For example, when I try this:
cs2cs +proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs +to +proj=tmerc +lat_
0=22.31213333333334 +lon_0=114.1785555555556 +k=1 +x_0=836694.05 +y_0=819069.8 +
ellps=intl +towgs84=-162.619,-276.959,-161.764,0.067753,-2.24365,-1.15883,-1.094
25 +units=m +no_defs
When I put
114.1689 22.4518
It outputs
835447.18 834705.40 3.11
Can I tell from the result, the accuracy and possible numeric error of the result? Some meters or some percent?