We have GPS survey projects all over the country (CONUS and OCONUS) and I am wondering what the best practice is for having to deal with multiple coordinate systems. I can go from WGS84 UTM 18N meters on one project to NAD83 TX SP E feet to multiple others in one day.
We're using GeoXH receivers and here's my current flow:
- On one site, I start with GIS source data in say NAD83 NC State Plane feet.
- In PFO: Options -> Coord Sys -> set to NAD83 NC SP feet. Import -> select the shapefile and set the coord sys to NAD83 NC SP feet. Open the imp file. Data Transfer -> Send -> Select the file.
- Then in TerraSync: Setup -> Coord Sys -> NAD83 NC SP feet. Set the imp as a background file, they collect the data, email it back (or toss the GeoXH on my desk).
- Back in PFO, I set the coord sys to whatever their data is in (sometimes it's the same - yay!), transfer, open, diff correct (*question on that later) Export -> set coord system, and back into ArcGIS it goes.
How do I simplify or streamline this workflow?
Would it be better just to reproject the source shapefiles to lat/lon, import and leave PFO and TerraSync in lat/lon, and then reproject in ArcGIS (back to SP or UTM, whatever) to avoid changing the coord sys in PFO and TerraSync back and forth? And is the projection info stored inside the SSF? I know the data only come in as lat/lon from a sat.
It it baffling that what are considered "projects" in PFO do not remember something as essential as the set coordinate system or am I missing a setting?