jxRui wrote:
Folks,
I know that MapServer can draw dynamic thematic map(choropleth map) via
cgi. I'd like to develope MapServer app via PHP MapScript to realize
the dynamic thematic map. But i find that the PHP MapScript interface
cannot do this.
For instance, i have only one polygon layer about U.S states,and this
layer has 50 fields in the dbf or in MySQL,the most important thing is
that these attributes values varying everyday. When the user select one
of the fields from the droplist component of the MapServer web app in
Firefox or ie
explorer,then the dynamic thematic map wil be drawn automaticly with the
selected fields.
What can i do this via PHP MapScript ? I need your help. Thank a lot to
you first!
Best regards
jxRui
I think the first question is where is the state polygon layer stored
and how is it getting updated?
I would recommend putting it in a PostgreSQL/PostGIS database because:
1) it is easy to load a shapefile into the database
2) it is easy to update the attributes asynchronously to the mapping
without any issues
3) postGIS is well supported and easy to use from mapserver
4) it is the best way to do dynamic thematic maps
Then in you mapfile you can setup the layer with the appropriate
connection parameters for postGIS, and you can change the DATA statement
in php mapscript to select the appropriate SQL to render the map
thematically.
-Steve W
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