Transparent and Interlace GIF
GIF with being interlaced
Image or photo editors in most case, e.g. the shareware "LviewPro" by L.Loureiro, are available to make an image gif file interlaced. Select the option menu through [File] => [Properties] => [GIF].
The image file is located on <img src=http:/~z00103/Com/map_il.gif>.
GIF with transparent BG color
This property of gif-image file can be made with use of any easy-to-use image editor, e.g. "Microsoft Paint".