View In:   ArcGIS JavaScript   ArcGIS Online Map Viewer   ArcGIS Earth   ArcMap   ArcGIS Pro

View Footprint In:   ArcGIS Online Map Viewer

Service Description: This data was pulled from static data downloaded from FEMA site (https://msc.fema.gov/portal/advanceSearch). It is only the 100yr floodplain boundaries removed from the layer S_Fld_Haz_Ar within the geodatabase NFHL_51_20191011.gdb. Selection query is SFHA_TF = "T". Data was then exported to shapefile and generalized in ArcGISPro (Method: Simplify; Value, Max Allowable Offset = 25ft). 100yr Floodplain being defined as having a 1% chance of flooding within a calendar year. From the FEMA Metadata: The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The FIRM Database is derived from Flood Insurance Studies (FISs), previously published FIRMs, flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Datum of 1983.

Map Name: Layers

Legend

All Layers and Tables

Dynamic Legend

Dynamic All Layers

Layers:

• Floodplain_100yr (0)

Description:

Copyright Text: FEMA

Spatial Reference: 102100  (3857)


Single Fused Map Cache: false

Initial Extent:

XMin: -9232854.879185364
YMin: 4558567.168594258
XMax: -8669397.680063061
YMax: 4820901.408040693
Spatial Reference: 102100  (3857)

Full Extent:

XMin: -9310153.9317
YMin: 4375304.573899999
XMax: -8375698.3989
YMax: 4784701.506700002
Spatial Reference: 102100  (3857)

Units: esriMeters

Supported Image Format Types: PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP

Document Info:

Title:
Author:
Comments: This data was pulled from static data downloaded from FEMA site (https://msc.fema.gov/portal/advanceSearch). It is only the 100yr floodplain boundaries removed from the layer S_Fld_Haz_Ar within the geodatabase NFHL_51_20191011.gdb. Selection query is SFHA_TF = "T". Data was then exported to shapefile and generalized in ArcGISPro (Method: Simplify; Value, Max Allowable Offset = 25ft). 100yr Floodplain being defined as having a 1% chance of flooding within a calendar year. From the FEMA Metadata: The National Flood Hazard Layer (NFHL) data incorporates all Flood Insurance Rate Map (FIRM) databases published by the Federal Emergency Management Agency (FEMA), and any Letters of Map Revision (LOMRs) that have been issued against those databases since their publication date. It is updated on a monthly basis. The FIRM Database is the digital, geospatial version of the flood hazard information shown on the published paper FIRMs. The FIRM Database depicts flood risk information and supporting data used to develop the risk data. The primary risk classifications used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas of minimal flood risk. The FIRM Database is derived from Flood Insurance Studies (FISs), previously published FIRMs, flood hazard analyses performed in support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by FEMA. The NFHL is available as State or US Territory data sets. Each State or Territory data set consists of all FIRM Databases and corresponding LOMRs available on the publication date of the data set. The specification for the horizontal control of FIRM Databases is consistent with those required for mapping at a scale of 1:12,000. This file is georeferenced to the Earth's surface using the Geographic Coordinate System (GCS) and North American Datum of 1983.
Subject: The boundaries for the 100 year floodplain in Virginia as definied by the Federal Emergency Management Agency.
Category:
Keywords: Virginia,Flood Data,100 year floodplain
AntialiasingMode: None
TextAntialiasingMode: Force

Supports Dynamic Layers: true

MaxRecordCount: 1000

MaxImageHeight: 4096

MaxImageWidth: 4096

Supported Query Formats: JSON, geoJSON

Min Scale: 0

Max Scale: 0

Supports Datum Transformation: true



Child Resources:   Info   Dynamic Layer

Supported Operations:   Export Map   Identify   QueryDomains   QueryLegends   Find   Return Updates   Generate KML