An EA-50 pilot reported his geo-referenced electronic airport diagram mis-located taxiway November at its intersection with Alpha at LNK.

Narrative

[We] departed from the east ramp at LNK. Cleared to taxi to Runway 32; south on Taxiway Alpha; right on November; hold short of Runway 35. We missed the turn on November by monitoring our progress on the geo-referenced [electronically displayed] airport diagram which incorrectly showed our location as north of November on Alpha. Ground Control notified us that we had missed the turn. The pilot flying and pilot not flying both looked at and confirmed the aircraft icon on the taxi diagram showed us north of Taxiway November; i.e. still approaching the taxiway; but we were; in fact; south. I am very concerned that spurious radio frequency signals from an avionics repair facility may have affected GPS performance. If true; this is a significant hazard for aircraft in the area. This should be investigated. Our safety officer has alerted all our crews to be alert to potential erroneous GPS positions on or near LNK.This even was a good reminder to always back up situational awareness during taxi operations by confirming location visually. Do not depend solely on geo-referenced taxi diagrams. We should practice CRM by explicitly communicating taxi clearances and monitoring progress as a crew. A larger issue is the potential adverse impact on situational awareness during taxi operations by depending too heavily on in cockpit automation.