TIOParams.EXIF_GPSAltitudeRef

Declaration

property EXIF_GPSAltitudeRef: AnsiString;

Description

Returns the altitude used as a reference:
◼If the reference is sea level and the altitude is above sea level, "0" is returned.
◼If the altitude is below sea level, a value of "1" is returned and the altitude is indicated as an absolute value in the EXIF_GPSAltitude tag.

The reference unit is meters.

Default value is empty string, which means "unknown". An unknown value is not written when saving EXIF values.

Note: To save GPS data, you must set EXIF_GPSVersionID to '2.2.0.0' (or use the const, GPS_Version_ID)

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