Phil, sorry for the confusion about the location. Opencpn tide harmonics are in fact located at /
usr/local/share/opencpn/tcdata.
When I said opencpn uses the same data as xtide. It's not the same file, but the names and numbers in those files.
...and this isn't 100% correct either. They are divergent data sets with additions, deletions, modifications. It is much like English (or any other language). British english, American english, Australian english are different and yet the same.
Go to
/usr/local/share/opencpn/tcdata and look at the files with a regular text editor (gedit or leafpad). It's a strange combination of fascinatingly interesting and frightfully dull.
/usr/local/share/opencpn/tcdata/harmonic.idx:
Code:
# Note: This file is automatically generated by Tide2idx version 2.1 (2002-02-06)
# and distributed as part of the free WXTide32 program located at http://WXTide32.com
# Please do not modify this file unless you know EXACTLY what you're doing!
Opencpn gets its data set from WXTide32. WXTide gets its dataset from XTide.
You can also see the changes that have been made to the data over time.
I don't have a copy of OpenCPN Windows version, but Navigatrix does have the Windows version of WXTide32 (
/home/$USER/.wine/drive_c/Program Files/WXTide32)
....it's the same stuff (but maybe with an accent.)
Is there some problem that you are having...or are you just curious?
I stuck on a sample for those who are curious, but not so curious to open a file.
Code:
# 2000-07-26 (dave)
# Changed all Nunavut sites to time zone :America/Iqaluit.
# (Sites marked Nunavut/NWT were not changed.)
# Changed name of 'Frobisher' to 'Iqaluit.'
#
# 2000-06-23 (dave)
# Deleted one of the White Rock, British Columbia sets which was
# clearly bogus, and reported as such by Baden Kudrenecky.
#
# 2000-06-20 (dave)
# As of 1999, Sonora quit observing Daylight Savings Time. This
# forced the maintainers of the zoneinfo database to split off a new
# time zone just for Sonora: :America/Hermosillo. This change has
# not yet propagated to the average Linux distribution. As a
# temporary workaround, I have changed the time zones of the four
# Sonora locations to MST7. This makes predictions correct right
# now but breaks predictions for years before 2000. When the
# zoneinfo change has propagated to Slackware, I will update the
# time zones in harmonics.world and add the new time zone to the
# backwards compatability table in the XTide source code.
#
# 2000-06-18 (dave)
# Changed "Guayamas" back to "Guaymas." I don't know what gave
# me the idea it was spelt "Guayamas."
#
# 2000-05-07 (dave)
# Downgraded 13 pedigrees that were missed by the pedigree-
# guessing heuristic. There remain a good many -1B and -1.5B
# pedigrees on data sets that lack explicit commentary; what
# to do with these?
#
# Corrected typo "Temminal Island."
