This is a reminder that the Iowa Real Time Network (IaRTN) will be switching from the current NAD83(CORS96) datum to NAD83(2011) datum. The network will go off line at 5:00 pm CST on Friday, January 4, to update the reference station positions to NAD83(2011) and come back online by 7:00 am CST on Monday, January 7.
Make sure you have good control on all existing projects to use for transformation to NAD83(2011), if you plan to use the IaRTN on those projects beginning January 7.
A copy of the webinar presented by Leica Geosystems, on the IaRTN’s change from NAD83(CORS96) to NAD83(2011), is available for replay on the IaRTN website (http://www.iowadot.gov/rtn/index.aspx).
Contact me if you have any questions.
Statewide RTN Coordinator
Iowa Department of Transportation