The API field "bfe_type" describes how the base flood elevation for a region was determined.
|provided||The base flood elevation is provided by FEMA within the flood zone layer.|
|matched||The base flood elevation is provided by FEMA in an additional later, and that layer only has one base flood elevation transect that intersects the flood zone polygon.|
|interpolated||The base flood elevation is provided by FEMA in an additional later. More than one base flood elevation transect intersects the flood zone polygon, and the closest value of these is used.|
|extrapolated||No base flood elevation is provided by FEMA for the flood zone polygon. A value is extrapolated from neighboring values.|
Bodies of Water
The API returns the distance to nearest ten bodies of water. The bodies of water considered are those provided in the USGS National Hydrological Data (NHD) Set with an area greater than 0.25 square kilometers. Streams and not included. The USGS also generally does not include reservoirs, and therefore distance to these are not included.
|areasqkm||area of the polygon in square meters (a body of water may be made of multiple polygons)|
|distkm||distance to the body of water in kilometers|
|filename||name of the file from USGS containing the body of water|
|gnis_id||unique identifier provided by USGS|
|name||name of body of water, generally only available for larger bodies of water|
|state||US state that the body of water is in|
Elevation in feet. Data provided by USGS. Defaults to -1000000 when not available.