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. If anyone can provide insight into which utilities can perform this transformation and the steps necessary to do so, it would be appreciated.
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.