This event is fired when the DOM contextmenu event is fired on the rectangle. The ImageDraw module provide simple 2D graphics for Image objects. This is easier than storing a separate Map.As another example, you can associate a String ID corresponding to the ID from a data set. The best answers are voted up and rise to the top, Geographic Information Systems Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. But the points remained in their "random" locations from the previous run, some along the polygon borders (even if it was the only point in the polygon). If the event does not occur on a vertex, the value is. With this book, beginners can get all the modern web development knowledge you need from one expert source. Offset points to show multiple points in one location, while simultaneously showing two categories of points, Help with Double Sum (lattice sum) over all integers m,n of 1/(a+m^2+n^2). Uses a URI to reference a ,