2

我有多行需要用查询转换的度分秒。

36°19'11.46" N = 36.31985

95°36'02.22" 宽​​ = 95.600617

每一行都会有所不同。我已经坚持了两天了。这甚至可能吗？

4

5 回答 5

2

Nice lifehack：使用 SEC_TO_TIME 内置 MySQL 函数的反向问题解决方案（程度为 DMS）：

CREATE FUNCTION `geocoords`(lon double, lat double) RETURNS varchar(24) CHARSET cp1251
    NO SQL
    DETERMINISTIC
begin    
  declare alon double;
  declare alat double;
  declare slon varchar(12);
  declare slat varchar(12);
  set alon = abs(lon);
  set alat = abs(lat);
  set slon = TIME_FORMAT(SEC_TO_TIME(alon*3600), '%H°%i''%s"');
  set slat = TIME_FORMAT(SEC_TO_TIME(alat*3600), '%H°%i''%s"');
  if lon>0 then
    set slon = concat(slon, 'E');
  elseif lon<0 then  
    set slon = concat(slon, 'W');
  end if;  
  if lat>0 then
    set slat = concat(slat, 'N');
  elseif lat<0 then  
    set slat = concat(slat, 'S');
  end if;  
  return concat(slat, ' ', slon);
end

选择地理坐标（30.550157546997、50.344024658203）

50°20'38"N 30°33'01"E

于 2015-09-05T13:45:40.377 回答
1

以下应该有效：

SELECT D + M/60 + S/3600;

例如，在 MySQL 中：

SELECT 36 + 19/60 + 11.46/3600;

返回：36.319850

于 2015-01-09T20:03:44.227 回答
0

这会将 21°48'6.384" 形式的字符串转换为十进制

CREATE FUNCTION database.DMS_TO_DECIMAL(dms varchar(20))
RETURNS decimal(12,9)
BEGIN
    DECLARE deg decimal(12,9);
    DECLARE mins decimal(12,9);
    DECLARE secs decimal(12,9);

    SET deg = CAST(  SUBSTRING_INDEX(dms, '°', 1) AS decimal(12,9));
    SET mins = CAST( (SUBSTR(dms, POSITION('°' IN dms) + 1, POSITION("'" IN dms) -  POSITION('°' IN dms) - 1)) AS decimal(12,9));
    SET secs = CAST( (SUBSTR(dms, POSITION("'" IN dms) + 1, POSITION("\"" IN dms) -  POSITION("'" IN dms) - 1)) AS decimal(12,9));

    RETURN deg + mins/60 + secs/3600;
END
于 2021-05-08T00:54:23.257 回答
0

添加方向（W/S）：

DROP FUNCTION IF EXISTS `DmsToDecimal`;
DELIMITER $$

CREATE FUNCTION `DmsToDecimal`(`dms` VARCHAR(50)) 
   RETURNS DECIMAL(12,9) 
   DETERMINISTIC 
   NO SQL 
   SQL SECURITY INVOKER 
BEGIN
    DECLARE deg decimal(12,9);
    DECLARE mins decimal(12,9);
    DECLARE secs decimal(12,9);
    DECLARE sign integer;
  
    SET dms = UPPER(TRIM(REPLACE(dms, ",", ".")));
  
    SET deg = CAST(  SUBSTRING_INDEX(dms, '°', 1) AS decimal(12,9));
    SET mins = CAST( (SUBSTR(dms, POSITION('°' IN dms) + 1, POSITION("'" IN dms) -  POSITION("°" IN dms) - 1)) AS decimal(12,9));
    SET secs = CAST( (SUBSTR(dms, POSITION("'" IN dms) + 1, POSITION("""" IN dms) -  POSITION("'" IN dms) - 1)) AS decimal(12,9));

    SET sign = 1 - 2 * (RIGHT(dms, 1) = "W" OR RIGHT(dms, 1) = "S";

    RETURN  sign * (deg + mins / 60 + secs / 3600);
END$$
DELIMITER ;
于 2021-06-30T03:56:04.867 回答
0

我最终构建了这个，它完美地满足了我的需要。你会注意到我在数字上添加了一个 C，这是为了标记它们，所以如果它已经被转换，它将不会继续转换。

UPDATE
    MasterTable
SET
    MasterTable.Latitude_A = MasterTable.Latitude,
    MasterTable.Longitude_A = MasterTable.Longitude
WHERE
    ProjectID = 'ProjectAlpha'
    and Sequence = '0'
    and MasterTable.Latitude NOT LIKE '%C%'
    and MasterTable.Longitude NOT LIKE '%C%';

TRUNCATE TABLE gpsconvert;
    INSERT into gpsconvert(gpsconvert.`Account Number`,gpsconvert.Latitude,gpsconvert.Longitude)
SELECT
        MasterTable.AccountNumber,
        MasterTable.Latitude,
        MasterTable.Longitude
FROM
    MasterTable
WHERE
    MasterTable.ProjectID = 'ProjectAlpha'
    and MasterTable.Sequence = '0'
    and MasterTable.Latitude NOT LIKE '%c%'
    and MasterTable.Longitude NOT LIKE '%c%'
    and MasterTable.Latitude <> ''
    and MasterTable.Longitude <> '';

UPDATE
    gpsconvert
SET
    gpsconvert.LatDegree = LEFT(gpsconvert.Latitude,2),
    gpsconvert.LatMinutes = SUBSTRING(gpsconvert.Latitude,-7,2),
    gpsconvert.LatSeconds = SUBSTRING(gpsconvert.latitude,-5,5),
    gpsconvert.LatDecimal = gpsconvert.LatDegree + (gpsconvert.LatMinutes/60) + (gpsconvert.LatSeconds/3600),
    gpsconvert.LongDegree = LEFT(gpsconvert.Longitude,2),
    gpsconvert.LongMinutes = SUBSTRING(gpsconvert.Longitude,-7,2),
    gpsconvert.LongSeconds = SUBSTRING(gpsconvert.Longitude,-5,5),
    gpsconvert.LongDecimal = gpsconvert.LongDegree +       (gpsconvert.LongMinutes/60) + (gpsconvert.LongSeconds/3600);

UPDATE
    MasterTable
INNER JOIN
    gpsconvert on gpsconvert.`Account Number` = MasterTable.AccountNumber
SET
    MasterTable.Latitude = CONCAT(gpsconvert.LatDecimal,'c'),
    MasterTable.Longitude = CONCAT(gpsconvert.LongDecimal,'c')
WHERE
    MasterTable.ProjectID = 'ProjectAlpha'
    and MasterTable.Sequence = '0'
    and MasterTable.AccountNumber = gpsconvert.`Account Number`
于 2015-09-08T13:59:54.797 回答