US Federal Emergency Management Agency (FEMA)

Data

US Coastal Transects

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1246
5
Added
07 Sep 2018

This dataset was first added to Koordinates on 07 Sep 2018.

The S_Cst_Tsct_Ln table contains information about the Coastal Transect Lines within the flood risk project area, if applicable. The transect lines indicate the location that was used to provide representative topographic information for the coastal flood models used. Hydraulic analyses of coastal flood effects are executed along transects, which are cross sections taken perpendicular to the shoreline, representing a segment of coast with similar characteristics. Transect elevations are interpolated to delineate the coastal flood zones. The spatial elements representing coastal transects are lines that generally extend from offshore all the way across the coastal floodplain. Transects can also extend seaward when wave runup modeling is used to determine coastal flood hazards. This information is needed for the Transect Locator Map table and Coastal Transect Parameters table in the FIS report.

This layer is a component of National Flood Hazard Layer.

Layer ID 96321
Data type Vector linestring
Feature count 14538
Services Vector Query API

US Coastal Transects

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2359
22
Updated
09 Jul 2019

This dataset was last updated on Koordinates on 09 Jul 2019.

The S_Cst_Tsct_Ln table contains information about the Coastal Transect Lines within the flood risk project area, if applicable. The transect lines indicate the location that was used to provide representative topographic information for the coastal flood models used. Hydraulic analyses of coastal flood effects are executed along transects, which are cross sections taken perpendicular to the shoreline, representing a segment of coast with similar characteristics. Transect elevations are interpolated to delineate the coastal flood zones. The spatial elements representing coastal transects are lines that generally extend from offshore all the way across the coastal floodplain. Transects can also extend seaward when wave runup modeling is used to determine coastal flood hazards. This information is needed for the Transect Locator Map table and Coastal Transect Parameters table in the FIS report.

This layer is a component of National Flood Hazard Layer.

Layer ID 25617
Data type Vector linestring
Feature count 16986
Services Vector Query API

Water Areas

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1095
3
Updated
02 Apr 2017

This dataset was last updated on Koordinates on 02 Apr 2017.

Location and attributes for hydrography features shown on FIRM as areas.

The S_Wtr_Ar table contains information about surface water area features. A spatial file with location information also corresponds with this data table. The spatial elements representing surface water area features are polygons. Normally lakes, ponds and other wide bodies of water will be represented as polygons. The main purpose of the S_Wtr_Ar table is to provide a cartographic depiction of the areal surface water features for visual interpretation of the mapping data. As a result, the method for structuring surface water features as polygons is very flexible. This information is used in the Transect Locator Map and the FIRM Panel Index in the FIS report, as well as the FIRM panels.

This layer is a component of National Flood Hazard Layer.

Layer ID 25611
Data type Vector polygon
Feature count 733504 (incl. 6 with empty or null geometries)
Services Vector Query API

US Levees

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1322
15
Updated
04 Jun 2017

This dataset was last updated on Koordinates on 04 Jun 2017.

This table includes levees, floodwalls, or dikes that have been designed for flood control, including those portions that are closure structures, whether or not they have been demonstrated to meet the NFIP requirements in 44 CFR 65.10. This information is shown in the Levees table in the FIS report and on the FIRM panels. The S_Levee table contains information about levees shown on the FIRMs that are accredited and known to be protecting against the 1-percent-annual-chance flood, as well as levees that are provisionally accredited, de-accredited, and never accredited. The purpose of this table is to document the accreditation status of levees, as well as associated information necessary to be shown on the FIRM and for the population of FIS report text related to levee structures. The spatial entities representing levees are lines, drawn at the centerline of levees, floodwalls, and levee closure structures.

This layer is a component of National Flood Hazard Layer.

Layer ID 25598
Data type Vector linestring
Feature count 15006
Services Vector Query API

Hurricane Harvey Wind Contours

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865
6
Added
06 Sep 2018

This dataset was first added to Koordinates on 06 Sep 2018.

© FEMA, NIST, ARA

Layer ID 96312
Data type Vector linestring
Feature count 13
Services Vector Query API

Transect Baselines

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1155
2
Updated
15 Apr 2017

This dataset was last updated on Koordinates on 15 Apr 2017.

The S_Tsct_Basln spatial file contains information about the transect baseline used in the coastal flood hazard model. Typically, the S_Tsct_Basln represents the 0.0-foot elevation contour, the starting point for the transect, and the measuring point for the coastal mapping. The spatial elements representing the transect baselines are lines. When a coastal transect baseline and water lines are available for the same study reach, only the transect baseline shall be shown on the FIRM in order to eliminate overlaps. This information is used in the following tables in the FIS report: Transect Locator Map, as well as in the Flooding Sources Included this FIS Report, Summary of Coastal Analyses, Summary of Topographic Elevation Data Used in Mapping, and Coastal Transect Parameters.

