Converting GPS coordinates to X/Y ?

[gromit190]

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

[gromit190]

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:

 

Edited September 20, 2016 by gromit190

[FSFIan]

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!

[Grimes]

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

[Wrecking Crew]

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!

[gromit190]

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

Edited September 21, 2016 by gromit190

[FSFIan]

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

[gromit190]

Thank you very much, guys :)