After some investigations I discover one of my mistake. Adding ImageMosaic
store with HGT files converted to GeoTIFF is handled as a raster layer and
so cannot be interpreted as a vector data for gs:BarnesSurface.
So I intend to transform my raster data with gs:RasterAsPointCollection and
chain it with gs:BarnesSurface.
Unfortunately I get one more error:
"Failed to evaluate the process function, error is: Parameter data is
missing but has min multiplicity > 0"
I can't understand error message since there is actually a data parameter in
my SLD. The only delta from my previous SLD is:
...
<ogc:Function name="gs:BarnesSurface">
<ogc:Function name="parameter">
<ogc:Literal>data</ogc:Literal>
<ogc:Function name="gs:RasterAsPointCollection">
<ogc:Function name="parameter">
<ogc:Literal>data</ogc:Literal>
</ogc:Function>
</ogc:Function>
</ogc:Function>
<ogc:Function name="parameter">
<ogc:Literal>valueAttr</ogc:Literal>
<ogc:Literal>GRAY_INDEX</ogc:Literal>
</ogc:Function>
...
I am not very familiar with the chaining process, someone can tell me what
am I doing wrong?
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