给定一个位置的经度和纬度，如何知道该位置的有效时区?
在大多数情况下，我们正在寻找IANA/Olson时区id，尽管有些服务可能只返回UTC偏移量或其他一些时区标识符。详细信息请阅读时区标签信息。
当前回答
如果您想使用geonames.org，请使用这段代码。(但是geonames.org有时很慢)
String get_time_zone_time_geonames(GeoPoint gp){
String erg = "";
double Longitude = gp.getLongitudeE6()/1E6;
double Latitude = gp.getLatitudeE6()/1E6;
String request = "http://ws.geonames.org/timezone?lat="+Latitude+"&lng="+ Longitude+ "&style=full";
URL time_zone_time = null;
InputStream input;
// final StringBuilder sBuf = new StringBuilder();
try {
time_zone_time = new URL(request);
try {
input = time_zone_time.openConnection().getInputStream();
final BufferedReader reader = new BufferedReader(new InputStreamReader(input));
final StringBuilder sBuf = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sBuf.append(line);
}
} catch (IOException e) {
Log.e(e.getMessage(), "XML parser, stream2string 1");
} finally {
try {
input.close();
} catch (IOException e) {
Log.e(e.getMessage(), "XML parser, stream2string 2");
}
}
String xmltext = sBuf.toString();
int startpos = xmltext.indexOf("<geonames");
xmltext = xmltext.substring(startpos);
XmlPullParser parser;
try {
parser = XmlPullParserFactory.newInstance().newPullParser();
parser.setInput(new StringReader (xmltext));
int eventType = parser.getEventType();
String tagName = "";
while(eventType != XmlPullParser.END_DOCUMENT) {
switch(eventType) {
case XmlPullParser.START_TAG:
tagName = parser.getName();
break;
case XmlPullParser.TEXT :
if (tagName.equalsIgnoreCase("time"))
erg = parser.getText();
break;
}
try {
eventType = parser.next();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (XmlPullParserException e) {
e.printStackTrace();
erg += e.toString();
}
} catch (IOException e1) {
e1.printStackTrace();
}
} catch (MalformedURLException e1) {
e1.printStackTrace();
}
return erg;
}
并将其用于:
GeoPoint gp = new GeoPoint(39.6034810,-119.6822510);
String Current_TimeZone_Time = get_time_zone_time_geonames(gp);
其他回答
如果你不想使用web服务，你可以像这样从浏览器中检索信息:
var d = new Date();
var usertime = d.toLocaleString();
//some browsers / OSs provide the timezone name in their local string
var tzsregex = /\b(ACDT|ACST|ACT|ADT|AEDT|AEST|AFT|AKDT|AKST|AMST|AMT|ART|AST|AWDT|AWST|AZOST|AZT|BDT|BIOT|BIT|BOT|BRT|BST|BTT|CAT|CCT|CDT|CEDT|CEST|CET|CHADT|CHAST|CIST|CKT|CLST|CLT|COST|COT|CST|CT|CVT|CXT|CHST|DFT|EAST|EAT|ECT|EDT|EEDT|EEST|EET|EST|FJT|FKST|FKT|GALT|GET|GFT|GILT|GIT|GMT|GST|GYT|HADT|HAEC|HAST|HKT|HMT|HST|ICT|IDT|IRKT|IRST|IST|JST|KRAT|KST|LHST|LINT|MART|MAGT|MDT|MET|MEST|MIT|MSD|MSK|MST|MUT|MYT|NDT|NFT|NPT|NST|NT|NZDT|NZST|OMST|PDT|PETT|PHOT|PKT|PST|RET|SAMT|SAST|SBT|SCT|SGT|SLT|SST|TAHT|THA|UYST|UYT|VET|VLAT|WAT|WEDT|WEST|WET|WST|YAKT|YEKT)\b/gi;
//in other browsers the timezone needs to be estimated based on the offset
var timezonenames = {"UTC+0":"GMT","UTC+1":"CET","UTC+2":"EET","UTC+3":"EEDT","UTC+3.5":"IRST","UTC+4":"MSD","UTC+4.5":"AFT","UTC+5":"PKT","UTC+5.5":"IST","UTC+6":"BST","UTC+6.5":"MST","UTC+7":"THA","UTC+8":"AWST","UTC+9":"AWDT","UTC+9.5":"ACST","UTC+10":"AEST","UTC+10.5":"ACDT","UTC+11":"AEDT","UTC+11.5":"NFT","UTC+12":"NZST","UTC-1":"AZOST","UTC-2":"GST","UTC-3":"BRT","UTC-3.5":"NST","UTC-4":"CLT","UTC-4.5":"VET","UTC-5":"EST","UTC-6":"CST","UTC-7":"MST","UTC-8":"PST","UTC-9":"AKST","UTC-9.5":"MIT","UTC-10":"HST","UTC-11":"SST","UTC-12":"BIT"};
var timezone = usertime.match(tzsregex);
if (timezone) {
timezone = timezone[timezone.length-1];
} else {
var offset = -1*d.getTimezoneOffset()/60;
offset = "UTC" + (offset >= 0 ? "+" + offset : offset);
timezone = timezonenames[offset];
}
//there are 3 variables can use to see the timezone
// usertime - full date
// offset - UTC offset time
// timezone - country
console.log('Full Date: ' + usertime);
console.log('UTC Offset: ' + offset);
console.log('Country Code Timezone: ' + timezone);
在我目前的情况下，它是打印:
日期:“27”/“01”/“2014”:“16”:“53”:“37” UTC偏移量:UTC-3 国家代码时区:BRT
希望对大家有所帮助。
如果您想使用geonames.org，请使用这段代码。(但是geonames.org有时很慢)
String get_time_zone_time_geonames(GeoPoint gp){
