Whatever happened to Spiritual Mapping?

"It is an attractive package: evangelism is the goal, God is to be praised, Christians work in harmony, and prayer is the foundational method. All that is needed is a spiritual map. How could any Christian possibly be against it?"

It seems our church flirted with this as an evangelism tool maybe 15 years ago. Anyone remember? I never got on board, and neither did the author of this article.