Remember Terence Kawaja's Display Landscape slide, a visual representation of the hopelessly muddled display-ad ecosystem? Hard to avoid it: Mr. Kawaja says its been viewed 90,000 times in more than 60 countries around the world. But that 's being modest. The guide has become the go-to cheat sheet for the display landscape, ubiquitous in conference presentations, board decks, blog posts and investor kits.

Since he published it in 2009, the chart has become a calling card for Mr. Kawaja's latest venture, digital media investment bank Luma Partners. But then there was the obvious next question: Why not decode all the other slices of the digital-ad marketplace, all growing more complex by the day?

Well, now Mr. Kawaja has, publishing what he's calling "LUMAscapes" (branding!) for search, video, mobile, social, commerce and -- coming soon -- gaming.

We're publishing them here, along with Mr. Kawaja's disclaimer: "These landscapes are our best representations of complicated sectors and are not perfect (something about the limitations of 8 1/2" x 11" in 2D). We need -- and encourage -- your expert crowdsourcing to improve both the accuracy and usefulness of the charts. We welcome your feedback and will incorporate these comments as we evolve the LUMAscapes."