Re: [Geotools-devel] GeoTIFF job code

[Jesse E. <je...@re...>]

Jody Garnett said the following on 07/13/2004 02:02 PM:

>> To Andrea's questions: I'm speaking of the GeoTIFF revision 1.0
>> specification (Specification  Revision 1.8.2  Last modified 10 November
>> 1995) where the parameters are specified by tags.  I'm not planning on
>> implementing all the bells and whistles.  In particular, no fancy-pants
>> rubber sheeting or non-affine translations between raster space and 
>> model
>> space.  (I hope I'm using the terminology correctly.)  I haven't thought
>> much about how to manipulate tag data yet.  Been looking primarily at
>> Geotools code structure to figure out how this might fit in.
>>  
>>
>
I guess you want to build against the 2.0.x stream but you might want to 
look at GridCoverageExchange before you do, at least to understand where 
geotools is going.

The  GridCoverageExchange interfaces are in the 2.1.x build (trunk) in 
the org.geotools.data.coverage.grid package (in the module/main 
directory).  The GridFormatFactorySpi and GridFormatFinder classes look 
for registered format plugins and load them on command.  The arcgrid 
plugin is the only compatible format at the moment.  You might want to 
check it out, its in the plugin/arcgrid directory. 

For a plugin to be loaded and used by GridCoverageExchanges the plugin 
in must have a org.geotools.data.coverage.grid.GridFormatFactorySpi file 
in the META-INF/service directory.  (See the arcgrid example)  Also a 
number of interfaces must be implemented:

org.geotools.data.coverage.grid.Format
org.geotools.data.coverage.grid.GridCoverageReader
org.geotools.data.coverage.grid.GridCoverageWriter
org.geotools.data.coverage.grid.GridFormatSpi

The org.geotools.data.coverage.grid package has a Abstract Format class 
that can help the implementation.  Its a little out of date though, now 
that I think of it.  It could probably be more useful than it is.


Cheers,

Jesse