I need to convert the following image into a line .shp file. I can make the image into whatever type of image file it needs to be before converting. For context, I had started mapping an area by drawing over the map in photoshop but then came across QGIS and finished the project by mapping over the image using lines shapefile layers. I'm now trying to run the lines through a matlab code and the code can only use shapefiles.
I hope my question was clear, I apologize for any mistakes I made since I haven't used QGIS extensively. Thank you!