Having fallen foul of this a number of times before, you will need to
preprocess the tiles with something like GDAL in order to convert them into
geotiffs with the GeoTiff metadata added - primarily the projection system.

There may be typos, so please check the GDAL pages for syntax, but it will
be something like this:

for %%f in (../250kcol/*.TIF) do gdal_translate -of GTiff -a_srs
"EPSG:27700" -co "COMPRESS=LZW" -co "TFW=YES" -co "TILED=YES" %%f
e:\newrasters\250kcol\%%f

HTH

Rob

On 27 September 2010 13:12, Santiago Ginzburg <
[email protected]> wrote:

>  Hi there,
>
>
>
> I am sending an issue that I could see in many mail lists, but I failed to
> find a concrete solution.
>
>
>
>
>
> I download the uk-1to250k raster files from ordnance survey. (1:250 000
> Scale Colour Raster
> https://www.ordnancesurvey.co.uk/opendatadownload/products.html)
>
>
>
>
>
> I Have my geoserver running on tomcat on win 7 machine. (I also have the
> same error with my linux box).
>
>
>
>
>
> I have my geotiffs (.tif files) together with .tfw files. (56 of each)
>
>
>
> I included an .prj for each file (I read it on many mailing list and forums
> that I should have the projection type file included)  this is (EPGS:27700)
> (add 56 .prj)
>
>
>
>
>
> Copy files on the data/os   ( path from tomcat webapps:
> geoserver\data\data\os) I also have tried from (coverages/os)
>
>
>
> I name the ds name : os250k
>
>
>
> url= file:data/os
>
>
>
>
>
> I get this error
>
>
>
> Could not list layers for this store, an error occurred retrieving them:
> Unable to acquire a reader for this coverage with format: ImageMosaic
>
>
>
>
>
> The log throws this error, here is a short version
>
>
>
> 27 Sep 13:03:37 WARN [geoserver.web] - NewLayerPage does not have a title
> set
>
> 27 Sep 13:03:37 WARN [imagemosaic.ImageMosaicFormat] - This plugin accepts
> File, URL or String. The string may describe a File or
>
> an URL
>
> org.geotools.data.DataSourceException: This plugin accepts File, URL or
> String. The string may describe a File or an URL
>
>         at
> org.geotools.gce.imagemosaic.ImageMosaicReader.<init>(ImageMosaicReader.java:173)
>
>         at
> org.geotools.gce.imagemosaic.ImageMosaicFormat.getReader(ImageMosaicFormat.java:272)
>
>         at
> org.geotools.gce.imagemosaic.ImageMosaicFormat.getReader(ImageMosaicFormat.java:87)
>
> ...
>
>
>
> 27 Sep 13:03:37 INFO [geoserver.web] - Getting list of coverages for saved
> store file:data/os
>
> java.lang.RuntimeException: Could not list layers for this store, an error
> occurred retrieving them: Unable to acquire a reader fo
>
> r this coverage with format: ImageMosaic
>
>         at
> org.geoserver.web.data.layer.NewLayerPageProvider.getItems(NewLayerPageProvider.java:92)
>
>         at
> org.geoserver.web.wicket.GeoServerDataProvider.getFilteredItems(GeoServerDataProvider.java:162)
>
>         at
> org.geoserver.web.data.layer.NewLayerPageProvider.getFilteredItems(NewLayerPageProvider.java:108)
>
>
>
> ...
>
>
>
>         at
> org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1555)
>
>         at java.lang.Thread.run(Thread.java:619)
>
> Caused by: java.lang.Exception: Unable to acquire a reader for this
> coverage with format: ImageMosaic
>
>         at
> org.geoserver.catalog.CatalogBuilder.buildCoverage(CatalogBuilder.java:577)
>
>         at
> org.geoserver.web.data.layer.NewLayerPageProvider.getItems(NewLayerPageProvider.java:72)
>
>         ... 81 more
>
> 27 Sep 13:03:38 INFO [geoserver.catalog] - Disposing grid coverage reader
> 'os1to250k'
>
> 27 Sep 13:03:38 WARN [geoserver.catalog] - Error occured disposing coverage
> reader 'os1to250k'
>
>
>
>
>
>
>
> I would appreciate any help...
>
>
>
>
>
>
>
>
> Intelligent Addressing Ltd. Registered Office: 1 Adam Street, London WC2N
> 6DD Reg. in England No.3863861 VAT No.GB 802258946
>
> This message has been scanned for viruses by BlackSpider 
> MailControl<http://www.blackspider.com/>
>
>
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