Hi Jody, > You used the filter produced when they click ... and process the features > into a Set<FeatureId> > > Set<FeatureId> IDs = new HashSet<FeatureId>();
<snip> > And then to display the features you create a Rule with ... > > selectedRule.setFilter(ff.id(IDs)); > > Can I ask why you do not use the original filter? I thought it might make each step a little more obvious, but now that you point it out I'm not sure that it doesn't just make it seem more complex :-) You choose (and if any other list members have an opinion please speak up - we'd love the feedback). > It could be: > - speed - avoiding a spatial test during every render - and using a feature > id test would be fast > - teaching - it could be an excuse to process a feature collection > I am finding the page clear and well written; so I am loath to change > anything :-) > I also usually produce a different filter when checking where someone > clicks; I produce a 3x3 pixel bounding box; and then: > 1) transform it to mappane crs (ie world coordinates) > 2) transofrm it to the data crs (ie data coordinates) > On the grounds that a BoundingBox query is often the fastest spatial query > you can do, faster then dwithin with less hard math. Yes - that would be much better practice (and I'm noting it down for my own future reference !). But do you think it would make the example look even more complicated ? On the other hand, perhaps when someone has reached the point of braving this one we shouldn't be treating them as a beginner and therefore your suggestion here would be better. I was also planning to put a line or two of text on the page to accompany each code box - you know, old-fogey style :) Michael ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
