Hi Jukka,
Thanks for the information.
Relating to the TIFF's, I'd still prefer to use one single tool
(specifically FME) for tile/image creation. FME can create pyramids, but
not as part of a GeoTIFF. So I can create separate TIFF files and tile them
if necessary too (either internal tiling or regular tiling), but how do I
get these into GeoServer?
Is there a resource out there which describes the different Raster serving
extensions and the advantages/disadvantages of each?
Cheers,
Jonathan
On 19 December 2012 11:15, Rahkonen Jukka <[email protected]> wrote:
> Hi,****
>
> ** **
>
> The idea is that the GetCapabilities message includes all the necessary
> information about the configured gridsets which are supported by the
> server. After that It is up to the client software or programmer to know
> what to do next. For example uDig knows automatically how to deal with
> WMS-C service once it has read the GetCapabilities. I am remembering that
> QGIS can do the same. With OpenLayers the developer needs to know how to
> make the application to use exactly the same grid system than the server.
> Information delivered by WMS-C, TMS and WMTS GetCapabilities is enough for
> that. For the Web Mercator system configuring OpenLayers is easier****
>
> http://docs.openlayers.org/library/spherical_mercator.html****
>
> ** **
>
> Once you have created the gridset and layers are available from the
> service you have finished your work on the Geoserver/GWS side. Next you
> will need to start reading the client software documents and learning how
> to utilize those services. ****
>
> ** **
>
> FME seems to be able to use inner tiling
> http://docs.safe.com/fme/reader_writerPDF/geotiff.pdf****
>
> ** **
>
> If you want definitely to use FME you can create the tiled tiffs with that
> and handle just the overviews/pyramid layers with GDAL by running gdaladdo
> for the images. Better alternative for Geoserver could be to use
> gdal_retile
> http://docs.geoserver.org/stable/en/user/tutorials/imagepyramid/imagepyramid.html
> ****
>
> ** **
>
> -Jukka Rahkonen-****
>
> ** **
>
> Jonathan Moules wrote:****
>
> ** **
>
> Hi Arne,****
>
> Thanks for the reply. I get what gridsets do (further clarified by your
> reply), I don't understand how to use them. What other parts of GeoServer
> do they interact with? Or what parts of the client software? And how do you
> get the client software to use the same gridsets? The documentation only
> tells me how to create them, it doesn't say what I should do after that.**
> **
>
> ** **
>
> ** **
>
> -----****
>
> ** **
>
> Unfortunately FME can't create GeoTIFFs with overviews and possibly not
> inner tiling too. I'm aware GDAL does but we'd prefer to use FME.****
>
> Does anyone else have any suggestions how to process the rasters?****
>
> Cheers,****
>
> Jonathan****
>
>
>
> ****
>
> On 16 December 2012 23:23, Arne Kepp <[email protected]> wrote:****
>
> If you want to have efficient caching it is crucial that clients ask for
> the tiles that you have already generated. Basically they need to know the
> grid that you are basing your tiles on (origin of the grid, size of each
> tile in terms geographical extent and in terms of pixel size). And you need
> to define this for every zoom level (because for a given resolution the
> tiles may not cover the full extent exactly).
>
> The result is a set of grids, aka gridset, which all your clients need to
> know about and use. The most commonly used, but rarely the best, is the one
> Google- and Bing Maps use for Spherical Mercator.
>
> Not the right person to ask what raster approach is the most efficient,
> but converting the JPEGs to GeoTIFFs with overviews and inner tiling will
> probably be quiet fast, even though they take up more space. Performance on
> that end is less important if you can use tile caching. You can have them
> act as one layer using imagemosaic.
>
> -Arne****
>
>
>
>
>
>
> On 12/14/12 14:21 , Jonathan Moules wrote:****
>
> Hi List,****
>
> A few generic questions.****
>
> ** **
>
> First: What are gridsets actually for? I know how to create them (the
> documentation is very good for that), but I can't figure out what they're
> for.****
>
> ** **
>
> Second: I have a number of large rasters in JPEG2000 format (up to several
> GB in size). GeoServer can't access these (we're not going to use the
> extension). I have FME so can do lots of processing on them if needed:
> What's the best way to serve these up? I was thinking of tiling them (WMS
> can serve tiled data right?). But then the question becomes, which tiling
> system do I use? There seem to be several:****
>
> ** **
>
> imagePyramid -
> http://docs.geoserver.org/stable/en/user/tutorials/imagepyramid/imagepyramid.html?highlight=tiling
> ****
>
> JDBC -
> http://docs.geoserver.org/stable/en/user/tutorials/imagemosaic-jdbc/imagemosaic-jdbc_tutorial.html?highlight=tiling
> ****
>
> imageMosaic -
> http://docs.geoserver.org/stable/en/user/tutorials/image_mosaic_plugin/imagemosaic.html
> ****
>
> ** **
>
> What are the advantages/disadvantages of each? I'm guessing some are
> easier to create/use and possibly faster.****
>
> ** **
>
> Thanks,****
>
> Jonathan****
>
> ** **
>
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