Hi Simone,
thank you for your explanation for the ImageMosiac plugin for timeseries. I
tested it with my own data, and it works very well.
Now I have a slightly different use case:
I have several MODIS scenes with different extents and different time
specifications. My goal is to have one layer with all the MODIS scenes and to
visualize one MODIS scene, if the user gives the correct time of acquisition.
If I use the ImageMosaic plugin, the MODIS scenes were integrated successfully.
When I call the GeoServer "Layer Preview" without a time specification,
GeoServer displays the mosaic from all given MODIS scenes. When I specificate
the time, GeoServer displays nothing.
The given time specification should be correct, it works also on other examples
(but there the different files have the same extent). If I call the
getCapabilities method, the different times where displayed correct. So the
only difference to other examples is the not equal extent from the given files
for the ImageMosaic plugin.
Is there a possibility to display only the specific MODIS scene (when time
attribute is given), even if the scenes don't have the same extent?
Thanks,
Jonas
----- Ursprüngliche Mail -----
> Ciao Jefferson,
> first a few questions:
>
> - can you point can you run a gdalinfo on two of those files and paste
> it over?
> - which version of geoserver are you playing with?
>
> Now about time management in the ImageMosaic plugin. That is still
> undocumented but I can give you a simple example of it is working
> right now.
> I have a attached a simple zip file that you can use as reference; it
> contains a few geotiff from the blue marble over various months, plus
> the properties files needed to driver the indexer
> which I am now going to explain.
> Notice that the outcome index will be a shapefile.
>
> - indexer.properties -
> Drives the indexer to automagically index the directory. Here below
> an explanation of the params:
>
> - TimeAttribute=ingestion tell the indexer which name to use for the
> TimeAttribute in the index
> - Schema= the_geom:Polygon,location:String,ingestion:java.util.Date
> schema for the final index
> -
> PropertyCollectors=TimestampFileNameExtractorSPI[timeregex](ingestion)
> tell the PropertyCollector TimestampFileNameExtractor to extract the
> value of the ingestion attribute for each granule of the mosaic and
> assign it to the ingestion attribute by using the timeregex regular
> expression.
>
> - timeregex.properties -
>
> Contains a regular expression that extract a time from the name of the
> file. In this case regex=[0-9]{6}
>
>
> == How this works ==
> - place the indexer.properites file as well as the sibling regex files
> inside the directory to index
> - point the imagemosaic to that directory and create a coverage for it
>
> A shapefile should be created automatically with the proper fields for
> time management.
> GeoServer will see by default the TIME attribute in the mosaic and
> will expose in the GetCapabilities response. There is one culprit
> though,
> shapefile does not allow time up to millisec since they are based on
> old version of the db4 database file. Therefore we have extended it
> to do so, but you need to enable such extension adding the following
> switch to GeoServer:
>
> -Dorg.geotools.shapefile.datetime=true
>
> Once you get geoserver up and running and you confirm that the
> GetCapabilities looks like this:
>
> http://pastebin.com/CiPPxKBC
>
> you can open up the openlayers preview and play with the TIME in
> ISO8601 format like this:
>
> ...&format=application/openlayers&TIME=2004-05
>
> Hope that helps.
>
> Ciao,
> Simone.
>
>
>
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>
>
> On Thu, Nov 4, 2010 at 3:49 PM, Jefferson Heard
> <[email protected]> wrote:
> > I have the following directory setup:
> > /opt/data/gis/rasters/ndfd/ds.sky
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.01.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.02.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.03.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.04.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.05.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.06.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.07.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.08.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.09.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.10.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.11.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.12.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.13.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.14.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.15.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.16.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.17.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.18.tiff
> > /opt/data/gis/rasters/ndfd/ds.sky/ds.sky.prj
> > All the tiles are exactly the same projection and dimensions, but
> > they're
> > all different timeseries offsets. Is there a way to treat this as a
> > timeseries instead of a mosaic and a way to get the ImageMosaic
> > plugin to
> > recognize all the images? Is there a better way to store a
> > timeseries?
> > Right now I try to create a new imagemosaic store by pointing at
> > the
> > directory and it just whines at me:
> > Could not list layers for this store, an error occurred retrieving
> > them:
> > Unable to acquire a reader for this coverage with format:
> > ImageMosaic
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