geocoding | 易学教程

How can I get Chinese words using Google API with JSON?

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问题 I'm using the following link. But, the result is not Chinese. My server is Amazon Web Services (AWS). 回答1: From https://developers.google.com/maps/documentation/geocoding/intro#geocoding The geocoder will do its best to provide a street address that is readable for both the user and locals. To achieve that goal, it will return street addresses in the local language, transliterated to a script readable by the user if necessary, observing the preferred language. All other addresses will be

Improve centering county names ggplot & maps

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Early I posted a question about plotting county names on a map using ggplot and maps found HERE . My first approach was to take the means of all the lat and long coordinates per county as seen here: Thankfully Andrie had 2 suggestions to improve the centering using a center of ranges and then the coord_map() {which appears to keep the aspect ratio correct}. This imporved the centering a great deal as seen here: I think this looks better but still has some difficulties with overlap problems. I am hoping to further improve the centering (In that same thread Justin suggested a kmeans approach). I

Distance between 2 geocodes

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问题 What is the formula for calculating the distance between 2 geocodes? I have seen some of the answers on this site but they basically say to rely on SQL Server 08 functions, I'm not on 08 yet. Any help would be appreciated. 回答1: Use an approximation of the earth and the Haversine formula. You can get a javascript version on the following url, which you can translate to your language of choice: http://www.movable-type.co.uk/scripts/latlong.html Here is another way: http://escience.anu.edu.au

How do I return a longitude and latitude from Google Maps JavaScript geocoder? [duplicate]

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This question already has an answer here: How do I return a variable from Google Maps JavaScript geocoder callback? 5 answers When I use the code below its alerting a blank value? why is that? HTML <body onload="initialize()"> <div id="map_canvas" style="width: 320px; height: 480px;"></div> <div> <input id="address" type="textbox" value="Sydney, NSW"> <input type="button" value="Encode" onclick="display()"> </div> </body> JavaScript var geocoder; var map; function initialize() { geocoder = new google.maps.Geocoder(); var latlng = new google.maps.LatLng(-34.397, 150.644); var myOptions = { zoom

Google maps - how to get building's polygon coordinates from address?

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问题 How to implement the following: User defines an address User defines a color Service searches for a corresponding building on the google map Service fills the found building on the map with the color I know how to: 1.find lat/long of the address 2.draw the polygon So, to do the task I need to get polygon coordinates of building from address. How to? 回答1: (1) Acquire image tile (2) Segment buildings based on pixel color (here, 0xF2EEE6). (3) Image cleanup (e.g. erosion then dilation) +

R: How to GeoCode a simple address using Data Science Toolbox

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I am fedup with Google's geocoding, and decided to try an alternative. The Data Science Toolkit ( http://www.datasciencetoolkit.org ) allows you to Geocode unlimited number of addresses. R has an excellent package that serves as a wrapper for its functions (CRAN:RDSTK). The package has a function called street2coordinates() that interfaces with the Data Science Toolkit's geocoding utility. However, the RDSTK function street2coordinates() does not work if you try to geocode something simple like City, Country . In the following example I will try to use the function to get the latitude and

R convert zipcode or lat/long to county

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I have a list of locations that contains a city, state, zip, latitude and longitude for each location. I separately have a list of economic indicators at the county level. I've played with the zipcode package, the ggmap package, and several other free geocoding websites including the US Gazeteer files, but can't seem to find a way to match the two pieces. Are there currently any packages or other sources that do this? screechOwl I ended up using the suggestion from JoshO'Brien mentioned above and found here . I took his code and changed state to county as shown here: library(sp) library(maps)

Google Maps Geocoding a string

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问题 I have done the geocoding example at: https://developers.google.com/maps/documentation/javascript/examples/geocoding-simple I want to be able to geocode a string within my code and place a marker at the location, rather than a user search a location. My code so far is: <!DOCTYPE html> <html> <head> <meta name="viewport" content="initial-scale=1.0, user-scalable=no"> <meta charset="utf-8"> <title>Geocoding service</title> <style> html, body, #map-canvas { height: 100%; margin: 0px; padding:

Get street address at lat/long pair

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I've seen that it's possible to get the latitude and longitude (geocoding, like in Google Maps API ) from a street address, but is it possible to do the reverse and get the street address when you know what the lat/long already is? The application would be an iPhone app (and why the app already knows lat/long), so anything from a web service to an iPhone API would work. Google again http://nicogoeminne.googlepages.com/documentation.html http://groups.google.com/group/Google-Maps-API/web/resources-non-google-geocoders Google now supports reverse geocoding in both JavaScript API and webservice

[Android][Google Maps]: Get the Address of location on touch

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问题 I have been googling this for hours but no luck so far. I want to get the address of the location where the map is touched / tapped. I understand that in order to get the address i need to reverse geocode the coordinates. But how do i get the coordinates from the map in the first place? 回答1: All you need to do is set up a OnMapClickListener, and then the onMapClick() override will give you a LatLng object. Then, use a Geocoder object to get the address of the point that was just clicked on.