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Flood Hazard Zones - FEMA Digital FIRM

Layer Thumbnail Map

This metadata information is subject to our disclaimer. Metadata information presented here is maintained manually. Therefore, date-sensitive fields such as feature count and date of last update may not be up-to-date. All metadata is subject to errors inherent in a manual process.

Descriptive nameFlood Hazard Zones - FEMA Digital FIRM
File namefp_dfirm
Spatial domainPima County
AbstractFP_DFIRM shows areas in Pima County prone to 100-year and shallow 100-year flood events. ZONES A, AE, AH, AO # and AO - ALLUVIAL FAN # comprise the extent of the 100-year floodplain. The tailing numbers in the ZONE AO strings indicate flood depth in feet.

ZONE D shows areas that have not been mapped by FEMA (primarily federal and tribal lands). Zone X shows areas that have been mapped but are outside of the 500-year floodplain.

ZONE X -SHALLOW 100-YEAR shows the extent of the shallow 100-year floodplain, the 500 year floodplain and Areas protected by levee. The layer FP_ZONEX provides subclassifications for these areas.

Note, FP_LOMX can be used to augment FP_DFIRM for large-scale mapping.

Also note, FP_DFIRM should be used in conjunction with FP_SS for the floodprone land brochure mailings sent out by PCRFCD on an annual basis.

For general FIRM information: See more information.
Known errors/qualificationsA composite of FEMA maps with different scales and years.
Feature typepolygon
Feature count 1,564
Thumbnail Map fp_dfirm.pdf PDF file format   (1,767,826 bytes, PDF created 08/04/2022 )
ProjectionNAD83 HPGN (Parameters)
Field/value metadata Field metadata
Source organizationMichael Baker Jr. Corp.
Source contactMichael Garner 703.960.8800 x3031
Source document or file name
Source date20031002
Source scale
Source formatGeodatabase
Second source nameFEMA
Second source contact
Second source document or file name
Second source date2004
Second source scale
Second source formatShape
Date of last data update
(This date may not be current.)
Last data update byITD GIS
Date/time last touched - Meaning? 2022-08-03  06:09 PM - Enterprise GDB - Library input format
  2022-08-04  01:27 AM - Shapefile
  See coverage files, if any, for date.
On maintenance?Yes
Maintenance organizationPC ITD GIS
Maintenance frequencyVaries
Maintenance descriptionRFCD gets digital files from FEMA, Baker or from other firms, by case number, and gives them to ITD GIS to update the geodatabase.
Original conversion byPC FCD (Richard Davis)
Pima County ITD GIS contactSteve Whitney
Alternate Pima County ITD GIS contacte-mail address
On  Pima County Geospatial Data Portal? Yes

See Metadata Field Descriptions.
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