This layer is sourced from hazards.fema.gov.

Layer ID 25529
Data type Vector linestring
Feature count 17808
Services Vector Query API

US FEMA GeoIndex

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1175
11
Updated
02 Apr 2017

This dataset was last updated on Koordinates on 02 Apr 2017.

This layer is sourced from hazards.fema.gov.

Layer ID 25567
Data type Vector multipolygon
Feature count 183995 (incl. 3 with empty or null geometries)
Services Vector Query API

US Communities

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1686
22
Added
17 Sep 2016

This dataset was first added to Koordinates on 17 Sep 2016.

The Census data utilized for developing the Community Layer used 2010 TIGER/Line shapefile datasets (TIGER = Topologically Integrated Geographic Encoding and Referencing). TIGER/Line shapefiles are available for free download from the US Census Bureau and include various legal and statistical geographic areas for which the Census tabulates data. The shapefiles are designed to be used in a GIS environment, with the ability to directly link the geographic areas to Census data via a unique GEOID number.The following TIGER/Line datasets should be used: - Counties and Equivalent Entities –primary legal divisions within each state (counties, parishes, etc)- County Subdivisions –includes both legal areas (Minor Civil Divisions or MCDs) and various statistical areas- Places –includes both legal areas (Incorporated Places) and statistical areas (Census Designated Places or CDPs)- Blocks –the smallest geographical area for which Census population counts are recorded; blocks never cross boundaries of any entity for which the Census Bureau tabulates data, including counties, county subdivisions, places, and American Indian, Alaska Native, and Native Hawaiian (AIANNH) areas- American Indian, Alaska Native, and Native Hawaiian (AIANNH) AreasExtracting and Formatting CIS DataA key component of the community layer is the ability to link CIS information spatially. Data from CIS cannot directly be joined with Census data. The two datasets have community name discrepancies which impede an exact match. Therefore, CIS data needs to be formatted to match Census community names. A custom report can be obtained from CIS to include a CID number, Community Name, County, State, Community Status, and Tribal status for all CIS records. Make sure all CID numbers are six digits and you follow the CIS community naming convention outlined in Table 4.2.1.1 in the Community Layer Update Technical Guide 20131206. Converting the CIS name“ADDISON, VILLAGE OF” to “ADDISON TOWN”involves removing unneeded spaces, comma, and preposition to make the join successful to the Census data. Using a comprehensive report at a national level gains efficiencies as bulk edits can be made. Data for each state should be extracted as needed by separating the CIS data into each type of community corresponding to the Census geography layers used, and a new JoinID column (e.g. ADDISON TOWN) can be created for each dataset allowing the CIS data to be joined to the Census data.

Layer ID 25566
Data type Vector multipolygon
Feature count 28061
Services Vector Query API

US Nodes

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1035
0
Updated
03 Apr 2017

This dataset was last updated on Koordinates on 03 Apr 2017.

Location and attributes of points used to define the topology of the hydrologic network.

The S_Nodes layer is used for hydrologic analyses where nodes were defined as part of the analysis. The contributing drainage area and the discharges for all frequencies required for the flood risk project (e.g. the 10-percent, 2-percent, 1-percent, and 0.2-percent-annual-chance floods) represent the discharges based on the cumulative upstream drainage area. The points or nodes usually lie on the profile baseline, which reside in S_Profil_Basln, or the hydro reach line which resides in S_Hydro_Reach. Nodes can represent sub basin outlets, junctions, reservoirs, structures, or diversions. Note that nodes are required at all flow change locations. This information is used in the following tables in the FIS report: Summary of Discharges, Summary of Summary of Non-Coastal Stillwater Elevations, and Flood Hazard and Non-Encroachment Data for Selected Streams. For hydraulic models that use nodes, such as SWMM or ICPR, the nodes can be used to represent structures or hydraulic elements. In these cases, the nodes and the profile baseline layer are used to represent the hydraulic connectivity of the network. Nodes can also represent more detailed inventory, such as manholes or curb inlets.

This layer is a component of National Flood Hazard Layer.

Layer ID 25632
Data type Vector point
Feature count 29770
Services Vector Query API

US Levee Centerline

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586
1
Added
06 Sep 2018

This dataset was first added to Koordinates on 06 Sep 2018.

Layer ID 96310
Data type Vector multilinestring
Feature count 20068 (incl. 1 with empty or null geometries)
Services Vector Query API
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