The documentation for PHP/Mapscript shows that it is possible to query
by attributes using "queryByAttributes" but I must supply the qstring to
get a match. Does anyone know of a way to get a list of unique values
for a given field ?
What I want to do is populate a "select" control (aka combo box) on a
form with the unique values from a field in a shapefile. I'm
essentially building a query form for attribute data that is stored in
shapefiles.
It seems like this shouldn't be too difficult but I'm coming into this
with a GIS background and am relatively new to php and mapserver. Any
help will be appreciated.
J.B.
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John B. Churchill, M.S. http://alx.al.umces.edu/~jchurch/
GIS Specialist (301) 689-7109
University of Maryland Center for Environmental Science
Appalachian Laboratory http://www.al.umces.edu/
Environmental Science Education http://alese.al.umces.edu/
301 Braddock Road
Frostburg, MD 21532
FAX - (301) 689-7200
