geocoding

问题 I'm creating an application with google maps api with geocoding functionality. Obviously, I want to use the api that is the most accurate. I'm giving the application an address and I need to find it on a map, but I would be ok with just finding the latitude and longitude, and then I can use that to incorporate it into whatever map api I choose. Out of your experience, which api is the most accurate? Google, Yahoo, Bing, etc. And if you could give an approximate percentage that would be great.

问题 We are building a service that uses location-based pricing. The user can input an address and see prices in his area as determined by various server-side algorithms. It is then possible to order items based on these prices. I'm trying to figure out if there is a way we can use client-side geocoding in this scenario (to avoid hitting Google Maps API usage limits), e.g. the user enters his address and the browser fetches the geocode result using the JS library and includes it in the form

问题 OK, here's what I want to implement and I need your ideas : Input a geo location by name/address/etc (e.g. London, Oxford Street 20 ) Get the point's longitude/latitude My Questions : How would you go about that? Is using Google Maps API (that's what I first thought of) my only solution? It'd be better if the service used CAN be freely integrated in a commercial app - so any idea is welcome... :-) 回答1: There is a built in API for that. For iOS 5 and newer you can use CLGeocoder and for older

问题 I am calculating center Lat/Lng fron list of available Lat/Lng using C# and rendering on OpenLayer Map. I observed the calculation of getting center lat/lng will give me slightly difference in lat/lng . I am referring this link for the calculation Calculate the center point of multiple latitude/longitude coordinate pairs. C# Code: static void Main(string[] args) { List<GeoCoordinate> listCoordinate = new List<GeoCoordinate>(); listCoordinate.Add(new GeoCoordinate() { Latitude = 22.9833,

问题 I recently posted a question regarding plotting postions on cities in europe as points on a map. See R, get longitude/latitude data for cities and add it to my dataframe cities xlsx file contains about 20000 cities in europe. I got an error message when trying to find the latitude/longitude data using geocode. I have inserted part of the code below: cities <- read.xlsx("EU_city.xlsx",1) # get frequencies freq <- as.data.frame(table(cities)) library(plotrix) freq$Freq <- rescale(freq$Freq, c(1

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 3 years ago . Does anyone know of any open RESTful API that I can call to geocode a user's IP to the latitude and longitude? Ideally, it would be something like: http://google.com/geocode_api/?IP=1.2.3.4 and it would return the latitude and longtitude. 回答1: Another free REST API with city accurate information would be http:/

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . I have the following dataset for California housing data: head(calif_cluster,15) MedianHouseValue MedianIncome MedianHouseAge TotalRooms TotalBedrooms Population 1 190300 4.20510 16 2697.00 490.00 1462 2 150800 2.54810 33 2821.00 652.00 1206 3 252600 6.08290 17 6213.20 1276.05 3288 4 269700 4.03680 52 919.00 213

问题 I have being playing around with MapBox and I am having some issues with getting the GeoLocation API to send data back to the map and update the it. This is what I got right now: mapboxgl.accessToken = 'TOKEN-HERE'; var map = new mapboxgl.Map({ container: 'map', // container id style: 'mapbox://styles/mapbox/streets-v9', center: [-0.968539, 54.562917], zoom: 9 }); map.on('style.load', function() { map.addSource("myMap", { "type": "geojson", "data": "https://api.mapbox.com/geocoding/v5/mapbox

问题 I have being playing around with MapBox and I am having some issues with getting the GeoLocation API to send data back to the map and update the it. This is what I got right now: mapboxgl.accessToken = 'TOKEN-HERE'; var map = new mapboxgl.Map({ container: 'map', // container id style: 'mapbox://styles/mapbox/streets-v9', center: [-0.968539, 54.562917], zoom: 9 }); map.on('style.load', function() { map.addSource("myMap", { "type": "geojson", "data": "https://api.mapbox.com/geocoding/v5/mapbox

问题 I'm looking for a GeoCoding provider for two purposes: Address parsing (convert a long String into address components) Address validation (make sure the address really exists) I need to support North America addresses first, but keep the door open for international addresses as well. I won't be displaying this information on a map or in a webapp, which puts me in a bit of a bind because services like Google Maps and Yahoo Maps require you to display any information you look up on their