Re: [Qgis-user] Country coastal borders

Hi, This is essentially a legal question based on the Law of the Sea Convention (UNCLOS), article 5 (baselines). Except where otherwise provided, you consider the low-water line as the determining factor as marked on large-scale charts recognised by the coastal state. There are other criteria for

Re: [Qgis-user] Country coastal borders

This is complicated and jurisdiction dependent. https://en.wikipedia.org/wiki/Territorial_waters In the US there is also the Submerged Lands Act. So you first really have to understand enough to ask a precise question. signature.asc Description: PGP signature

Re: [Qgis-user] Country coastal borders

Hi Pat and others, checked in an old textbook of my years of study: The *Mean High Water* (MHW) line forms the actual beach line or bank line. /[source: Wilhelmy, H. (1981): Geomorphologie in Stichworten. III Exogene Morphodynamik. Kiel, Germany. p. 103]/ regards, Christine chris hermansen w

Re: [Qgis-user] Country coastal borders

Pat and list, On Wed, May 5, 2021 at 8:10 AM Pat Brown wrote: > Hi > What constitutes a coastline? Is it the high water mark, the low water > mark, something intermediate, the claimed territorial waters or something > else? I would also guess that this would differ depending on whether > pol

Re: [Qgis-user] Country coastal borders

OpenStreetMap's definition is here: https://wiki.openstreetmap.org/wiki/Coastline The natural=coastline tag is used to mark mean high water springs > (also known as > Mean High Water Level / MHWL) which is the point of highest tide. Dona

[Qgis-user] Country coastal borders

Hi What constitutes a coastline? Is it the high water mark, the low water mark, something intermediate, the claimed territorial waters or something else? I would also guess that this would differ depending on whether political or geographical. Thanks, Paddy ___