CImage:KwdGetDmsEx

CImage:KwdGetDmsEx

The KwdGetDmsEx method returns a DMS (Degrees, Minutes, and Seconds) string for a keyword in the image header. Also returned is a status flag which indicates whether the keyword was present. Use this method to read a keyword not in the standard angle format which uses : as the field delimiter. To return a keyword value specified in hours, minutes, and seconds, use KwdGetHmsEx The related KwdGetDMS method returns the DMS value without a status flag.

Syntax

sDMSValue, bSuccess = CImage:KwdGetDmsEx( sKwd )

sKwd is the keyword name.

sDMSValue is the returned value of the keywordsKwd .

On success, bSuccess is true.

On failure, bSuccess is false and sDMSValue is nil.

Remarks

This method returns a properly formatted angle string after reading a keyword value containing degrees, minutes, and seconds ("DMS"). The DMS string may contain the following field delimiters:

space, comma, colon, hyphen, slash, D, d, M, m, S, s, °, ', "

A preceding minus sign (or hyphen) is handled properly but embedded hyphens are treated as delimiters. The result is formatted into a standard angle string of the form +ddd:mm:ss.sss. The sign is returned only if the angle is negative.

If the specified keyword does not exist, then 0:00:00.000 is returned. To test whether the keyword exists, call KwdExists before this method.

Example

Suppose a CImage named I exists and contains the keyword "SITELONG" which has a value in the format '-14 24 16.4'. The following script returns the value formatted as "-14:24:16.4":

sLong, bFound = I:KwdGetDmsEx("SITELONG")	-- read the keyword value
if bFound then
Printf( "Site Longitude= '%s'", sLong )	-- prints Local Hour Angle = -14:24:16.400
else
Printf( "Site Longitude not found" )	-- SITELONG was not found
end