This text was supplied by Michel Verheughe email@example.com
"Unofficial" texts are member contributions that have not yet been discussed or approved by the ESP community.
Starting on a scenery that includes a coastline requires that this one is traced by moving the polygons according to its shape, and in a better way than what is on the default scenery files (ENV files).To do this, Austin Meyer had on his ftp://ftp.x-plane.com a foldercalled "coastlines" that contained all the world coastlines as the USGS
World Data Bank II files. Once downloaded and placed in a folder called"coastlines" inside the "additional nav data" folder, they show a succession of white points in WorldMaker. These are the coastline to follow. It also shows lakes or other water bodies, but not rivers. These files were on the ftp.x-plane but they are not longer there at the moment of this writing. Write to me (firstname.lastname@example.org) and i will send you the file(s) you need for your area. Note that these files are not very accurate. In places, there is several hundred meters of error. (e.g. Copenhagen Kastrup airport is in the water, following these data).
Another set of USGS coastline data is called the World Vector Shoreline. These data are much more accurate, in fact to GPS accuracy. The drawback is that they don't show lakes.
You can download the USGS World Vector Shoreline data direct from the Internet but you will have to convert it to XP format. I wrote a program that does that but it is only for the Mac. If you want to make an accurate coastline, write to me (email@example.com) and I will send you my program (if you have a Mac) or I will convert the files for you.
Note that, because it is much more accurate, the World Vector Shoreline files are much larger. Since X-Plane limits to only 3000 points per file, and a file covers 10 by 10 degrees of latitude/longitude, you have to rename these in order to work by small areas of 3000 points.
This sounds a bit complicated but if you have a complex coastline, it is worth the effort doing it.