Surfer exports HTML Image Map files. An HTML Image Map is a PNG image with click-able, hyperlinked areas.
A Surfer plot is exported to a PNG image, and the polygons, rectangles, and rounded rectangles are also exported to an HTML document overlaid on the PNG image. When the HTML file is opened in a web browser, the polygons retain the hyperlinks and link descriptions assigned in Surfer. Users can manually edit the HTML file after exporting to add or edit the hyperlink URLs.