Details Ticket 1136


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Serial Number 1136
Subject detailed view of vector maps doesn't work
Area grass6
Queue grass
Requestors charris@aecgi.com
Owner none
Status open
Last User Contact Sun Dec 3 21:40:29 2006 (2 yr ago)
Current Priority 30
Final Priority 70
Due No date assigned
Last Action Tue Jun 19 09:03:40 2007 (1 yr ago)
Created Wed Jun 26 22:35:11 2002 (6 yr ago)

Transaction History Ticket 1136


Wed, Jun 26 2002 22:35:11    Request created by guest  
Subject: detailed view of vector maps doesn't work

Platform: GNU/Linux/i386
grass obtained from: Other (CDROM etc)
grass binary for platform: Compiled from Sources
GRASS Version: GRASS 5.0.0pre5 (June 2002)

Can't zoom in on vector maps.

d.zoom or manually adjusting with g.region both show nothing at
all if I try to look at details of vector map. If done with d.zoom,
I can Unzoom until I find home base again, and then if I zoom in
on an area that encloses entire orignal region, it works.

I could do this with the pre3 release, except then if I read in
a shape file I had extraneous lines going all over the place.

I'm willing to look into fixing some myself, if somebody can clue
me in a little where to look. Everything looks reasonable up to
the call to redraw() in  src/display/d.zoom/cmd/set.c, I don't
know if I'd be able to figure out that much below there.

compilation -- nothing special. ./congiure, make, make install
(no postgres or fftw)

I can send the data I'm looking at if you want it.
Wed, Jun 26 2002 22:43:47    Mail sent by guest  
damnit

never mind

v.spag then v.support seem to fix this.

Tue, Jul 16 2002 22:01:08    Priority changed to 30 by bernhard  
Fri, Dec 1 2006 07:41:58    Comments added by hbowman  
I see this if I zoom waaaaaaaay in on e.g. a corner in a vector area, often it
becomes very slow to redraw and only one of the two borders are drawn. The
filled area is correctly displayed.


Hamish
Sun, Dec 3 2006 21:40:29    Mail sent by mneteler  
If one zooms very much, the vectors start to jump around (like in QGIS, too).
This is apparently a precision problem in the display system. A common trick
to work around this is to limit the zoom depth.

Markus
Tue, Jun 19 2007 09:03:40    Area changed to grass6 by hbowman  
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