Applet/utility for drawing polygons?
Mike Conlow
mike_conlow at YAHOO.COM
Sun Jan 7 08:29:00 PST 2007
Hi: Does anyone know of a good applet or utility to allow clients to draw polygons on a map and feed them to PostGIS?
The issue I am trying to deal with: I have a lot of points and I need to let a client draw a polygon around a subset of those points and tag them with their name or a code or something. I think the easiest way is to pass the polygon to PostGIS...but if there are other ways that I haven't thought of...
Thanks,
Mike
----- Original Message ----
From: Eduardo Zenaide <ezenaide at GMAIL.COM>
To: MAPSERVER-USERS at LISTS.UMN.EDU
Sent: Friday, January 5, 2007 12:50:07 PM
Subject: [UMN_MAPSERVER-USERS] Expressions
hi, all,
i'm trying to understand how expressions work here.
i have one layer with IDH_2000 class wich has lots of numerical values.
i try using ("[IDH_2000]" <= /0.4/) and it returns the error:
msQueryByAttributes(): Search returned no results. No matching record(s) found.
msEvalExpression: Expression parser error. Failed to parse expression
msyyparse(): Expression parser error. syntax error
i think i'm using the wrong syntax, but i've read
http://mapserver.gis.umn.edu/docs/howto/msexpressions
and couldn't get it.
if i do the same but using =~ works :P
so, any clues?
thanks!
--
Eduardo Zenaide
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