Does anyone have a clue how i can make TTQV to understand "Nord de Guerre" "Ancienne Triangulation Francaise (ATF)"?
Regards,
Michel
Sorry wrong forum section => moved it!
Nord de Guerre
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What are thr parameters of this grid ?
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Zitat von "jockel"
What are thr parameters of this grid ?
Latitude of Origin = 49° 30' 00"
Central Meridian = 7° 44' 13.95" East of Greenwich
Scale Factor at Origin (mo) = 0.999509082
False Easting was 500 km
False Northing was 300 km
Ellipsoid: PlessisBut when i enter these paramaters i exepted to see.
Michel
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Hi!
So, do we habe a working parameter set for Nord de Guerre?
Mike
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Hi Mike,
Zitat von "MikeG"So, do we habe a working parameter set for Nord de Guerre?
It is not if "we" have them, but rather, if some responsible authorities
determined and published the respective parameters (df, dx, dy, dz) in
comparsion to WGS 84. Only if they exist, we can create a parameter set.
I have not seen these parameters until now !It looks like the owner of this document has calculated them, but the
parameters are not included ! -
Sure, Jockel - the "we" was meant more towards the whole community rathan you/the TTQV team.
Will this help
# Nord de Guerre
<27500>
+proj=lcc
+lat_1=49.49999999999999
+lat_0=49.49999999999999
+lon_0=7.737229166666666
+k_0=0.99950908
+x_0=500000
+y_0=300000
+a=6376523
+b=6355862.933255573
+pm=2.337229166666667
+units=mI can't figure out what a, b and pm are.
Mike
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Mike,
no, this is the same as above, the parameters for the projection!
The conversion parameters "ATF" -->> "WGS84" are missing.
