The phrase refers to digital cartographic documents pertaining to Lake Ontario that contain surprising, unusual, or unconventional information. These documents, typically in Portable Document Format, may reveal previously unknown features, updated bathymetric data, historical changes in the shoreline, or unique visualizations of geographical data related to the lake. As an example, a nautical chart showing an unlisted shipwreck location or a geological survey illustrating unexpected subsurface formations would qualify.
Accessing such digital resources can provide considerable value to various groups. For researchers, they offer novel datasets for scientific analysis and hypothesis testing. For recreational boaters and fishermen, the resources could reveal safer navigation routes or promising fishing locations. Furthermore, these documents provide a historical context, allowing for the observation of changes to the lake’s ecosystem and geography over time. The accurate portrayal of information in these materials is crucial for conservation efforts and informed decision-making.