NOPE
:(
FAQ
Why should the mapper be in GTFO?
  1. It's cool
  2. It would make navigating in fog filled levels fun and enjoyable
  3. Locating lockboxes in rooms would be streamlined
  4. Finding terminals on a first clear would be actually interesting
  5. It could be used with the bio-tracker to allow for a very powerful stealth build
  6. Did I mention it would make fog diving actually fun?
What would the mapper even do?
I AM SO GLAD YOU ASKED!
  1. It would mark static level elements in, say, blue.
  2. It would mark terminals in green.
  3. It would mark resource boxes in orange.
  4. It would mark enemies in red the same color as level elements.
  5. It would be cooldown based, longer than bio-tracker
This would be a STATIC picture of everying as it was when the mapper was used.
This means that if you try to use it on moving enemies, it would only show you where they were when you used it.
This sounds overpowered.
I'd argue it's not overpowered, you're sacraficing a tool slot that could be used to bring mines, c-foam or a sentry to gain more info during stealth. I feel like it would be similar in power to the bio-tracker and think the game sorely needs something that can compete with the bio-tracker in terms of information gathering.
But hey! Maybe I'm missing some factor that makes this completly brokenly OP in your eyes.
If that's the case, please DM me @Dak#0001 on discord.
I'm willing to change my mind on this if you can explain why it would be OP.
please i need it the mapper is so cool and everyone tells me it sucks but it DOESN'T and it's GREAT