+5Hi,
I have many LAS tiles with gps_time component. Gps time values are in standard GPS Time : ex 363439432.1942503
I would like to display the minimum and maximum times in DD/MM/YYYY HH:MM:SS format. I can use the PointCloudStatisticsCalculator to get the minimum and maximum values, but I can't work out how to convert 363439432.1942503 to the required format.
Any idea?
Thanks u !
Best answer by nielsgerrits
No standard transformer to do this but GPS time is seconds since 00:00:00 UTC on 6 january 1980 without leap seconds. You can calculate this using an AttributeCreator:
@DateTimeFormat(
@DateTimeAdd(
@DateTimeParse("1980-01-06T00:00:00Z","%Y-%m-%dT%H:%M:%SZ"),
P0Y0M0DT0H0M@Value(gps_time)S
),
"%d/%m/%Y %H:%M:%S"
)
If gps_time = 363439432.1942503 then datetime is 13/07/1991 11:23:52.194250286.
@DateTimeAdd needs the ISO 8601 duration format, also see the documentation:
Be aware: It looks like the function for adding datetime is changed between 2025.2 and 2026.1 so you might have to change the solution depending on your version. It used to be @DateTimeAdd() but is @AddDateTime() according to the newer documentation.
+62Do you happen to know the version of the LAS file? There’s been different time formats used across different versions (but of course… 😐)
+5Do you happen to know the version of the LAS file? There’s been different time formats used across different versions (but of course… 😐)
+65No standard transformer to do this but GPS time is seconds since 00:00:00 UTC on 6 january 1980 without leap seconds. You can calculate this using an AttributeCreator:
@DateTimeFormat(
@DateTimeAdd(
@DateTimeParse("1980-01-06T00:00:00Z","%Y-%m-%dT%H:%M:%SZ"),
P0Y0M0DT0H0M@Value(gps_time)S
),
"%d/%m/%Y %H:%M:%S"
)
If gps_time = 363439432.1942503 then datetime is 13/07/1991 11:23:52.194250286.
@DateTimeAdd needs the ISO 8601 duration format, also see the documentation:
Be aware: It looks like the function for adding datetime is changed between 2025.2 and 2026.1 so you might have to change the solution depending on your version. It used to be @DateTimeAdd() but is @AddDateTime() according to the newer documentation.
