>An: User-friendly Desktop Internet GIS
>
>Von: Jesse Eichar
>Datum: 20.02.2007 02:13PM
>>On 20-Feb-07, at 4:38 AM, [EMAIL PROTECTED] wrote:
>>Now we have the problem that the map of the wms server is quite
>>colorful and in different scale ranges different colors are the
>>ground color. Therefore the icons (squares, circles, ..) which
>>represent the items of the shapefile are not as good visibile as the
>>user wants it. My idea: Create an shapefile with an polygon, covering
>>the complete world, set its colour to black and give a controller to
>>the user to adjust the opacity. Now the user can dim the brightness
>>of the wms map and the shapfile items (which are on the top of the
>>layer stack) are more visible.
>>
>>ii) Good idea? Bad idea? Bullshit? Is there an internal (in udig)
>>mechanism to adjust the brightness of a png delivered by the wms
>>server?
>
>
>
>I'd suggest creating a style for the feature layer that has a lower
>opacity to tone down the colors use 50% maybe. Or use a different
>color. I think it would be easier. But yes you can modify the
>brightness of a GridCoverage. Never having done it you will have to
>ask the Geotools users list for advice on how to do it.
I tried to create a temporary layer with one polygon but I failed :-) All
that stuff (udig, org.geotools) is quite new for me. Perhaps someone can
help me. Sorry if I'm annoying you.
at first I created the layer:
IGeoResource resource = null;
// (like net.refractions.udig.ui.FeatureTypeEditor#368)
FeatureTypeBuilder featureBuilder =
FeatureTypeBuilder.newInstance("DimLayerFactory");
featureBuilder.addType(AttributeTypeFactory.newAttributeType("name",
String.class, true, Integer.MAX_VALUE));
featureBuilder.addType(AttributeTypeFactory.newAttributeType("geometry",
Polygon.class,true,Integer.MAX_VALUE,null, DefaultGeographicCRS.WGS84));
// (like net.refractions.udig.project.ui.internal.actionsNewLayerAction#41)
resource =
CatalogPlugin.getDefault().getLocalCatalog().createTemporaryResource(featureBuilder.getFeatureType());
if (resource != null){
LayerFactory layerFactory = map.getLayerFactory();
Layer layer = layerFactory.createLayer(resource);
layer.setName("DimLayer");
return layer;
}
this works. I can use the polygon edit tools of the toolbars since it is
the layer with the highest z-order and all other layers are either wms or
based on shape files containing points.
in the second step I want to create a rectangle covering the complete
world. I debugged how the RectangleTool works.. huh.. :) In IDrawCommand I
read the hint that one can either use an EditCommand to create a new
feature or a DrawCommand which won't create a feature in the layer but
which will be executed on every repaint. To create a DrawCommand would mean
to work with the coordinates of the viewpart. This doesn't seem to be the
best way. I would prefer generating a polygon as a feature of the layer. I
tried to understand the model behind Feature and their Attributes but ...
as I said it's all quite new for me.
The polygon should be centered on 0,0 the width should be 360° and the
height 180°.
The feature containing this polygon should be added to layer I created
above. The style of this layer I will change via its styleblackboard and a
sld xml file.
Perhaps someone can help me to solve this problem?
Or I will create a shape file and read it on program start. But an
in-memory solution would be more satisfying.
tony roth
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User-friendly Desktop Internet GIS (uDig)
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