Nocera, 38, fired a closing 65 to finish 15 under and claim her 12th Ladies European Tour victory. Ciganda shot a 68 to finish 13 under, with 17-year-old Chinese amateur Jing Yan returning a 67 to claim third place.
Nocera said the win made amends for the disappointment of 2009, when she finished one shot behind Korea's Suh Bo-mi after being penalised two strokes for reporting late to the tee.
"I finished second with a stroke penalty so I didn't feel like I deserved it and I knew I had revenge to take," she said.
"It took me a while but I have my revenge and it's nice."
Nocera fired three birdies on the front nine and then recovered from a three-putt bogey on the 10th by picking up further shots on the 13th, 14th, 16th, 17th and 18th.
She added: "I played really well today and made all the putts I had. I just three-putted 10, but I couldn't play any better, I don't think. It's really nice, I've been struggling for many years with my putting and it's coming back. It's a really good feeling."
Ciganda said. "I'm happy. At least I'm in the top three, that is where you want to be, but only one player can win and I played with Gwladys the first two days. She has been playing great golf and I'm happy for her."
Yan actually led outright after 14 holes but bogeyed the next before Nocera's late charge. England's Charley Hull carded a final round of 70 to finish in a tie for fifth, five behind Nocera.