The original question was: >Dear list > >I am not a very experienced AVE programmer so before I go through the >hassle of trying to write this myself, does anyone know of a batch >script that can create large numbers of random point themes. Ideally I >want to create c.100 themes of a specified (uniform) number of points >each, randomly located within an irregular polygonal area. > >Any ideas? Many thanks to all who replied. No one has actually produced an extension to do this so far, but it is eminently feasible. For the short term I ended up creating the sets one by one. The two best extensions I found (with really good levels of background documentation for each) were those from from Bill Huber at Quantitative Decisions: www.quantdec.com (see free software, ‘Simple Random Sample’) and Jeff Jenness’ website: http://www.jennessent.com/arcview/random_points.htm cheers for the help!