Rgshhs shift=true question
On Wed, 18 Feb 2009, Hans-J?rg Bibiko wrote:
Hi, I'm using the river database 'wdb_rivers_l.b' downloaded from ftp://ftp.soest.hawaii.edu/pwessel/gshhs/gshhs_1.11.zip. If I do this:
rivers_low <- Rgshhs("wdb_rivers_l.b")
I get a list of rivers as SpatialLines with
bbox(rivers_low[[1]])
min max r1 0.000278 359.99944 r2 -52.733333 74.41167 Fine. But I need a xlim range of c(-180, 180). I could do it manually but I read in ?Rgshhs that there's an argument 'shift' which, set to TRUE, shifts longitudes > 180 degrees to below zero. But if I call:
rivers_low <- Rgshhs("wdb_rivers_l.b", shift = TRUE)
I get the same bbox. What am I doing wrong?
Nothing wrong, it was a bug. Support for the two lines databases was added only in draft form, and that argument wasn't respected. From 0.7-20, it is respected. Roger
Thanks in advance and kind regards, --Hans
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Roger Bivand Economic Geography Section, Department of Economics, Norwegian School of Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no