Is there any way to skip the loop in step (2)? gaby
*************************************************************** ** Gabriella Turek [EMAIL PROTECTED] ** ** National Institute of Water & Atmospheric Research (NIWA) ** ** PO Box 8602 Christchurch New Zealand +64-3-343-8067 ** *************************************************************** >>>Jody Garnett <[EMAIL PROTECTED]> 12/11/07 11:02 am >>> When you get back the feature collection of those things "near" to A; you can call the Collection_Max function on the featurecollection directly; this is way faster (and may be optimzied into SQL if your datastore is backed by SQL): - http://docs.codehaus.org/display/GEOTDOC/10+FeatureCollection+Aggregate+Functions Cheers, Jody Gabriella Turek wrote: >I have two shape files, call them A and B. I need to: >(1) find out the features in B that are "near" to each feature in A. >(2) Interrogate an attribute value of these "near" features and pick the >highest value. > >I actually figured out how to do it, but I don't think I am doing it "right", >i.e. using all the tools >at my disposal. > >My steps are: >(1) creat up geometry filter to find features in B close to A >(2) loop thru each feature in A to find these "near" B features >(3) when one is found, interrogate attribute value and establish if it's a new >max > >I get the nagging feeling that I dont' need to do this looping and that - >moreover - I can >have yet another filter which looks for my max value. I've tried a few things >with little success. >Any help will be greatly appreciated. >Gaby > > > > >** Gabriella Turek [EMAIL PROTECTED] >** National Institute of Water & Atmospheric Research (NIWA) >** PO Box 8602 Christchurch New Zealand +64-3-343-8067 > > > >------------------------------------------------------------------------- >SF.Net email is sponsored by: >Check out the new SourceForge.net Marketplace. >It's the best place to buy or sell services for >just about anything Open Source. >http://sourceforge.net/services/buy/index.php > >Geotools-gt2-users mailing list >Geotools-gt2-users@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users > ------------------------------------------------------------------------- SF.Net email is sponsored by: Check out the new SourceForge.net Marketplace. It's the best place to buy or sell services for just about anything Open Source. http://sourceforge.net/services/buy/index.php _______________________________________________ Geotools-gt2-users mailing list Geotools-gt2-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
