I'm trying to integrate data in a .dwg file collected by surveyors into an ArcView 10.2 project I have projected as NAD83 UTM Zone 10 N. The survey data is in an undefined coordinate system but I have values for the translation parameters, which are below as described by the surveyors.
Which utilities can perform this transformation?
Our surveys were based on a local assumed coordinate system. To translate our local coordinates to UTM, you will have to (1) apply a scale factor to your UTM mapping coordinates of 0.99960196 and (2) apply the following shifts in northings and eastings : ΔN = 5 441 341.306 & ΔE = 491 604.143. After going thru this procedure, you will have a list of UTM mapping coordinates.