Learn about the Surface Water Overlay, including the definition, benefits, tips, coverage and update frequency.
Available with any of the following subscriptions:
- All plans
Definition
Surface water refer to bodies of water such as rivers, lakes, ponds and oceans, as well as smaller features like streams and reservoirs.
Our Surface Water Overlay is derived from the USGS National Hydrography Dataset
(NHD). The NHD was mapped at 1:24,000 or larger scale (1:63,360 or larger scale in
Alaska). These data were updated and maintained through stewardship partnerships
with states and other collaborative bodies. We display the linear stream (streams, river
centerlines) network as well as water bodies (ponds/lakes/broad rivers).
Key Benefits
- Provides invaluable insights for spatial analysis, resource management and environmental monitoring
- Supports emergency response planning, urban development considerations and recreational planning
- Aid in ecological conservation efforts by identifying critical habitats and biodiversity hotspots
Limitations: Original hydrographic data were compiled to meet National Map Accuracy standards. These standards have been maintained in the process of creating the NHD. At 1:100,000 scale, ninety percent of well-defined features are within 167 feet (0.02 inches at map scale) of their true geographic position. When higher resolution data are created and submitted, the positional accuracy may vary due to processing procedures of the contributing sources. USGS Map Accuracy standards for 1:24,000 scale require ninety percent of well-defined features to lie within 40 feet of their true geographic position.
Coverage
United States of America
Update Frequency
Annual