Source value 'c'

[fitzyjoe]

I was extracting information from gshhg v2.3.7 and ran across 4 distinct values for source:

source code with count

W: 179825
C: 8058
A: 673
c: 56

Commands I used to obtain those numbers:

gmt gshhg gshhs_f.b | grep '>' | tr -s ' ' | cut -d ' ' -f5 | grep W  | wc
gmt gshhg gshhs_f.b | grep '>' | tr -s ' ' | cut -d ' ' -f5 | grep C  | wc
gmt gshhg gshhs_f.b | grep '>' | tr -s ' ' | cut -d ' ' -f5 | grep A  | wc
gmt gshhg gshhs_f.b | grep '>' | tr -s ' ' | cut -d ' ' -f5 | grep c  | wc

I found docs on this page: https://docs.generic-mapping-tools.org/latest/supplements/gshhg/gshhg.html

It says, "Source is either W (World Vector Shoreline) or C (CIA World Data Bank II)"

I found this page: https://www.soest.hawaii.edu/pwessel/gshhg/

It lists the sources as:

World Vector Shorelines (WVS). CIA World Data Bank II (WDBII). Atlas of the Cryosphere (AC).

So, I'm guessing that A means "Atlas of the Cryosphere". Anyone know what lowercase 'c' means? Is it the same as uppercase 'C'?

[PaulWessel]

I see the gshhg man page needs some updating to mention A - thanks. As for lower case c, the GMT gshhg man page says

Source is either W (World Vector Shoreline) or C (CIA World Data Bank II); lower case is used if a lake is a river-lake

so those are areas of rivers that are too wide to be a "line".

[PaulWessel]

I have improved the gshhg GMT man page to include mention of the Atlas and A.