HowTo proceed the water quality data:

I have many sampling points andmuch more data.
First thing would be: A script asking for a parameter and then for a year.
At those points, where there are data, the color switches Is this possible?
- a legend needs to be creted based on the selection. then the theme is loaded with this generated legend file
each time a new data set is wanted, a new theme is created.
in the first run Ileave out the temporal distinction. This could then be added as well, since the structure remains the same.


woher bekomme ich die GWG-Liste? Ich brauche eine dBase Tabellemit den Key-Valu-Paaren
