Converting X / Y coordinates to longitude / latitude
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Hello Everyone !
I’m trying to understand the X/Y coordinates in the mission ini file.
I see that it references the bottom left corner of the map.
I’m trying to convert this to longitude / latitude coordinates for briefings and so on.
I see WDP does it, but I’m not sure what the rules are ?
Could anybody help me figure it out please ?What I gather from Korea :
X MIN / MAX : 0 / 3358700 ? (or a bit more ?)
Y MIN / MAX : 0 / 3358700 ? (or a bit more ?)Steerpoints seem to be given with those coordinates :
What are the increments ? Since there seem to be decimals there.
I would love to make a little excel tool that translates those X/Y coordinates to actual longitude / latitude.
Thank you, help would be much appreciated.
Flow.
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Hello flow
here is a link which may be of help.
https://sakgiok.gr/2018/07/15/falcon-4-aircraft-coordinates/#more-136
For what I understood the data are in feet.
As the map is 1024 * 1024 km for Korea, you therefore have 3,359,380 in x and y.
Indeed BMS uses decimals.
In helios we only use the whole part. -
Very interesting ! Thanks a lot
I’ll try to work with that and see if it fits my needs ! -
Another helpful formula to convert is for converting BMS x / y to Tacview coordinates
longitude = west + x * (east - west ) / (width * 819.995);
latitude = south + y * (north - south) / (height * 819.995); -
Thank you !
I made it work with ertiyu’s tip !Quick question though, the coordinates cannot be used with google maps it seems, as Kunsan for instance does not have the “correct” lat/long coordinates in Falcon, correct ?
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If you convert the BMS Coordinates to use with RL things like Google Maps use the Tacview conversion, it’s still not spot on but quite close. The BMS internal conversion due to BMS having a flat world can’t be used outside BMS.
I have done the conversion for Tacview overlay for all Airbases and ILS cones for the Balkans Theater that has been integrated into the latest tacview version. The coordinates match within a few feet in regards of ACMI recording and withing 200m-2km for Realworld locations
For Korea can’t say how close the Tacview converted coordinates match to RL coordinates
Another hint if you are converting BMS objective X /Y which are between 0-1023 (km) the conversion for km to feet is best used with 3279.98 ft per km insteed of RL 3280.84 ft per km