Convert mda to pnm Online: mda2pnm
You can use Tom's Editor to easily convert images from
Microdesign .MDA to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Microdesign is an image format with extension MDA.
PNM images are uncompressed 24 bit RGB images. Can cannot store Alpha channel. PNM images come in 2 types: binary and text. Especially popular on Linux.