Description: Abstract: HYDROGRAPHY_HIGHRES_FLOWLINE_NHD_USGS.SHP is a line shapefile that contains streams, rivers, canals, ditches, artificial paths, coastlines, connectors and pipelines in watersheds in and around Indiana. HYDROGRAPHY_HIGHRES_FLOWLINE_NHD_USGS.SHP is derived from the high-resolution version of the National Hydrography Dataset (NHD), which was made available in 2008. The following is excerpted from metadata provided by the USGS for the high-resolution NHD: "The National Hydrography Dataset (NHD) is a feature-based database that interconnects and uniquely identifies the stream segments or reaches that make up the nation's surface water drainage system. NHD data was originally developed at 1:100,000-scale and exists at that scale for the whole country. This high-resolution NHD, generally developed at 1:24,000/1:12,000 scale, adds detail to the original 1:100,000-scale NHD. (Data for Alaska, Puerto Rico and the Virgin Islands was developed at high-resolution, not 1:100,000 scale.) Local resolution NHD is being developed where partners and data exist. The NHD contains reach codes for networked features, flow direction, names, and centerline representations for areal water bodies. Reaches are also defined on waterbodies and the approximate shorelines of the Great Lakes, the Atlantic and Pacific Oceans and the Gulf of Mexico. The NHD also incorporates the National Spatial Data Infrastructure framework criteria established by the Federal Geographic Data Committee."
Copyright Text: Citation:
Citation_Information:
Originator: U.S. Geological Survey and the U.S. Environmental Protection Agency (Data author)
Originator: Indiana Geological Survey (Data processor)
Originator: Chris Dintaman (Data processor)
Originator: Denver Harper (Data processor)
Publication_Date: 20081218
Title:
HYDROGRAPHY_HIGHRES_FLOWLINE_NHD_USGS: Streams, Rivers, Canals, Ditches, Artificial Paths, Coastlines, Connectors,
and Pipelines in Watersheds of Indiana (U. S. Geological Survey, 1:24,000, Line Shapefile)
Edition: High-Resolution National Hydrography Dataset, 2008
Geospatial_Data_Presentation_Form: Vector digital data
Publication_Information:
Publication_Place: Indianapolis, Indiana
Publisher: United States Geological Survey
Other_Citation_Details:
HYDROGRAPHY_HIGHRES_FLOWLINE_NHD_USGS.SHP is derived from the feature class named "NHDFlowline" of the High-Resolution National Hydrography
Dataset (2008), created by the United States Geological Survey (USGS) and the United States Environmental Protection Agency (EPA).
Personnel of the USGS provided the Indiana Geological Survey an ESRI file geodatabase named NHD11015_IN.MDB. If users desire complete
geodatabases, with all event tables and other modeling resources available in the full data suite, it can be downloaded by subregion
(HUC04 level data) by either of the two Web links:
ftp://nhdftp.usgs.gov/SubRegions/
http://nhdgeo.usgs.gov/viewer.htm
HYDROGRAPHY_HIGHRES_FLOWLINE_NHD_USGS.SHP is intended to be used with three associated shapefiles named HYDROGRAPHY_HIGHRES_POINT_NHD_USGS.SHP,
HYDROGRAPHY_HIGHRES_WATERBODYLINEAR_NHD_USGS.SHP, and HYDROGRAPHY_HIGHRES_WATERBODYDISCRETE_NHD_USGS.SHP.
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Description: The Indiana Best Available Floodplain MappingThe Indiana DNR Division of Water has undertaken a project to create and update traditional Flood Insurance Rate Maps, which are published by FEMA, to include many more stream reaches than are currently officially published in the National Flood Hazard Layer. These additional floodplain data include more than 18,000 stream miles of “Zone A” quality studies, with Base Flood Elevations and Floodway included. This page serves as a resource for obtaining the updated floodplain data for use in a local or county GIS, and for further analysis and planning.Data Sources:The Indiana Floodplain Information PortalThe Indiana Floodplain Information Portal (INFIP) is a mapping application developed by the DNR, Division of Water that provides floodplain information for public use. The portal displays floodplain information from both FEMA and DNR sources, including mapped floodplains and flood elevation points along waterways. In addition, the revised INFIP allows users to generate a Floodplain Analysis and Regulatory Assessment (FARA) by using the FARA Report Generator. A FARA is required for local floodplain permitting and FEMA Letter of Map Amendment applications in A zones.A FARA is also required for regulatory determination when the upstream drainage area is greater than 1 square mile, for areas that are unmapped on the FIRM, or for areas known to be flood prone.Base Flood Elevation (BFE) determinations are often used for proposed development and flood insurance purposes.The Indiana Floodplain Information Portal (INFIP) displays the Best Available Floodplain mapping as well as the BFE.The layers tab allows the user to view the effective layer.A FARA can be generated by selecting “run” once a point is selected.A BFE will be provided for the site, then the FARA should be downloaded and saved by the user for future reference.There is the opportunity for users to submit a site for review if they wish to contest the FARA, if their site is near a stream without a mapped floodplain/floodway, or if their point is nearest to a stream with no floodplain and the tool took the BFE from a different stream.
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