Either way, it shouldn't make that much difference to the final solution for horizontal distance. If anyone has a better estimate, however, please let me know.

I estimated it to be approximately 30Вє from the horizon. The angle, Оё, of the gun battery with respect to the player (the horizon being 0Вє) is a parameter which I had to estimate visually. It is the вЂas the crow flies' distance to the objective в‰€ 1300m We need to find the adjacent to determine the horizontal distance. ( Note: values of distance are rounded to the nearest 100m) Therefore, in order to work out the horizontal distance to the objective ONLY (as this is what would be used to apply a scale to the TACMAP), trigonometry must be used. The distance to the gun battery is currently given вЂas the crow fliesвЂ™ it is a combination of both the horizontal and vertical distances to the objective. If youвЂ™re not too fussed about this part, just disregard it and have a look at the final image I link at the end. In order to do this with a reasonable degree of accuracy though, a bit of maths must be done. I think this is groundbreaking, as it now allows us to apply a rudimentary scale to the TACMAP, and get an idea of just how large the open-world section is (for this biome, at least). IвЂ™ve circled it in red in the following screenshot: If you pause the Gameplay Demo at just the right moment when the TACMAP is closing (it literally has to be frame-perfect вЂ“ before even the warthog spawns back in), it actually displays the distance (metres) to the вЂ Gun Battery WestвЂ™, with respect to the playerвЂ™s position. The following is their post on r/HaloStory: A Reddit user by the name of u/jxclarke did the raw calculations using waypoints as reference.

Halo 1 map