownloadString Asynchronously. And when I am doing task.Start() as suggested by "Austin Salonen" I don't get the address of location but default value in location string from returnVal. It means that location got value assigned before task got completed. How can I make

Obtaining State abbreviation from getAdminArea();

由 为君一笑 提交于 2019-11-30 23:18:57
问题 I've attempted two different ways in trying to obtain the city name as well as the state abbreviation only from the Address class, with no luck. The first is returning the State like so "CA 92055" with the zip code, and the second attempt returns the full State name. Any quick ways around this? First attempt which the state ends up returning "CA 92055" (Zip followed after the abbrev) Geocoder geoCoder = new Geocoder(getActivity(), Locale.getDefault()); List<Address> addresses; try { addresses

Reverse geocoding with big array is fastest way? - javascript and performance

由 邮差的信 提交于 2019-11-30 20:40:57
问题 I have many points on Google Maps and I want to show for each point the nearest city (so a reverse geocoding). I have a multidimensional array like this: citta_vicine = []; var comuni = [ ["Abano Terme (PD)",45.3594,11.7894], ["Abbadia Cerreto (LO)",45.3122,9.5928], ["Abbadia Lariana (LC)",45.8992,9.3336], ["Abbadia San Salvatore (SI)",42.8800,11.6775], ["Abbasanta (OR)",40.1250,8.8200] ] //city, latitude, longitude The problem is that my array has all city of Italy (8000 !) and is 300 Kb. To

how to find continent in particular location using Geocoder in android app

由 可紊 提交于 2019-11-30 15:44:02
问题 i am developing android application using Geocoder services, I have an application where I try to get address of a location based on the latitude,longitude coordinates its working fine. my problem is how to get continent of particular address. example : double lat=17; double lon=78.49; List addresses = new Geocoder(Shout.this,Locale.getDefault()).getFromLocation(lat, lon, 1); i am using this code output is India,Hyderabad this address related how to find continent ,please help me some

how to find continent in particular location using Geocoder in android app

由 二次信任 提交于 2019-11-30 14:24:10
i am developing android application using Geocoder services, I have an application where I try to get address of a location based on the latitude,longitude coordinates its working fine. my problem is how to get continent of particular address. example : double lat=17; double lon=78.49; List addresses = new Geocoder(Shout.this,Locale.getDefault()).getFromLocation(lat, lon, 1); i am using this code output is India,Hyderabad this address related how to find continent ,please help me some valuable solution. i am getting country name dynamically using geocoder is their any chance to get in

How to get city from coordinates?

由 女生的网名这么多〃 提交于 2019-11-30 08:30:49
问题 I use google maps api 3 to get city from coordinates. I read the ReverseGeocoding but I did not understand how to have the correct city value from this type of result: http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=false 回答1: this Funktion returns the Name of a requested City at lat/long. As this Script is from end of 2012. Worked fine for me that time. Returns "unknown" when the API doesn't find any. function get_api ($lat, $long) { $get_API = "http:/

Loop for Reverse Geocoding in R

由 ￡可爱￡侵袭症＋ 提交于 2019-11-30 08:19:51
问题 I am trying to reverse geocode a large data-set (around 100k). I used the revgeocode function from the package ggmap . I got the result for 1 entry 48 Grand View Terrace, San Francisco, CA 94114, USA 48 Grand View Terrace Eureka Valley San Francisco San Francisco County California United States postal_code postal_code_suffix , but I need to automate the process and use it for the entire data-set. I tried r <- lapply(revgeocode(location = (c(z$lon),c(z$lat)), output = "more", messaging = FALSE

Reverse geo location using OpenStreetMap [closed]

由 爷，独闯天下 提交于 2019-11-29 20:16:39
I have used OpenStreetMap in my ongoing website. I have developed website using PHP. My requirement is to get ADDRESS based on Geo Location(Latitude & Longitude). Is there any OpenStreetMap API available to get location info based on Lat/Lon? Thanks, Vishal Parmar There are multiple reverse geocoding APIs available for OpenStreetMap (since the data is open-source, anyone can build one). The two that I would recommend you investigate further are: Nominatim, run by a member of the OSM community as a volunteer project. Reverse Geocoding documentation CloudMade Geocoding, run as a commercial
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