Converting GPS coordinates to X/Y ?

Hi

The title says it all. The "addGroup" function (http://wiki.hoggit.us/view/DCS_func_addGroup) takes "X" and "Y" to position the unit I'm tring to add. The problem is that I know I want it to spawn at N42 13.620 E42 39.518. So how do I convert these coordinates to X/Y?

Cheers from Norway

Tried this code, but I the LAV spawned somewhere faaaaar out north west

local coordinate = coord.LLtoLO(42.13982, 42.39503)

local lat, long, alt = coord.LOtoLL(coordinate)
local msg = lat .. ", " .. long .. "\n" .. coordinate.x .. ", " .. coordinate.y .. ", " .. coordinate.z
trigger.action.outText(msg, 10)

  local groupData = {
["visible"] = false,
["taskSelected"] = true,
["route"] = 
{
}, -- end of ["route"]
["groupId"] = 2,
["tasks"] = 
{
}, -- end of ["tasks"]
["hidden"] = false,
["units"] = 
{
	[1] = 
	{
		["type"] = "LAV-25",
		["transportable"] = 
		{
			["randomTransportable"] = false,
		}, -- end of ["transportable"]
		["x"] = coordinate.x,
		["y"] = coordinate.y,
		["z"] = coordinate.z,
		["unitId"] = 2,
		["skill"] = "Excellent",
		["name"] = "Ground Unit1",
		["playerCanDrive"] = true,
		["heading"] = 0.28605144170571,
	}, -- end of [1]
}, -- end of ["units"]
["x"] = coordinate.x,
["y"] = coordinate.y,
["z"] = coordinate.z,
["name"] = "Ground Group",
["start_time"] = 0,
["task"] = "Ground Nothing",
 } -- end of [1]

 coalition.addGroup(country.id.USA, Group.Category.GROUND, groupData)

EDIT:

This is where it is spawning:

Read up on the difference between vec2 and vec3.

Vec2.x = Vec3.x
Vec2.y = Vec3.z

Ground unit spawning uses 2D coordinates, so x = coordinate.x, y = coordinate.z!

Also there is no "z" coordinate, it is labeled as "alt" and only applies to aircraft.

Hi

...I know I want it to spawn at...

Cheers from Norway

You know where you want it to spawn. Go into a mission and press LCntrl-Y, Info Bar Toggle, and it will cycle through the coordinate systems.

Cheers from Colorado!

Thanks guys! It's strange, even though I map the Y coordinate to Z, it still seems very "off" from my lat/long coordinates.

You know where you want it to spawn. Go into a mission and press LCntrl-Y, Info Bar Toggle, and it will cycle through the coordinate systems.

 

Cheers from Colorado!

Strange, the info bar comes up, but it doesn't change coordinate systems when I toggle it again. On the third toggle it disappears again so there's obviously some toggle inbetween... But all I see is lat/long coordinates.

Okay so I tried to figure what lat/long coordinates that are correct to get the group to spawn where I want. This is the code:

-- Initialization
if (initialized == nil) then
initialized = true

end

function test()

local coordinate3 = coord.LLtoLO(42.24, 42.66)
local coordinate2 = {
	x = coordinate3.x,
	y = coordinate3.z
}

local lat, long, alt = coord.LOtoLL(coordinate3)
local msg = coordinate2.x .. "," .. coordinate2.y
trigger.action.outText(msg, 1)



local groupData = {
	["visible"] = false,
	["taskSelected"] = true,
	["route"] = 
	{
	}, -- end of ["route"]
	["groupId"] = 2,
	["tasks"] = 
	{
	}, -- end of ["tasks"]
	["hidden"] = false,
	["units"] = 
	{
		[1] = 
		{
			["type"] = "LAV-25",
			["transportable"] = 
			{
				["randomTransportable"] = false,
			}, -- end of ["transportable"]
			["x"] = coordinate2.x,
			["y"] = coordinate2.y,
			["unitId"] = 2,
			["skill"] = "Excellent",
			["name"] = "Ground Unit1",
			["playerCanDrive"] = true,
			["heading"] = 0.28605144170571,
		}, -- end of [1]
	}, -- end of ["units"]
	["name"] = "Ground Group",
	["start_time"] = 0,
	["task"] = "Ground Nothing",
} -- end of [1]
	
coalition.addGroup(country.id.USA, Group.Category.GROUND, groupData)			

end
test();

So now it's spawning in the correct location, but why can't I use the lat/long coordinates that I read from the F10 map?

See where it spawned:

EDIT: and yes, my mouse pointer is positioned directly above the unit

coord.LLtoLO takes latitude and longitute in (decimal) degrees. The display in the DCS map shows degrees and (decimal) minutes.

latitude of 42.24 degrees:

42 degrees and (60 * 0.24) = 14.400 minutes

longitude of 42.66 degrees:

42 degrees and (60 * 0.66) = 39.600 minutes

To convert the other way, from coordinates displayed in the DCS map to parameters for coord.LLtoLO:

latitude of 42 degrees and 14.4 minutes:

(42 + (14.4/60)) = 42.24

longitude of 42 degrees and 39.6 minutes:

(42 + (39.6/60)) = 42.66

Thank you very much, guys :)