The Floodplain Mapping/Redelineation study deliverables depict and quantify the flood risks for the study area. The primary
risk classificatinos used are the 1-percent-annual-chance flood event, the 0.2-percent-annual-chance flood event, and areas
of minimal flood risk. The Floodplain Mapping/Redelineation flood risk boundaries are derived from the engineering information
Flood Insurance Studies (FISs), previously published Flood Insurance Rate Maps (FIRMs), flood harzard analyses performed in
support of the FISs and FIRMs, and new mapping data, where available. The FISs and FIRMs are published by the Federal Emergency
Managemeng Agency (FEMA).
Citation
Title FLOODPLAIN, CALDWELL COUNTY, TEXAS
publication Date
2008-10-20
presentationForm
FEMA-DFIRM-FLOODPLAIN
cited responsible party
-
publisher
organisation Name
Federal Emergency Management Agency
Contact information
Address
, Washington, DC
cited responsible party
-
originator
organisation Name
Halff Associates, Inc. ? FEMA Region VI IDIQ Contractor
cited responsible party
-
originator
organisation Name
Halff Associates, Inc. ? FEMA Region VI IDIQ Contractor
The objective of the Floodplain Mapping/Redelineation data submission is to archive the flood boundary and redelineation data
for a study in a database such that it can be revised and used with minimum effort in future flood insurance studies or map
revisions. This digital data is produced for the purposes of updating/creating a DFIRM database.
Resource language:
eng; USA
Resource progress code:
completed
Resource Maintenance Information
maintenance or update frequency:
unknown
Constraints on resource usage:
Constraints
Use limitation statement:
? No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act
of distribution constitute any such warranty.
Constraints on resource usage:
Legal Constraints
use constraint:
otherRestrictions
Other constraints
Use Constraints: Acknowledgement of FEMA would be appreciated in products derived from these data. This digital data is produced
for the purposes of updating/creating a DFIRM database.
source description
Source Contribution: Spatial and attribute information for flood hazard mapping information.Source Type digital vector data
source citation
Title Flood Insurance Study for Caldwell County and Incorporated Areas
publication Date
2008-01-01
cited responsible party
-
originator
organisation Name
Halff Assocaites, Inc
Resource extent
Temporal Extent
2008-01-01
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy Report
evaluation Method Description
Unknown?
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy
measure Description
The default topographic dataset for this project was USGS 7.5 min quadrangle hypsography. Where available community supplied
topographic data was used since it was assumed to be superior to the USGS data. This assumption was based on the fact that
the community supplied data was acquired with LIDAR technology and was more current and precise than the USGS data.
Quantitative Result
result value 0.0
value Units
Completeness Commission
evaluation Method Description
Data contained in the Floodplain Mapping and Redelineation files reflect the content of the source materials. Features may
have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA
plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing
maps where some generalization has taken place. Flood risk data are developed for communities participating in the NFIP for
use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records
of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic
surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed
analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little
or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage
areas that are greater than one square mile are studied.
Completeness Omission
evaluation Method Description
Data contained in the Floodplain Mapping and Redelineation files reflect the content of the source materials. Features may
have been eliminated or generalized on the source graphic, due to scale and legibility constraints. With new mapping, FEMA
plans to maintain full detail in the spatial data it produces. However, older information is often transferred from existing
maps where some generalization has taken place. Flood risk data are developed for communities participating in the NFIP for
use in insurance rating and for floodplain management. Flood hazard areas are determined using statistical analyses of records
of river flow, storm tides, and rainfall; information obtained through consultation with the communities; floodplain topographic
surveys; and hydrological and hydraulic analysis. Both detailed and approximate analyses are employed. Generally, detailed
analyses are used to generate flood risk data only for developed or developing areas of communities. For areas where little
or no development is expected to occur, FEMA uses approximate analyses to generate flood risk data. Typically, only drainage
areas that are greater than one square mile are studied.
ConceptualConsistency
measure Description
When FEMA revises an FIS, adjacent studies are checked to ensure agreement between flood elevations at the boundaries. Likewise
flood elevations at the confluence of streams studied independently are checked to ensure agreement at the confluence. The
FIRM and the FIS are developed together and care is taken to ensure that the elevations and other features shown on the flood
profiles in the FIS agree with the information shown on the FIRM. However, the elevations as shown on the FIRM are rounded
whole-foot elevations. They must be shown so that a profile recreated from the elevations on the FIRM will match the FIS profiles
within one half of one foot.
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version
FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
Metadata contact
-
pointOfContact
individual Name Abigail Bush
organisation Name
Halff Associates, Inc.
Contact information
Telephone
Voice 1-210-798-1895
Address
300 East Sonterra Blvd. Ste 230, San Antonio, Texas, 78258
Country USA