Identification Information

Title Torrance County Flood Insurance Rate Map (FIRM)

Date 2013-12-04

Date Type Publication

Cited Responsible Party

Organization Name Federal Emergency Management Agency

Role identify

Presentation Form remote-sensing image

Abstract This dataset contains the scanned, paper flood insurance rate maps (FIRMs) developed by FEMA and available from the Mapping Service Center.

Purpose These maps were originally intended for insurance purposes but some of them are multiple decades old and may be better suited to hazard mitigation planning. Consult your local floodplain administrator for more information.

Status Complete

Point of Contact

Individual Name

Organization Name Federal Emergency Management Agency

Position Name

Role Point of contact

Voice 1-877-FEMA-MAP

Facsimile

Address

Delivery Point 500 C Street, S.W.
City Washington
Administrative Area District of Columbia
Postal Code 20472
Country USA

Electronic Mail Address fema-mscservice@dhs.gov

Maintenance and Update Frequency none planned

Descriptive Keywords special flood hazard area, SFHA, 100 Year flood zone, 1% annual chance flood zone, flood insurance rate map, FIRM

Access Constraints none.

Use Constraints These maps were downloaded from FEMA's MSC, georeferenced, and then mosaiced when applicable. They should not be used for engineering or insurance purposes. Consult your local floodplain administrator for guidance.

Language English

Topic Category imageryBaseMapsEarthCover

Extent

Geographic Bounding Box

West Bound -106.473336
East Bound -105.263514
North Bound 35.053602
South Bound 34.256762

Temporal Extent

DateTime 2013-11-30

Data Quality Information

Attribute Accuracy Report

Report unknown

Quantitative Attribute Accuracy Assessment

Attribute Accuracy Value
Attribute Accuracy Explanation

Horizontal Positional Accuracy Report

Report unknown

Quantitative Horizontal Positional Accuracy Assessment

Horizontal Positional Accuracy Value
Horizontal Positional Accuracy Explanation

Logical Consistency Report unknown

Completeness Report Complete

Lineage

Process Step

Process Description Appropriate FIRMs were downloaded from the FEMA Mapping Service Center
Process Date 2013-06-01
Process Time
Process Contact

Process Step

Process Description Individual FIRMs were georeferenced in ERDAS IMAGINE. This process required matching control points on the FIRM maps to the same points on a reference image that that had previously been georeferenced. Control points are usually well mapped features such as drainage and road intersections and Public Land Survey System intersections. The statewide 1:24,000 topographic quad map mosaic was selected as the reference image because both these maps and the FIRM maps had similar features to map. The process consisted of opening two viewers side by side on the monitor and displaying the topo mosaic on one viewer and the same area of the FIRM map in the second viewer. Then a feature such as a drainage intersection was selected on the FIRM map and the line and column coordinates of that feature were placed in a table. Then the same feature was selected from the topo mosaic and the actual map coordinates of the feature were entered into the table next to the FIRM line and column coordinate. Then a second feature was located on both viewers and then a third and so on. The features were selected to have a relatively even distribution over the FIRM map area. When all features had been selected the IMAGINE software generates a transformation matrix which calculates the best fit of the FIRM control points to the topo mosaic points. If the operator is satisfied with the calculated fit the command is then given to resample the FIRM map to match the topo mosaic and generate a new FIRM map image which now has map coordinates.
Process Date 2013-06-15
Process Time
Process Contact

Process Step

Process Description When all of the maps for a county had been georeferenced it was possible to trim off all of the extraneous edge data from the maps and mosaic them together based on the georeferenced information present in each of the maps.
Process Date 2013-08-01
Process Time
Process Contact

Metadata Reference Information

File Identifier 4eb62a39-1329-49e1-a90d-eeaaa9da3aad

Metadata Language English

Hierarchy Level Dataset

Date Stamp 2025-03-13

Metadata Standard Name ISO 19115:2003

Metadata Standard Version 1.0

Metadata Contact

Individual Name

Organization Name Earth Data Analysis Center

Position Name Clearinghouse Manager

Role Point of contact

Voice 505-277-3622 ext. 230

Facsimile 505-277-3614

Address

Delivery Point MSC01 1110
Delivery Point 1 University of New Mexico
City Albuquerque
Administrative Area NM
Postal Code 87131-0001
Country USA

Electronic Mail Address clearinghouse@edac.unm.edu

Torrance County Flood Insurance Rate Map (FIRM)

Metadata from the RGIS Metadata Repository

Identification Information

Distribution Information

Spatial Reference Information

Data Quality Information

Metadata Reference Information