On Wed, 18 Feb 2009, Hans-Jörg 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: [email protected]
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