Marine navigation company Savvy Navvy has developed an in-house approach to processing and reconciling fragmented hydrographic data — combining official hydrographic data with expert geospatial data analysis to scale chart coverage faster and with greater accuracy.
The latest rollout adds more than 2,200 U.S. lakes and extends coverage into Estonia, Lithuania and Latvia in Europe, opening more waterways for boaters across the globe to explore. This comes not long after Danish charts from hydrographic offices were also added to the navigation app.
Prioritized by where boaters are most active, the latest update includes all major Minnesota lakes and expands lake coverage in 20 other U.S. states.
“Land mapping across much of the developed world, has benefited from sustained investment over several decades. Hydrographic data, the mapping of water, has a different history,” explained Elena Petru, geospatial data engineer at Savvy Navvy. “Survey cycles are longer, coverage is uneven, and for inland waters like lakes and reservoirs the situation is patchier still.
“Multiple authorities may hold overlapping or conflicting data for the same body of water, formats vary, and there is no single canonical source that can simply be downloaded and trusted. This fragmentation is exactly the challenge our geospatial team is solving through a structured reconciliation process.”
Petru joined Savvy Navvy in 2023, bringing her geomatics background from land data roles into the specific challenges of marine and inland water charting. Her expertise has enabled development of new data pipelines to overcome these marine charting challenges — marking a significant step in Savvy Navvy’s ongoing chart development program being based on unique, comprehensive data.
“You’d be surprised how often official sources do not fully line up. One of the main challenges is that the same lake can be represented slightly differently depending on the dataset. The task was not to pick one and apply it, but to compare sources carefully, understand where they differed, and make informed decisions about how each lake should be represented,” Petru said. “By going beyond official sources with our own expert validation process, we can integrate new regions faster while maintaining high data integrity, which overcomes one of the biggest difficulties in marine navigation. It’s exciting to see this data go live in the Savvy Navvy app knowing boaters can now use it on the water every day.
This approach forms part of Savvy Navvy’s broader data processing pipeline, enabling consistent, repeatable expansion into new regions. Through these data pipelines we can now deliver faster, more expansive chart coverage including waters not yet fully covered by official hydrographic surveys.
Savvy Navvy has been downloaded more than three million times globally. Unlike other boating navigation solutions, Savvy Navvy provides smart routing, giving users optimal routes and dynamic ETAs based on real-time data: departure time, chart information, weather conditions, tide, boat specifications and local regulations. The updated chart coverage is available across both the Savvy Navvy app and its integrated solutions.
Last month Savvy Navvy launched its new waves feature, turning complex wave data into a simple visual view that helps boaters understand how conditions will actually feel on the water.
Worldwide chart coverage is available on all Savvy Navvy plans.
