Lately I've found myself cycling through a lot of cities and I tend to rest the map on top of my handlebars. I thought about getting a handlebar bag with a map holder but I don't need more storage and the map holder wouldn't really work as most hold the maps under a laminated cover and I need to write notes on the map. I got to thinking how a clipboard attached to my handlebars is exactly what I need. I did a quick google search and didin't find much in terms of people making their own or companies selling them online. I thought I'd see if the collective wisdom of the utility forum could help out with my search for a handlebar mounted clipboard.

"a handlebar bag with a map holder" is the safest way to do what you want to do. A rigid clip board on bike handle bars is..well....insane!!

VERY, VERY.....INSANE!!

Not sure why you think that's insane...but ok.

Its very very normal for leaders of Cycle Tourist Cub group rides.
They used to be home-made but Rixen and Kaul make several.

If you want to DIY, then Correx corrugated plastic board is the lightest and safest material.

Yep.......safe.

Which is why handlebars are never made of rigid materials.

look into the SCUBA diving world. I have a scuba slate (it's waterproof, can be written on with regular pencil even under water, but can be cleaned as well) that has a clip on it and is made to mount like a wrist watch and has an attachment for the pencil. It wasn't hard to adapt it to my handlebar. I clip notes to it and jot notes as needed. It won't be the size of a map, but it is about the size of my map pouch.

Well, you could:
1- use a Quart Ziploc bag, cut a couple of slots on the back and stick the folded map inside; I've done this and added a thin sheet of plastic (cut from a rigid lettuce pack I got at the grocery store) as a backer
2- spend some money and get a Jandd or similar map pocket. Jandd makes top-notch products.
3- Use a handlebar bag with a map pocket
4- spend a lot of money and buy a GPS and mount it to your handlebars using a Ram mount. I have a Delorme Earthmate PN40 and a Ram Mount that works well.

Bolt a regular clipboard to this:

https://store.velo-orange.com/index.p...age-mount.html

Out of stock right now.

Small ones are called Cue sheet holders.. a Cue , directions,
reduced to just miles to turns and directions to turn.

A Chart cover , is for Navigation charts, and they need to stay dry..
so is of clear waterproof stuff..
on Tours, I've used those , with big panel maps ,
like Irish & UK Ordinance Survey Maps
just some elastic cords to put it around stuff ..

I had a dry bag for my film camera bag on my front rack to secure the map to..

I think Klick fix has got some products that can be used. https://klickfix.com/index.php?lang=en

I think the biggest challenge isn't finding a map holder, but finding one that holds a map in such a way that the OP can still write on it without having to remove/replace it.

Ipad 2

p clamps and a bolt, or if you want to get fancy you can pick up a handlebar mounted bottle cage adapter and mount it to a clipboard.

Drill a few holes in a clipboard and zip tie it to your bars?