High Accuracy Elevation Data for Hydrological Modeling

Elevation data is collected on a 400 by 400 meter grid aligned with USGS 7.5-minute quadrangles. The U.S. Geological Survey coordinates acquisition to support ecosystem restoration, with data referenced to NAD83 and NAVD88 datums. This project provides high-accuracy inputs for parameterizing hydrologic and ecological simulation models.

Use Cases

• Parameterize hydrologic models using the 400m grid elevation data to simulate sheet flow and water surface levels in wetlands.
• Calibrate ecological simulation models for restoration activities with elevation data meeting a +/-15 cm vertical accuracy specification.
• Provide vertical reference points for water level gauges using differential GPS-collected elevation data.
• Analyze terrain relief for expansive, flat areas using elevation values referenced to the NAVD88 vertical datum.

Strengths

• Data meets a high vertical accuracy specification of +/-15 centimeters relative to NAVD88.
• Elevation values are collected on a standardized 400 by 400 meter grid.
• Data coverage aligns with standard USGS 7.5-minute quadrangles for consistency.

Limitations

• Specific temporal coverage, total geographic extent, and total row/point count are not provided.
• Data availability may be focused on critical areas rather than providing complete regional coverage.
• Data is provided in legacy GIS formats (.cor, .asc, .e00) which may require conversion for modern tools.

Provenance

Source

U.S. Geological Survey (USGS), coordinated through CEOS_EXTRA and sourced from nasa_earthdata.

Collection Method

Collected using state-of-the-art differential global positioning system (GPS) technology and processing techniques.

Time Range

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Freshness

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Geography

Includes critical areas, with specific mention of South Florida wetlands. Data is formatted in 7.5- by 7.5-minute coverages matching USGS quadrangles.