Hello�?

I have some Soviet Union topography map(now this region belongs to Tajikistan).The projections information is Pulkovo1942/Gauss_Kruger.I want to convert them to WGS84.But I don't have the transformation parameters(I just have some GPS points coordinate of this region).I find some transformation parameters(Standard Molodensky Transformations para) on the internet,but I don't now it's accuracy,so I have some questions below.

1�?�Can the transformation error within one meter based on this parameters ?

2�?�Anybody has better method or link to find the accurate transformation parameters?

the transformation parameters link:http://surveying.wb.psu.edu/sur351/DatumTrans/datum_transformations.htm

I have some Soviet Union topography map(now this region belongs to Tajikistan).The projections information is Pulkovo1942/Gauss_Kruger.I want to convert them to WGS84.But I don't have the transformation parameters(I just have some GPS points coordinate of this region).I find some transformation parameters(Standard Molodensky Transformations para) on the internet,but I don't now it's accuracy,so I have some questions below.

1�?�Can the transformation error within one meter based on this parameters ?

2�?�Anybody has better method or link to find the accurate transformation parameters?

the transformation parameters link:http://surveying.wb.psu.edu/sur351/DatumTrans/datum_transformations.htm

The transformation list is originally from DMA/NIMA/NGA (National Geospatial Intelligence Agency). The Pulkovo 1942 to WGS84 entry has accuracy values of -1 for all axes of XYZ coordinates. That's not good! Basically it means the accuracy is unknown.

EPSG has a 4.5 m transformation listed at http://www.epsg-registry.org, ArcGIS supports it as Pulkovo_1942_To_WGS_1984_16. EPSG well-known ID is 15865.

A more accurate transformation usually mean local control points, and someone calculating a transformation themselves.

Melita