Hi all,
is there a particular reason why vector area attributes can only be
displayed if centroids are also displayed? Often I have to set symbol
size to zero to get a reasonably clean display, centroids would only
clutter the display and most of the time I am not interested in the
exact location of centroids when displaying areas.
Any objections if I add this functionality to d.vect: display area
attributes also if centroids are not displayed?
Markus M
Markus Metz wrote:
is there a particular reason why vector area attributes can
only be displayed if centroids are also displayed? Often I have
to set symbol size to zero to get a reasonably clean display,
centroids would only clutter the display and most of the time I
am not interested in the exact location of centroids when
displaying areas.Any objections if I add this functionality to d.vect:
display area attributes also if centroids are not displayed?
do you mean the centroid "+" (or other symbol) must be displayed
to also get the display=attribute for an area? if so that sounds
line a recent regression.
if you leave it as display=shape,attribute of course you will
get the shape (ie symbol) as well.
as you must well know, but for the sake of the discussion, areas
are virtual features fundamentally tied to centroids.
"best placed labels" was the motivation for v.label.sa (one day
to be merged into v.label as a flag)
??,
Hamish
On 09/08/11 08:11, Markus Metz wrote:
Hi all,
is there a particular reason why vector area attributes can only be
displayed if centroids are also displayed? Often I have to set symbol
size to zero to get a reasonably clean display, centroids would only
clutter the display and most of the time I am not interested in the
exact location of centroids when displaying areas.Any objections if I add this functionality to d.vect: display area
attributes also if centroids are not displayed?
See http://trac.osgeo.org/grass/ticket/252
Moritz
On Tue, Aug 9, 2011 at 10:17 AM, Hamish <hamish_b@yahoo.com> wrote:
Markus Metz wrote:
is there a particular reason why vector area attributes can
only be displayed if centroids are also displayed? Often I have
to set symbol size to zero to get a reasonably clean display,
centroids would only clutter the display and most of the time I
am not interested in the exact location of centroids when
displaying areas.Any objections if I add this functionality to d.vect:
display area attributes also if centroids are not displayed?do you mean the centroid "+" (or other symbol) must be displayed
to also get the display=attribute for an area? if so that sounds
line a recent regression.
d.vect behaves likes this since 6.0.2, maybe earlier.
if you leave it as display=shape,attribute of course you will
get the shape (ie symbol) as well.
What I mean is that
d.vect display=shape,attr type=area
does not display area attributes whereas
d.vect display=shape,attr type=area,centroid
does, but I usually don't want to display centroids when I want to
display area attributes.
as you must well know, but for the sake of the discussion, areas
are virtual features fundamentally tied to centroids.
Hm, for the sake of the discussion, areas are not fundamentally, but
optionally tied to centroids. Centroids in turn are fundamentally tied
to areas. IOW, areas without centroids are perfectly legal whereas
centroids outside any area or duplicate centroids violate topology.
Markus M
On Tue, Aug 9, 2011 at 11:47 AM, Moritz Lennert
<mlennert@club.worldonline.be> wrote:
On 09/08/11 08:11, Markus Metz wrote:
Hi all,
is there a particular reason why vector area attributes can only be
displayed if centroids are also displayed? Often I have to set symbol
size to zero to get a reasonably clean display, centroids would only
clutter the display and most of the time I am not interested in the
exact location of centroids when displaying areas.Any objections if I add this functionality to d.vect: display area
attributes also if centroids are not displayed?
Very much what I did. I'm going to apply your patch in trunk.
Markus M
On Tue, Aug 9, 2011 at 11:50 AM, Markus Metz
<markus.metz.giswork@googlemail.com> wrote:
On Tue, Aug 9, 2011 at 11:47 AM, Moritz Lennert
<mlennert@club.worldonline.be> wrote:On 09/08/11 08:11, Markus Metz wrote:
Hi all,
is there a particular reason why vector area attributes can only be
displayed if centroids are also displayed? Often I have to set symbol
size to zero to get a reasonably clean display, centroids would only
clutter the display and most of the time I am not interested in the
exact location of centroids when displaying areas.Any objections if I add this functionality to d.vect: display area
attributes also if centroids are not displayed?Very much what I did. I'm going to apply your patch in trunk.
Oops, already solved in trunk, although differently.
Markus M