从地理位置机芯字符串中提取纬度/经度

Question

I have a Geo location string as 25°9'37"N 55°13'28"E . Using JavaScript Regex I want to extract the Lat and Lng from the above string. Thanks.

Answer 1

Your first row could be "25°9'37"N is the minute-format of a latitude, you probably want to extract it's values and convert to it's decimal degree representation, this enables further calculation on it. @Stormwind

According to this blogpost, conversion formula is

//latitude formula
([LATITUDE_DEG])+([LATITUDE_MIN]/60)+([LATITUDE_SEC]/3600))*
IF [Latitude_Direction]="South" THEN -1 ELSE 1 END

//longitude
([LONGITUDE_DEG]+([LONGITUDE_MIN]/60)+([LONGITUDE_SEC]/3600))*
IF [Longitude_Direction]="West" THEN -1 ELSE 1 END

Regex (simple)

//latitude
25°9'37"N
/(\w+)°(\w+)'(\w+)"(\w+)/
`25`, `9`, `37`, `N`

//regex from @PranavCBalan also works well
/(\d+)°(\d+)'(\d)+"([NEWS])/
`25`, `9`, `37`, `N`

Solution for latitude (simple) - notice, this solution is error prone, as it was written within 5mins, so be careful

var lat_str = "25°9'37\"N"; //escaped string
lat_str = lat_str.replace('\"', '"'); //little trick
var matches = lat_str.match(/(\w+)°(\w+)'(\w+)"(\w+)/); //regexify
var lat_deg = parseInt(matches[1]); //degrees
var lat_min = parseInt(matches[2]); //minutes
var lat_sec = parseInt(matches[3]); //seconds
var lat_dir = matches[4];           //direction

var latitude = (lat_deg+(lat_min/60)+(lat_sec/3600))*(lat_dir === 'N' ? 1 : -1);

//25.160277777777775

Solution for longitude

//same as latitude (except direction check), do it as your homework

For more details refer to Converting Latitude/Longitude from Degrees/Minutes/Seconds to Decimal Degrees