They are more than reminiscent of each other! Both GlobalXplorer and Satellites over Seals are using DigitalGlobe’s Tomnod platform for their crowdsourcing data collection. One way to think of this is that the two projects are asking different research questions in different areas of the world, but are using the same technology/methodology to gather data for analysis.
We at DigitalGlobe have been tinkering for some time on the question of how to bring researchers on projects like these high-quality data from crowdsourcing campaigns with citizen scientist volunteers. We have found that the Yes/No model can often bring cleaner data by helping narrow a project’s total search area. Often, depending on the research question, the project will have a second stage focusing on the important features identified in the YES polygons (seals, archaeological sites…)
Thanks for your help with both of these projects.