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Terrain Submission for Columbia County, WA
Elevation data, as defined in FEMA's Guidelines and Standards for Flood Risk Analysis and Mapping, describe the digital topographic data that were used to create the data representing the terrain environment of a watershed and/or floodplain. Elevation data requirements allow for flexibility in the types of information used to produce final terrain deliverables. Submission of the terrain data sources allows FEMA to account for the origins of the flood study terrain data. (Source: FEMA Guidelines and Standards for Flood Risk Analysis and Mapping.)