Coastlines resolutions

[haze1986]

I am very new to LAS and struggling to setup something new. I have a netcdf data of a very localised region that I wish to publish. The details of coastlines are lacking and I would like to have this improved. I have read the FAQ and a few journal files but have no idea how to proceed at all. My work flow is preparing the NC file -> run addXML -> transfer the file to tomcat. From here I have no idea which xml files I have to edit. I suspect it should be here:

c light_centered

https://ferret.pmel.noaa.gov/Ferret/faq/detailed-coastlines-and-borders

Custom jnls seems to not work for me too. I have tried placing the custom journal files but have no idea how to proceed.

A clearer walkthrough on how to improve the coastlines resultions would be much appreciated.