Hello Andrew, Nice question :-)
I'm not sure that I understand exactly what you're after. In your example with two adjoining polygons, do you want to keep their common border unchanged and only move vertices on other parts of each polygon's exterior ? My first thought would be to reach for a standard java AffineTransform to do that, set up to scale the polygon area as required. I can imagine there are lots of fiddly bits that will crop up though ! Expanding or reducing an isolated polygon is easy - just standardize the vertex coords by taking the polygon centroid as (0,0) and multiply them by the desired factor. The common boundary bit is an interesting complication though. Perhaps there is some way of treating the non-common border component of each polygon as an elastic cable... for instance, by iteratively moving each vertex towards (decreasing area) or away from (increasing area) the centroid of the polygon and monitoring the change in polygon area. Mmm... even as I type that it's starting to sound unnecessarily complicated. One thing you might not know is that GeoTools relies on another library for it's geometry classes and operations: JTS (Java Topology Suite). There is a JTS discussion list where people are very friendly: if you haven't already I'd recommend posting the same question there to double your chances of getting a useful answer. You can search the archive of the JTS list here: http://n2.nabble.com/jts-devel-f219725.html And join the list to post on it here: http://lists.refractions.net/mailman/listinfo/jts-devel (Don't be put off by the list description being about JTS development - it's a general discussion list as well). Michael ------------------------------------------------------------------------------ Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day trial. Simplify your report design, integration and deployment - and focus on what you do best, core application coding. Discover what's new with Crystal Reports now. http://p.sf.net/sfu/bobj-july _______________________________________________ Geotools-gt2-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
