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Hydrography

CEGIS research investigates methods to generate, update, and enhance cartographic representations of the surface water of the U.S. and its territories, known as hydrography

Numerous geospatial data collection and analysis techniques are used for this purpose, such as surface water modeling, remote sensing, and cartographic generalization.

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Remote sensing

From small cameras to big satellites, remote sensing involves using sensors to measure things from a distance and is an important tool for mapping. The large breadth of the United States makes measuring and mapping the ever-changing surface water a huge challenge. Remote sensing allows us to understand where and when water is collecting on the earth surface.
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Remote sensing

From small cameras to big satellites, remote sensing involves using sensors to measure things from a distance and is an important tool for mapping. The large breadth of the United States makes measuring and mapping the ever-changing surface water a huge challenge. Remote sensing allows us to understand where and when water is collecting on the earth surface.
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Cartographic representation

Cartographic representation, or symbolization, is how information is displayed on a map.
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Cartographic representation

Cartographic representation, or symbolization, is how information is displayed on a map.
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Modeling surface water

Modeling hydrology is the use of computers to simulate the behavior of water on earth. Hydrologic modeling has been employed for a long time for things like predicting the risk of floods given a certain amount of rain or how building structures like bridges might impact stream flow. Research is underway to adapt modeling tools for use in mapping streams.
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Modeling surface water

Modeling hydrology is the use of computers to simulate the behavior of water on earth. Hydrologic modeling has been employed for a long time for things like predicting the risk of floods given a certain amount of rain or how building structures like bridges might impact stream flow. Research is underway to adapt modeling tools for use in mapping streams.
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Validation of elevation-derived channels

We are developing methods for autonomous validation of elevation-derived hydrographic features using remote sensing data to update the NHD.
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Validation of elevation-derived channels

We are developing methods for autonomous validation of elevation-derived hydrographic features using remote sensing data to update the NHD.
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