points disappearing on zoom

[anthony farrant]

Could this problem be due to the fact that I am using a polar projection?
I have noticed that several OS desktop GIS have proven to have difficulties
with these projections. DO you think that this could affect Mapserver's
reprojection of the points on zoom?


On 5/3/07, anthony farrant <anthony.k.farrant at gmail.com> wrote:
> No the layer state is good since it shows some of the points.
>
> To be precise I'm mapping Antarctica. When I zoom on Antarctica, the
> region directly on the coast of Antarctica is devoid of points (which
> should be there, since they were there on the first drawing) while on
> the periphery there are still points. So it's shows the layer "on the
> periphery of the zoom but not in the middle." When I pan or zoom
> closer on a specific region the points reappear. So basically it's a
> one unique level of zooming that part of the points disappear...
>
> Does this make any sense? It's quite frustrating.
>
>
>
> On 5/3/07, Steve Lime <Steve.Lime at dnr.state.mn.us> wrote:
> > The precision shouldn't matter, I mean it shows up once right? Also, "tend to disappear" implies it sort of works but I would expect all or nothing. Perhaps you can clarify.
> >
> > Any chance the layer state (on/off/default) isn't being maintained between zooms?
> >
> > Steve
> >
> > >>> anthony farrant <anthony.k.farrant at GMAIL.COM> 05/03/07 8:58 AM >>>
> > Hello Mapserver users,
> >
> > I have a problem. I'm creating shapefiles dynamically and using them
> > with mapscript. Not only do I create the shapefile with shapefileObj
> > but I also create the dbf file to give it attributes.
> >
> > The result is very nice until the moment I first zoom in. Then all
> > points in the zoom scope tend to disappear! What despair!
> >
> > I'm at a loss as to what to do.
> >
> > I maybe should mention an oddity: in the DBF file, created through PHP
> > functions, the latitude and longitude are given a precision of 1 even
> > though I ask a precision of 10. It is given a precision of 1 *AND* the
> > rest of the precision is zeroes. Could this affect Mapserver printing
> > the points?
> >
> > Any help very welcome. Have a nice day,
> >
> >
> > Anthony
> >
> >
>