I currently maintain an enterprise geodatabase where the data is projected in a state plane coordinate system. Recently the data has extended past state boundaries. The data units are in feet and polylines do contain M values. I am concerned measures and GIS lengths(lengths are very important in the database) could become skewed as GIS data extends farther away from state boundaries.
In order to address this issue I am considering projecting the data into a new database using a non-state, regionally based coordinate system such as an UTM Zone.
My questions are following:
- Would if be acceptable to just leave the data in state plane knowing measures are maintained?
- Are there any issues with projecting from state plane into UTM Zone?(I have never done this for an SDE database) Could English units to Metric Units be a concern?
- Any suggestion or tips regarding this type of conversion?