MS4W: Queries on classified rasters

[Jeff McKenna]

I also did a quick test of a raster query, with MapServer CGI, with the 
raster classed or not classed, and i get this error:

mapserv(): Web application error. No way to generate a valid map extent 
from selected shapes.

which was reported earlier: 
http://www.nabble.com/Raster-query-gives-error-tf2008561.html#a5517894

Please file the bug as requested by Frank.

jeff



Marco Cerruti wrote:
> Hi all,
> I'm a new user of Mapserver. I'm working with MS4W (version 2.2.3) via 
> CGI and I'm having troubles with queries on classified rasters. Queries 
> on non-classified rasters work fine, while in cases of classified ones 
> (already tried several formats: img, bil, tif, png) I get the following 
> error:
>  
> msDrawShape(): General error message. Unknown layer type.  
>  
> If I comment CLASS definitions the same query shows me correct results 
> (one or more pixels queried, according to the set tolerance, but of 
> course no information on [class] value).
>  
> I post an extract of my mapfile, with the definition of the raster layer 
> and one of its classes. Maybe I'm doing something wrong with class 
> template (and layer header/footer ...).
>  
> Hoping to receive a little help ... and sorry for my English!
>  
> Marco (Italy)
>  
> --- --- --- --- ---
>  
>  
> 
> LAYER # Classificazione vegetazione 2000
> 
>     NAME class_2000
> 
>     DATA "2000/final_after_merging.bil"
> 
>     STATUS OFF
> 
>     TYPE RASTER
> 
>     OFFSITE 0 0 0
> 
>     GROUP "Uso e copertura del suolo"
> 
>     TOLERANCE 0
> 
>     TOLERANCEUNITS pixels
> 
>     PROJECTION
> 
>         "init=epsg:4326"
> 
>     END
> 
>     METADATA
> 
>         TITOLO "Classificazione vegetazione da satellite - Anno 2000"
> 
>         ORDINE "0044"
> 
>     END
> 
>     HEADER "class2000_header.html"
> 
>     FOOTER "class2000_footer.html"
> 
>     CLASSITEM "[pixel]"
> 
>     CLASS
> 
>         NAME "Latifoglie (pure o dominanti)"
> 
>         EXPRESSION ([pixel] = 2)
> 
>         STYLE
> 
>             COLOR 0 255 0
> 
>         END
> 
>         TEMPLATE "class_query.html"
> 
>     END
> 
> END # Fine raster classificazione vegetazione 2000
> 


-- 
Jeff McKenna
DM Solutions Group Inc.
http://www.dmsolutions.ca