PNG

The PNG (Portable Network Graphics) format is a lossless image format similar to GIF, but higher in quality (they can contain more than 256 colors) and much smaller in file size. Their file size is slightly larger than FLASH and significantly larger than SVG, however their quality is significantly less than that of both formats. PNG images print only at a low resolution of 72 DPI.

In order to provide interactivity such as drill down and pop up text with PNG images, an image map must be generated. Thus, user interactivity is very limited. The availability of PopUp text will depend on how the browser displays alt text in an image map. Some browsers show it, but wait a few seconds before doing so. Others are not capable of showing PopUp text with PNG images at all.

The PNG format is supported in approximately 90% percent of all web browsers and does not require a plug-in. If your end users run Netscape 4.0 or higher, or Microsoft Internet Explorer 4.01 or higher, their browsers will support PNG images.

In PopChart Server Pro and PopChart Server Enterprise, PNG images are anti-aliased.