20260526
15101000
1.0
FALSE
Counties
0.000
-
-
FFRA_Grid_Counties_Bridge_Counties
Relationship
002
Projected
GCS_WGS_1984
Linear Unit: Meter (1.000000)
WGS_1984_Web_Mercator_Auxiliary_Sphere
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20260223
15550600
20260223
15550600
150000000
5000
dataset
20260223
File Geodatabase Table
0.000
Esri ArcGIS 13.1.2.41833
Counties
This table contains a list of the 30 counties within the project extent.
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="text-decoration:underline;">County_Name</SPAN><SPAN>: The county name</SPAN></P><P><SPAN STYLE="text-decoration:underline;">Urban_DV_Processed</SPAN><SPAN>: Denotes if Median DV values exist within the county. </SPAN></P></DIV></DIV></DIV>
This data was generated by AtkinsRéalis.
county
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The FFRA was developed for a 30-county area at 1×1 km resolution to balance computational efficiency and clarity of intent; designed to identify areas warranting outdoor warning sirens, not to site sirens directly.</SPAN></P><P><SPAN>The FFRA is provided for the 30-county area at a spatial resolution of 1-kilometer by 1-kilometer for better computational efficiency as well as to align with input data with the coarsest resolution among those that were used in this study. In addition, the selection of the 1-kilometer by 1-kilometer grid for processing FFRA can avoid confusion about the intent of the product – a finer resolution may give a false impression about the precision or intent of this study. This study is not intended to site sirens as part of outdoor warning siren systems but to identify flash flood-prone areas that warrant sirens. FFRA with a resolution of 1x1 kilometer can adequately serve as foundational information for identifying flash flood-prone areas that warrant sirens given the audible radius for outdoor warning sirens typically ranging from approximately 1 to 2 miles.</SPAN></P></DIV></DIV></DIV>
0
EPSG
6.18.3(9.3.1.2)
Counties
Table
30
OBJECTID
OBJECTID
OID
4
0
0
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
County_Name
County_Name
String
20
0
0
Urban_DV_Processed
Urban_DV_Processed
String
1
0
0