Question

如何在不使用谷歌地图的情况下获取特定城市或街道或位置的纬度和经度？例如，用户输入的城市名称是“Chennai”，我只需要显示该城市的纬度和经度。怎么做？

Answer 1

这称为地理编码，需要将地名与纬度和经度相匹配。

您可以将已知的地名/纬度列表编码到您的应用中，在运行时读取它们并在需要时搜索它们，或者您可以使用在线地理编码服务，例如this one from Yahoo，或者this one from Google

Answer 2

在维基百科页面上查看Obtaining geographic coordinates

Answer 3

Google提供反向地理编码 - 请通过this链接

例如，下面的web服务为您提供参数中提供的lat long的地址但是响应在json中，请参阅this link

如果您想在xml中获得响应，请检查here

Answer 4

我有同样的问题..最后我通过从服务器端获取lat long来修复它。 This链接包含从java获取lat和long的示例代码。希望它有所帮助。

private static final String GEOCODE_REQUEST_URL = "http://maps.googleapis.com/maps/api/geocode/xml?sensor=false&";
    private static HttpClient httpClient = new HttpClient(new MultiThreadedHttpConnectionManager());
    String strLatitude;
    String strLongtitude;
        public void getLongitudeLatitude(String address) {
            try {
                StringBuilder urlBuilder = new StringBuilder(GEOCODE_REQUEST_URL);
                if (StringUtils.isNotBlank(address)) {
                    urlBuilder.append("&address=").append(URLEncoder.encode(address, "UTF-8"));
                }

                final GetMethod getMethod = new GetMethod(urlBuilder.toString());
                try {
                    httpClient.executeMethod(getMethod);
                    Reader reader = new InputStreamReader(getMethod.getResponseBodyAsStream(), getMethod.getResponseCharSet());

                    int data = reader.read();
                    char[] buffer = new char[1024];
                    Writer writer = new StringWriter();
                    while ((data = reader.read(buffer)) != -1) {
                            writer.write(buffer, 0, data);
                    }

                    String result = writer.toString();
                    System.out.println(result.toString());

                    DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
                    DocumentBuilder db = dbf.newDocumentBuilder();
                    InputSource is = new InputSource();
                    is.setCharacterStream(new StringReader("<"+writer.toString().trim()));
                    Document doc = db.parse(is);

                    strLatitude = getXpathValue(doc, "//GeocodeResponse/result/geometry/location/lat/text()");
                    System.out.println("Latitude:" + strLatitude);

                    strLongtitude = getXpathValue(doc,"//GeocodeResponse/result/geometry/location/lng/text()");
                    System.out.println("Longitude:" + strLongtitude);


                } finally {
                    getMethod.releaseConnection();
                }
            } catch (Exception e) {
                 e.printStackTrace();
            }
        }

        private String getXpathValue(Document doc, String strXpath) throws XPathExpressionException {
            XPath xPath = XPathFactory.newInstance().newXPath();
            XPathExpression expr = xPath.compile(strXpath);
            String resultData = null;
            Object result4 = expr.evaluate(doc, XPathConstants.NODESET);
            NodeList nodes = (NodeList) result4;
            for (int i = 0; i < nodes.getLength(); i++) {
                resultData = nodes.item(i).getNodeValue();
            }
            return resultData;


    }

如何在不使用谷歌地图的情况下获取特定城市或街道的纬度和经度？

4 个答案: