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[udig-devel] Shapefiles, marks and zoom
Title: Shapefiles and sld:ExternalGraphic
Hi again,
 
in addition to my mail some hours ago I found that I also have problems when using sld:Mark (see my earlier mail) or when I do not use any sld file at all:
  The marks disappear when zooming in to a certain amount.
 
This is part of the sld file I'm using, so that should not be the reason:
                    <sld:MaxScaleDenominator>1.7976931348623157E308</sld:MaxScaleDenominator>
The scale when the marks disappear is not always the same for a certain set of marks. One time all marks disappear when zooming in deeper than 1:2 Mio., another time they disappear not before zooming in to 1:750000.
 
I also noticed that the marks disappear during panning when because of panning the zoom reaches the above mentioned value.
 
All that happens even when I only have 1 mark.
 
I did not see anything about that in the shapefile specs. I specify a bounding box with x and y set, but z and M (measure) set to 0. And ZoomToLayer works fine for the shapefile layer.
 
Is there anything to pay attention at with respect to the dbf file? What else might be wrong with me?
 
Any hints welcome, cheers
  Michael
 

 
Von: udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx [mailto:udig-devel-bounces@xxxxxxxxxxxxxxxxxxxxx] Im Auftrag von Schneider, Michael
Gesendet: Freitag, 3. November 2006 10:31
An: User-friendly Desktop Internet GIS
Betreff: [udig-devel] Shapefiles and sld:ExternalGraphic

Hi,

I'm using uDIG 1.1 RC4 and in my program I create a shapefile of type MultiPoint (shape type 8). Using this shapefile with uDIG works fine as long as I use a sld file with sld:Mark: All of my about 50 points are shown.

But when I try to use a sld file with sld:ExternalGraphic only 1 of those is shown although more than 1 are in the range of the viewport. When that one currently shown is not in the viewport anymore (because of panning or zooming in) another one is shown. But as I said always only 1 at a time is displayed.

Here are the diffs of the two sld files:

Vergleichen von (<)D:\Projekte\uDIG\data\pin.sld (2310l Byte)
 mit (>)D:\Projekte\uDIG\data\hits.sld (3959l Byte)

25,28c25,55
<                             <sld:ExternalGraphic>
<                                 <sld:OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink" xlink:type="simple" xlink:href=""file:/D:/Projekte/uDIG/data/pin.gif">file:/D:/Projekte/uDIG/data/pin.gif"/>

<                                 <sld:Format>image/gif</sld:Format>
<                             </sld:ExternalGraphic>
---
>                             <sld:Mark>
>                                 <sld:WellKnownName>x</sld:WellKnownName>
>                                 <sld:Fill>
>                                     <sld:CssParameter name="fill">
>                                         <ogc:Literal>#FF0000</ogc:Literal>
>                                     </sld:CssParameter>
>                                     <sld:CssParameter name="fill-opacity">
>                                         <ogc:Literal>0.75</ogc:Literal>
>                                     </sld:CssParameter>
>                                 </sld:Fill>
>                                 <sld:Stroke>
>                                     <sld:CssParameter name="stroke">
>                                         <ogc:Literal>#000000</ogc:Literal>
>                                     </sld:CssParameter>
>                                     <sld:CssParameter name="stroke-linecap">
>                                         <ogc:Literal>butt</ogc:Literal>
>                                     </sld:CssParameter>
>                                     <sld:CssParameter name="stroke-linejoin">
>                                         <ogc:Literal>miter</ogc:Literal>
>                                     </sld:CssParameter>
>                                     <sld:CssParameter name="stroke-opacity">
>                                         <ogc:Literal>1.0</ogc:Literal>
>                                     </sld:CssParameter>
>                                     <sld:CssParameter name="stroke-width">
>                                         <ogc:Literal>2.0</ogc:Literal>
>                                     </sld:CssParameter>
>                                     <sld:CssParameter name="stroke-dashoffset">
>                                         <ogc:Literal>0.0</ogc:Literal>
>                                     </sld:CssParameter>
>                                 </sld:Stroke>
>                             </sld:Mark>
33c60
<                                 <ogc:Literal>75.0</ogc:Literal>
---
>                                 <ogc:Literal>20.0</ogc:Literal>

Any hints where I do something wrong?

Cheers
  Michael 

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