Convert dg1 to pnm Online: dg12pnm

You can use Tom's Editor to easily convert images from
DuneGraph .DG1 to Portable aNy Map .PNM.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

DG1

DuneGraph is an image format with extension DG1.

PNM

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.