String erg = "";
double Longitude = gp.getLongitudeE6()/1E6;
double Latitude = gp.getLatitudeE6()/1E6;
String request = "http://ws.geonames.org/timezone?lat="+Latitude+"&lng="+ Longitude+ "&style=full";
URL time_zone_time = null;
InputStream input;
// final StringBuilder sBuf = new StringBuilder();
try {
time_zone_time = new URL(request);
try {
input = time_zone_time.openConnection().getInputStream();
final BufferedReader reader = new BufferedReader(new InputStreamReader(input));
final StringBuilder sBuf = new StringBuilder();
String line = null;
try {
while ((line = reader.readLine()) != null) {
sBuf.append(line);
}
} catch (IOException e) {
Log.e(e.getMessage(), "XML parser, stream2string 1");
} finally {
try {
input.close();
} catch (IOException e) {
Log.e(e.getMessage(), "XML parser, stream2string 2");
}
}
String xmltext = sBuf.toString();
int startpos = xmltext.indexOf("<geonames");
xmltext = xmltext.substring(startpos);
XmlPullParser parser;
try {
parser = XmlPullParserFactory.newInstance().newPullParser();
parser.setInput(new StringReader (xmltext));
int eventType = parser.getEventType();
String tagName = "";
while(eventType != XmlPullParser.END_DOCUMENT) {
switch(eventType) {
case XmlPullParser.START_TAG:
tagName = parser.getName();
break;
case XmlPullParser.TEXT :
if (tagName.equalsIgnoreCase("time"))
erg = parser.getText();
break;
}
try {
eventType = parser.next();
} catch (IOException e) {
e.printStackTrace();
}
}
} catch (XmlPullParserException e) {
e.printStackTrace();
erg += e.toString();
}
} catch (IOException e1) {
e1.printStackTrace();
}
} catch (MalformedURLException e1) {
e1.printStackTrace();
}
return erg;
}
并将其用于:
GeoPoint gp = new GeoPoint(39.6034810,-119.6822510);
String Current_TimeZone_Time = get_time_zone_time_geonames(gp);
node.js的这个解决方案怎么样 https://github.com/mattbornski/tzwhere
和它的Python对等体: https://github.com/pegler/pytzwhere
我们在Teleport刚刚开始开放我们的API，其中一个用例也是为坐标公开TZ信息。
例如，可以通过以下方式请求我们所有可用的TZ信息的坐标:
curl -s https://api.teleport.org/api/locations/59.4372,24.7453/?embed=location:nearest-cities/location:nearest-city/city:timezone/tz:offsets-now | jq '._embedded."location:nearest-cities"[0]._embedded."location:nearest-city"._embedded."city:timezone"'
这将返回以下内容
{
"_embedded": {
"tz:offsets-now": {
"_links": {
"self": {
"href": "https://api.teleport.org/api/timezones/iana:Europe%2FTallinn/offsets/?date=2015-09-07T11%3A20%3A09Z"
}
},
"base_offset_min": 120,
"dst_offset_min": 60,
"end_time": "2015-10-25T01:00:00Z",
"short_name": "EEST",
"total_offset_min": 180,
"transition_time": "2015-03-29T01:00:00Z"
}
},
"_links": {
"self": {
"href": "https://api.teleport.org/api/timezones/iana:Europe%2FTallinn/"
},
"tz:offsets": {
"href": "https://api.teleport.org/api/timezones/iana:Europe%2FTallinn/offsets/{?date}",
"templated": true
},
"tz:offsets-now": {
"href": "https://api.teleport.org/api/timezones/iana:Europe%2FTallinn/offsets/?date=2015-09-07T11%3A20%3A09Z"
}
},
"iana_name": "Europe/Tallinn"
}
在本例中，我使用./jq进行JSON解析。
我写了一个包https://github.com/ringsaturn/tzf支持获取时区在Go&Python和非常快:
package main
import (
"fmt"
"github.com/ringsaturn/tzf"
)
func main() {
finder, err := tzf.NewDefaultFinder()
if err != nil {
panic(err)
}
fmt.Println(finder.GetTimezoneName(116.6386, 40.0786))
}
Python https://github.com/ringsaturn/tzfpy sample:
from tzfpy import get_tz
print(get_tz(121.4737, 31.2305))
Rust https://github.com/ringsaturn/tzf-rs样品:
use tzf_rs::DefaultFinder;
fn main() {
let finder = DefaultFinder::new();
print!("{:?}\n", DefaultFinder.get_tz_name(116.3883, 39.9289));
}
推荐文章
- UNIX时间戳会跨时区改变吗?
- 在PostgreSQL中使用UTC当前时间作为默认值
- 格式化特定时区的日期
- navigator。gelocation。getcurrentposition有时有效有时无效
- 如何保存时区解析日期/时间字符串与strptime()?
- 如何在node.js中设置默认时区?
- 从他们的IP获取国家访客
- 如何设置java.util.Date的时区?
- 如何获取MySQL的当前时区?
- 如何仅使用标准库将UTC日期时间转换为本地日期时间?
- PostgreSQL中带/不带时区的时间戳之间的差异
- 在c#中使用FindTimeZoneById()的时区id列表?
- date():依赖系统的时区设置是不安全的…
- 位置坐标、纬度和经度的长度是多少?
- 在SQL数据库中存储纬度和经度数据时使用什么数据类型?
