Re: Azimuthal Equidistant projection problem

Juan Diaz-Naveas <[email protected]> Mon, 26 May 2014 21:38:18 -0400
Newsgroups gmane.comp.gis.gmt.user
Message-ID <CABeNKBnQtWZJk7f0pVqyQK-p4m7JXPTR59=opVESahvaQo-dBQ@mail.gmail.com>
Dear Paul,

Thank you very much indeed. Very best wishes

Juan



On Mon, May 26, 2014 at 9:28 PM, Paul Wessel <[email protected]> wrote:

> Hi Juan-
>
> Yes, there were in fact two old bugs here, affecting both GMT 4 & 5:
>
> 1. The clip path for the entire region was hardwired to be a circle when
> -Je/E was used, regardless of -R.  In effect, it assumed -Rg.  This caused
> the blue circle.
> 2. The search that determines the min/max w/e/s/n for a region specified
> by -R...r did not check if either the S or N pole happened to be the
> antipode of the -Je/E pole [your case].  That caused a bad w/e/s/n setting
> and that gridline did not happen.
>
> Updated in both GMT 4 (r10233) and GMT 5 (r13201); please update and check
> if your other issues further down (psxy/grdimage) still need attention.  If
> so please file a bug report on the tracker.
>
> Paul
>
> On May 24, 2014, at 5:56 PM, Juan Diaz-Naveas <[email protected]>
> wrote:
>
> > Dear GMT users,
> >
> > This might be a bug, but before reporting as that I want to share the
> strange behavior of the Azimuthal Equidistant projection.
> >
> >
> > The followind command (when -R is specififed as
> -Rlonmin/lonmax/latmin/latmax) produces an output, but the -Sblue option
> draws also a strange circle:
> >
> > pscoast -B10g10 -Je-70/-90/1:15000000 -R-95/-60/-75/-55 -Di -Ggreen
> -Sblue -P -Uc -V > az_eq_scale.ps
> >
> > The next command (when -R is specified as
> -Rlonmin/latmin/lonmax/latmaxr) behaves ALMOST correctly, because the 60訖
> meridian is NOT drawn:
> >
> > pscoast -B10g10 -Je-70/-90/1:15000000 -R-95/-75/-60/-55r -Di -Ggreen
> -Sblue -P -Uc -V > az_eq_scale_r.ps
> >
> > I attach both postscript files to let you verify this.
> >
> > Actually the problem becomes bigger when you add psxy or grdimage
> commands, but for now I want to solve this very basic issue.
> >
> > Does anyone have an idea on how to solve this problem?
> >
> > Any help will be very much appreciated. Best wishes
> >
> > Juan Diaz-Naveas
> >
> > Mailing list for GMT discussions of all kinds. If you are not sure you
> have found a bug, discuss it here first. To formally report bugs or request
> features, please register and add New Issue on gmt.soest.hawaii.edu To
> unsubscribe, send the message "signoff gmt-help" to
> [email protected] Note: gmt-help will become obsolete on Sept 1,
> 2014 - please use forum on gmt.soest.hawaii.edu instead. <az_eq_scale.ps><
> az_eq_scale_r.ps>
>
> Mailing list for GMT discussions of all kinds.  If you are not sure you
> have found a bug, discuss it here first.
> To formally report bugs or request features, please register and add New
> Issue on gmt.soest.hawaii.edu
> To unsubscribe, send the message "signoff gmt-help" to
> [email protected]
> Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on
> gmt.soest.hawaii.edu instead.
>

Mailing list for GMT discussions of all kinds.  If you are not sure you have found a bug, discuss it here first.
To formally report bugs or request features, please register and add New Issue on gmt.soest.hawaii.edu
To unsubscribe, send the message "signoff gmt-help" to [email protected]
Note: gmt-help will become obsolete on Sept 1, 2014 - please use forum on gmt.soest.hawaii.edu instead.