Why doesn Mapedit support .BMP images?
.BMP images do not work in web pages. If you put a .BMP image into an HTML page, without converting it to GIF or JPEG format, your readers will not be able to see it properly depending on what browser software they use. Also, .BMP images are very large, uncompressed files that will cause your ISP to complain about the amount of bandwidth you are using. Since .BMP images do not work in web pages, we saw no reason to include support for them in Mapedit, which would only lead to the false assumption that they can be used in web pages.