# Confused by map coordinates
**URL:** https://discourse.cataclysmdda.org/t/confused-by-map-coordinates/22688
**Category:** The Bunker
**Created:** [February 5, 2020, 12:01pm UTC](https://discourse.cataclysmdda.org/t/confused-by-map-coordinates/22688 "2020-02-05T12:01:26Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@Lorelei43](https://discourse.cataclysmdda.org/u/Lorelei43)
#### Post date: [February 5, 2020, 12:01pm UTC](https://discourse.cataclysmdda.org/t/confused-by-map-coordinates/22688/1 "2020-02-05T12:01:26Z")
I have the first Hub01 mission listing the target at coordinate: 131, 124
And yet when I move the mouse over the red star symbol for the mission, the map coordinate at the right bottom of the screen shows: 0’131 and -1’56
I’m mightily confused by how coordinates are calculated on the overland map in fact … Somebody explains?
---
### Author:  [@GiggleGrassGatherer](https://discourse.cataclysmdda.org/u/GiggleGrassGatherer)
#### Post date: [February 5, 2020, 1:29pm UTC](https://discourse.cataclysmdda.org/t/confused-by-map-coordinates/22688/2 "2020-02-05T13:29:54Z")
Yeah it seems there are 2 coordinate systems, one “internal” which we see in mission descriptions(e: and companion info) and which uses contiguous coordinates, and one “external” which is used on overmap itself and increments not at 999 but instead at 200-something or whatever. I don’t remember exact number.
---
### Author:  [@Zhilkin](https://discourse.cataclysmdda.org/u/Zhilkin)
#### Post date: [February 5, 2020, 1:59pm UTC](https://discourse.cataclysmdda.org/t/confused-by-map-coordinates/22688/3 "2020-02-05T13:59:04Z")
Overmap is 180x180 cells.
56+124=180
---
### Author:  [@dpwb](https://discourse.cataclysmdda.org/u/dpwb)
#### Post date: [February 5, 2020, 3:02pm UTC](https://discourse.cataclysmdda.org/t/confused-by-map-coordinates/22688/4 "2020-02-05T15:02:41Z")
I noticed the difference between the mission coords and overmap coords a while back, its definitely a bug of sorts, but idk how to fix it, not really an area I know well.