Re: [Geotools-gt2-users] Representing a mesh with GeoTools

[Benoît T. <thi...@ar...>]

Thanks,

It seems however that the GridCoverage2D class will be displayed as a  
raster, i.e. an image composed of pixels representing the values of  
the data. What if I need to draw only the grid lines ? How can I  
change the lines colors depending on the data value ?

Le 19 nov. 08 à 00:57, Michael Bedward a écrit :

> Hi Benoît,
>
> For your regular cells a GridCoverage2D can store data of the type
> that you describe.  Each cell can have multiple values.  You can
> convert the grid to other projections.
>
> See http://javadoc.geotools.fr/2.6/org/geotools/coverage/grid/GridCoverage2D.html
>
> To my knowledge Geotools doesn't presently support irregularly gridded
> data. Depending on the specifics of your data you could handle this
> with a vector layer instead.  I've done something similar when working
> with a lattice of different sized, but still tesselated, cells.  You
> might also want to investigate JGrass which I think supports TINs
> (triangular irregular networks):
> http://jgrass.wiki.software.bz.it/jgrass/JGrass_Wiki
>
> Michael
>
>
> 2008/11/19 Benoît Thiébault <thi...@ar...>:
>> Hi !
>>
>> I would like to manipulate data in a 2D grid (at least viewing it,
>> changing its colors, changing its values, converting from a  
>> projection
>> to another, etc.)
>>
>> This grid, in a first step, is going to be cartesian and regular,  
>> i.e.
>> with dX and dY constant, each cell being a rectangle.
>>
>> The grid will contain values (water depth for example, but other  
>> infos
>> as well), located in the center of the cell or on the edges of the
>> cells.
>>
>> Is the GridCoverage2D class adapted for this usage ?
>>
>> In the future, the grid is planned to be irregular (dX and dY will  
>> not
>> be constant, thus one will need to store each dX and dY or the
>> position of all points of the grids) and even one day with cells that
>> are irregular quadrilaterals. Is there a class adapted for this usage
>> too ?
>>
>> Thanks
>>
>> Kind regards
>>
>> Ben
>>
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>

Benoît Thiébault

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