Strange lines when zoomed in

[Doyon, Jean-Francois]

Hummm, well when I read the Shapefile Technical Description, it is clearly
stated that one
shapefile holds ONE type of shape, and Shape number 3 is "PolyLine", and I
have shapefiles
that are made up of such shapes.

This is how I came about the problem, since my shapefile was holding shapes
of type 3, I set
the TYPE to POLYLINE, but had problems until I set it back to LINE.

Works either way, but it just seems somewhat ... wrong ? :)

J.F.

> ----------
> From: 	Stephen Lime[SMTP:steve.lime at dnr.state.mn.us]
> Sent: 	Wednesday, October 25, 2000 12:20 PM
> To: 	Jean-Francois.Doyon at CCRS.NRCan.gc.ca; 'RAldridge';
> mapserver-users at lists.gis.umn.edu
> Subject: 	RE: Strange lines when zoomed in
> 
> The *only* way to get that artifact is by drawing line shapefiles as
> polygon/polyline layers.
> There are no polyline shapefiles.
> 
> Steve
> 
> Stephen Lime
> Internet Applications Analyst
> 
> Minnesota DNR
> 500 Lafayette Road
> St. Paul, MN 55155
> 651-297-2937
> 
> >>> "Doyon, Jean-Francois" <Jean-Francois.Doyon at CCRS.NRCan.gc.ca> 10/25/00
> 10:38AM >>>
> Yup, I've seen that just change the type from POLYLINE to LINE and that
> problem will go away.
> 
> I'm not sure the logic behind that though, since I had the same problem
> with
> rivers doing that, even though
> they ARE polylines, I have to set them as LINES to avoid it.
> 
> J.F.
> 
> > ----------
> > From: 	RAldridge[SMTP:RAldridge at linuxstart.com] 
> > Sent: 	Wednesday, October 25, 2000 9:43 AM
> > To: 	mapserver-users at lists.gis.umn.edu 
> > Subject: 	Strange lines when zoomed in
> > 
> > I was wondering if anyone else had this problem, or, better yet, had
> > solved this problem.  I have a couple of small shapefiles (roads.shp &
> > contours.shp) that aren't drawing properly when zoomed in tight.  The
> > contours.shp contains ~1500 polylines and the roads.shp contains 8
> > polylines (coverage area is a single section).  Both shapefiles look
> good
> > when zoomed out (e.g. 1:24000), but when I zoom in (to e.g. 1:5000), I
> get
> > stray, straight lines shooting off of endpoints.  The stray lines appear
> > to be random in their direction, but always seem to be beginning at
> > existing endpoints.
> > 
> > Any ideas?
> > 
> > Thanks,
> > 
> > Robert Aldridge
> > ----------------------
> > Do you do Linux? :) 
> > Get your FREE @linuxstart.com email address at:
> http://www.linuxstart.com 
> > 
>