Hi...

 I am trying to add the .tif layer into the geoserver by using the image
mosaic.
 
 I referred the link:


http://docs.geoserver.org/stable/en/user/tutorials/image_mosaic_plugin/imagemosaic.html#tutorial-imagemosaic-extension

 Initially i create the tiles for my .tif file.
 by using the  command:
 
gdal_retile -co "WORLDFILE=YES" -r bilinear -ps 256 256 -of PNG -levels 3
-targetDir D:/tiles D:/sample.tif


The tiles are generated properly.

I created the .shp file for the sample.tif file using the command:

gdaltindex D:\sample\sample.shp D:\sample.tif

once it is done the file are generated like: 
sample.dbf, sample.prj, sample.shp and sample.shx


and i created the property file like:
Name=sample
LocationAttribute=location
AbsolutePath=false
ExpandToRGB=false
Levels=0.518850948,0.518850948
Caching=true
LevelsNum=1
Heterogeneous=false
Envelope2D=775186.322,1432802.257 776260.862,1433572.751
NumFiles=54

here the Levels file is generated automatically is it the correct???
please help me to how to take or check the values of "Levels".

"Envelop2D"
I took the values of it by the command:

gdalinfo D:/sample.tif

Once it is done i added all the files into the single directory including
the tiles,.shp file and the property file in the geoserver /coverages/sample


here sample is the directory i cerated and added all the files.

once it is done i started the geoserver.
selected the Add Stores -> ImageMosaic - Image mosaicking plugin.

Given the data source name.
In url: file:/coverages/sample/sample.shp

once i enter the submit button it showing the Error like:

 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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