Identification Information

Title Estancia Special Flood Hazard Areas (SFHA)

Date 2013-12-04

Date Type Publication

Cited Responsible Party

Organization Name Earth Data Analysis Center

Role identify

Presentation Form vector digital data

Abstract This vector dataset depicts the 1% annual flood boundary (otherwise known as special flood hazard area or 100 year flood boundary) for its specified area. The data set was generated by heads-up-digitizing flood insurance rate maps available from FEMA's Map Service Center. These maps are for informational use only and should not be used for engineering or insurance purposes. Contact your local floodplain administrator for more information.

Purpose This vector file is intended to be used for planning and mitigation purposes. It is not appropriate to use for engineering or insurance purposes.

Status Complete

Point of 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

Maintenance and Update Frequency As Necessary

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

Access Constraints None

Use Constraints None

Language English

Topic Category boundaries

Extent

Geographic Bounding Box

West Bound -106.078779
East Bound -106.043391
North Bound 34.77797
South Bound 34.753799

Temporal Extent

DateTime 2013-12-13

Data Quality Information

Attribute Accuracy Report

Report This data set contains no additional attributes other than those added by ESRI during the shapefile creation process.

Quantitative Attribute Accuracy Assessment

Attribute Accuracy Value
Attribute Accuracy Explanation

Horizontal Positional Accuracy Report

Report Data was heads up digitized off of georeferenced and mosaiced FEMA FIRM Maps from the Mapping Service Center. Many of these maps were converted by letter from original HUD maps from the 1960's and 1970's. No positional accuracy should be assumed from this dataset.

Quantitative Horizontal Positional Accuracy Assessment

Horizontal Positional Accuracy Value
Horizontal Positional Accuracy Explanation

Vertical Positional Accuracy Report

Report This dataset contains little to no vertical data.

Quantitative Vertical Positional Accuracy Assessment

Vertical Positional Accuracy Value
Vertical Positional Accuracy Explanation

Logical Consistency Report unknown

Completeness Report Data contained in this shapefile is complete to the best of our knowledge.

Lineage

Source Information

Source Citation

Source Scale Denominator

Type of Source Media online

Source Time Period of Content

DateTime 2013-11-30
Source Currentness Reference publication date

Source Citation Abbreviation FIRM

Source Contribution spatial information

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

Process Step

Process Description Special Flood Hazard Boundaries were heads-up-digitized using ESRI ArcGIS Version 10.1.
Process Date 2013-11-15
Process Time
Process Contact

Estancia Special Flood Hazard Areas (SFHA)

Metadata from the RGIS Metadata Repository

Identification Information

Distribution Information

Spatial Reference Information

Data Quality Information

Metadata Reference Information