This form takes longitude/latitude pairs as input and plots them on a Mercator projection map along with land/sea and political boundaries. The map bounds will be about 10% larger than the bounds of the entered data points.
The default values on the form below yield a nice map of Cape Cod, Massachusetts, generated by supplying the longitude and latitude values of Cape-area towns: Woods Hole, Nantucket, Chatham, Provincetown and New Bedford.