Center of the geometry works perfect. I need to get access to any
point inside the polygon feature. I believe I can use an itemQuery on
mapserver to query the attribute but how does mapserver return the
center point? Do I need to create an HTML template for that too?
On Mon, Jun 1, 2009 at 4:11
Yes, you'd need to create a template for that. You could return JSON, XML, csv
or whatever. This would
be the most straightfoward using 5.2 or ideally 5.4.1 (due out today) and the
new style templates. You
could create a template output format to use like so:
OUTPUTFORMAT
NAME 'geom_center'
Thanks a lot Steve. I am able to use the itemquery to fetch the other
attributes correctly but somehow, the center of polygon isn't working
right. Its returning to me, the co-ordinates that are outside the
bounds of the mapping application. All my data is in the actual
geographic co-ordinate
I had my mapfile extent changed and it worked Perfect. Thanks a lot
Steve. It was a great help!
On Tue, Jun 2, 2009 at 4:16 PM, Varun saraf vsaraf@gmail.com wrote:
Thanks a lot Steve. I am able to use the itemquery to fetch the other
attributes correctly but somehow, the center of polygon
MapServer templates can produce a center point for a geometry but it's not a
true centroid but those
aren't guaranteed to be in the polygon. MapScript could be used as well I
suppose. In either case you'd
send a lookup request to the CGI or MapScript, do an attribute query and return
whatever
I am using mapserver 5.0 with google maps and the data source is the
US Census tracts as shape files and dbf files.
On Thu, May 28, 2009 at 2:12 PM, Steve Lime steve.l...@dnr.state.mn.us wrote:
What version are you using? What data source?
Steve
On 5/28/2009 at 10:01 AM, in message
Hi,
I know mapserver uses a point-in-polygon method to find a feature
given a set of co-ordinates, but can it do the same thing reversed?
For example. Each polygon I draw has a number associated with it which
is in a dbf file with the same name as the shp file that mapserver
uses to draw the
I'm not sure if this is what you are doing, but I have done something
similar I think.
When I want to use the centroid geometry of a polygon, what I do is load the
layer into postgis, create a new geometry field called points_geom or
something like that, and write a stand alone program to find
