ImagePyramids do not give the user any control as to which pyramid level should be displayed at which zoom level or scale
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Key: GEOS-2302
URL: http://jira.codehaus.org/browse/GEOS-2302
Project: GeoServer
Issue Type: Bug
Components: Configuration
Affects Versions: 1.6.5
Environment: Windows
Reporter: James Cauchi
Assignee: Andrea Aime
Summary:
There is no way to control the scale/zoom level "entry" and "exit" points for each level of a pyramid.
Background:
I have a few gigs worth of map tiles at different map resolutions.
However the step between the resolutions is not 0 2 4 8 16 etc it is
more like 10 20 40 200 1000.
I am using the layers I already have in my pyramid rather than
creating overviews from the bottom layer.
I have created an imagemosaic for each level of the pyramid.
I then created an imagepyramid and imported it into GeoServer using
the ImagePyramidal plugin.
I am using OpenLayers to view my result.
I get seamless zooming between the different layers and all the levels show up.
The problem I am facing is that it enters and exits the levels too
early and hence its a little slow and shows too much complexity on the
map at certain zoom levels. Is there a way to control which level of
the pyramid is shown at a particular scale or zoom level?
Rapid response from Simone Giannecchini:
"The short answer is not, Of course there is a longer answer which i am
going to give you now.
The various coverage plugins can be instructed to use various
different policies for picking up the correct overviews, default,
quality, speed, etc.. The problem is that this is not exposed in the
GeoServer UI at the moment, hence GeoServer always uses the default
behavior (nearest overview). I would suggest you open up a JIRA bug
for this in the GeoServer project so that we can take care of it."
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