Applying GIS to solve a 200 year mystery

GIS can help researchers make sense of conflicting historical evidence by placing maps, imagery, physical features, and research claims into a shared spatial framework. Instead of evaluating each clue separately, GIS analysis lets teams compare locations, distances, alignments, and patterns to see whether the evidence supports a coherent explanation. 

In Resource Data’s Oak Island case study, GIS Lead Erin King used LiDAR imagery, aerial imagery, information from The Curse of Oak Island TV show, historic survey maps, and cultural resource knowledge to look for spatial relationships across the Island. She described the work as coalescing the show’s datasets into a unifying story through GIS analysis and mapping. 

GIS does not automatically prove a theory, but it helps researchers test whether separate pieces of information reinforce one another or remain disconnected. 

Spatial analysis is useful for historic sites because physical evidence often depends on location, alignment, scale, terrain, and relationships between features. At a site like Oak Island, where theories involve boulders, maps, artifacts, survey markers, and possible construction patterns, location matters as much as the individual objects themselves.
 
Resource Data’s Oak Island case study shows this through the analysis of boulder patterns, including Nolan’s Cross, and their possible relationship to older mapping and drafting principles. Erin King explored whether the boulders could represent triangulations or arc intersections that might help recreate an original surface master plan. 

Spatial analysis gives researchers a more disciplined way to compare theories, focus field investigation, and communicate why certain locations may deserve closer attention. 

GIS can turn a popular mystery into a more evidence driven investigation by grounding theories in measurable geography. It helps move the discussion from interesting stories toward testable relationships between known features, historical maps, terrain data, and artifact interpretations. 

In this case study, Erin King approached the Island’s lore with GIS methods. This included LiDAR analysis, local relief modeling, historic survey map comparison, and artifact analysis. Her work suggested that some features that had been interpreted symbolically might also be understood as practical mapping or survey elements. 

The result is more focused on investigation. By mapping and measuring the relationships between clues, researchers can decide which theories are spatially plausible, and which areas may warrant additional fieldwork. 

LiDAR helps reveal hidden terrain features by capturing detailed ground-surface information that may not be obvious in standard aerial imagery or field observation. When processed carefully, LiDAR can show subtle changes in topography related to roads, pits, spoil piles, agricultural areas, large stones, or other human-scale features. 

In Resource Data’s case study, Erin King used LiDAR data from Nova Scotia’s GeoNOVA site, along with available aerial imagery and historic maps. The LiDAR data gave her a way to examine the Island’s terrain and compare physical features against the theories and maps discussed by Oak Island researchers. 

That improved visibility into site patterns. LiDAR can help investigators see relationships that are difficult to detect from the ground, especially when vegetation, terrain, or the size of the site makes direct interpretation challenging. 

Local relief modeling is a GIS technique that enhances subtle ground-surface features by reducing the visual effect of larger natural landforms such as hills and valleys. This makes smaller, human-scale features easier to see and interpret in the terrain data. 

In Resource Data’s Oak Island case study, Erin King used local relief modeling to enhance the Island’s ground surface and focus on features such as large boulders, agricultural areas, roads, pits, and spoil piles. The case study notes that the derived local relief model created an opportunity to identify hidden features and patterns across the Island. 

By separating broad terrain from smaller features, researchers can spend less time guessing from raw elevation data and more time evaluating patterns that may relate to human activity. 

Historical survey maps and modern GIS work together by letting researchers compare older mapped features with current terrain, imagery, and measured spatial relationships. Historic maps can provide clues, while GIS gives teams tools to test those clues against modern geospatial data. 

In this case study, Erin King combined historic survey maps from previous investigations with LiDAR, aerial imagery, and information from The Curse of Oak Island TV show. This allowed her to look for relationships between boulders, possible survey markers, and theories tied to older mapping traditions. 

That helped create stronger context for research. Instead of treating historic maps as isolated artifacts, GIS helps researchers evaluate how well those maps align with the Island’s physical features and current terrain evidence. 

Ground control points are important because they provide known reference locations that other mapped features can be measured from. In mapping and surveying, control points help establish scale, alignment, and spatial relationships, which makes them central to building a reliable map or plan. 

In this case study, Erin King suggested that “The Anchors” from the Oak Island map presented by Zena Halpern may not depict nautical anchors but could be interpreted as ground control points or survey markers. She proposed that these boulders may have served as starting points for deriving other deliberate boulder positions across the Island, including Nolan’s Cross. 

The operational impact is a more testable mapping theory. If certain features function as reference points, researchers can use them to evaluate alignments and distances rather than relying only on visual resemblance or speculation. 

GIS can help explain relationships between artifacts and landscape features by connecting object interpretation to measurable location, scale, and geometry. For historical or archaeological questions, that means asking not only what an artifact looks like, but how it may have been used in relation to map features around it. 

In Resource Data’s case study, Erin King leveraged her background in cultural resources management and archaeology and her GIS expertise. She proposed that the irregularly shaped lead cross found on Oak Island could function as a precisely sized protractor used to draw a solution map at an approximate scale of 1 inch to 1/10 mile, starting from the anchors. 

This created a richer interpretation framework. GIS allows artifact analysis and spatial analysis to reinforce each other, creating hypotheses that can be examined through measurement, mapping, and further field investigation. 

Teams should communicate GIS based theories by clearly separating observed evidence, analytical interpretation, and unresolved questions. GIS can show patterns and relationships, but responsible communication should avoid treating a spatial theory as proven until it has been validated through additional evidence. 

Resource Data’s Oak Island case study uses careful language around Erin King’s analysis, noting that she asserted, suggested, and suspected certain relationships between mapping tools, boulders, anchors, and Oak Island lore. The case study presents GIS as a way to build a compelling and coherent spatial story, not as a final claim that the mystery is solved. 

This improves credibility. Clear communication helps audiences understand why the analysis matters while preserving trust in the method and leaving room for further testing. 

A GIS analyst can play a central role in multidisciplinary research by connecting geography, data, field evidence, historical documents, and subject matter interpretation. Their value is not only producing maps but helping teams ask better location-based questions and test relationships across datasets. 

In this case study, Erin King brought together GIS analysis, LiDAR, historic survey maps, aerial imagery, information from the show, and cultural resources experience. Her work helped frame how mapping principles such as square, compass, triangulation, and arc intersections might explain physical patterns on the Island. 

A GIS analyst can help researchers, field teams, historians, and decision makers see how separate clues may fit together spatially and where future investigations should focus.