View Metadata
Difficult Development Areas, 2024-2025
- Identification Information
- Spatial Data Organization Information
- Entity and Attribute Information
- Distribution Information
- Metadata Reference Information
- Identification Information
- Citation
- Publication Date
- 20250224
- Title
- Difficult Development Areas, 2024-2025
- Geospatial Data Presentation Form
- vector digital data
- Collection Title
- U.S. Department of Housing and Urban Development Maps and GIS Data
- Publication Information
- Publication Place
- Publisher
- United States. Department of Housing and Urban Development
- Abstract
- Difficult Development Areas (DDA) for the Low Income Housing Tax Credit program are designated by U.S. Department of Housing and Urban Development (HUD) and defined in statute as areas with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). DDAs in metropolitan areas are designated along Census ZIP Code Tabulation Area (ZCTA) boundaries. DDAs in non-metropolitan areas are designated along county boundaries. DDAs may not contain more than 20% of the aggregate population of metropolitan and non-metropolitan areas, which are designated separately. To learn more about Difficult Development Areas (DDA) visit: https://www.huduser.gov/portal/datasets/qct.html, for questions about the spatial attribution of this dataset, please reach out to us at GISHelpdesk@hud.gov. Data Dictionary: DD_Difficult Development Areas Date of Coverage: 2023-2024Last Updated: 10-2023
- Purpose
- This service provides spatial data and information on Difficult Development Areas (DDAs) used for the Low Income Housing Tax Credit program. DDAs are designated by U.S. Department of Housing and Urban Development (HUD) and defined in statute as areas with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). DDAs in metropolitan areas are designated along Census ZIP Code Tabulation Area (ZCTA) boundaries. DDAs in non-metropolitan areas are designated along county boundaries. DDAs may not contain more than 20% of the aggregate population of metropolitan and non-metropolitan areas, which are designated separately.
- Temporal Extent
- Currentness Reference
- ground condition
- Time Period
- Beginning
- 20240101
- End
- 20250101
- Bounding Box
- West
- -179.147339
- East
- 179.778467
- North
- 71.390482
- South
- -14.548692
- Theme Keyword
- Economic development projects
- Metropolitan areas
- Cost effectiveness
- Theme Keyword Thesaurus
- lcsh
- Theme Keyword
- boundaries
- economy
- location
- society
- Theme Keyword Thesaurus
- ISO 19115 Topic Categories
- Place Keyword
- United States
- Place Keyword Thesaurus
- geonames
- Temporal Keyword
- Access Restrictions
- This work is in the Public Domain, meaning that it is not subject to copyright.
- Use Restrictions
- HUD and the dataset and metadata authors assume no responsibility for the use or misuse of the dataset. No warranty, expressed or implied is made with regard to the accuracy of the spatial accuracy, and no liability is assumed by the U.S. Government in general, the dataset creators or the U.S. Department of Housing and Urban Development specifically, as to the spatial or attribute accuracy of the data.
- Status
- Complete
- Maintenance and Update Frequency
- Annually
- Point of Contact
- Contact Organization
- U.S. Department of Housing and Urban Development
- Delivery Point
- 451 7th Street SW rm. 8126
- City
- Washington
- State
- D.C.
- Postal Code
- 20410-0001
- Country
- US
- Contact Telephone
- 202-708-1112
- Contact Electronic Mail Address
- GIShelpdesk@hud.gov
- Credit
- U.S. Department of Housing and Urban Development, U.S. Census Bureau
- Native Data Set Environment
- Esri ArcGIS 12.9.3.32739
- Collection
- Title
- U.S. Department of Housing and Urban Development Maps and GIS Data
- Spatial Data Organization Information
- Direct Spatial Reference Method
- Vector
- Point and Vector Object Information
- SDTS Terms Description
- SDTS Point and Vector Object Type
- GT-polygon composed of chains
- Point and Vector Object Count
- 2958
- Entity and Attribute Information
- Entity Type
- Entity Type Label
- Difficult Development Areas
- Entity Type Definition
- This service provides spatial data and information on Difficult Development Areas (DDAs) used for the Low Income Housing Tax Credit program. DDAs are designated by U.S. Department of Housing and Urban Development (HUD) and defined in statute as areas with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). DDAs in metropolitan areas are designated along Census ZIP Code Tabulation Area (ZCTA) boundaries. DDAs in non-metropolitan areas are designated along county boundaries. DDAs may not contain more than 20% of the aggregate population of metropolitan and non-metropolitan areas, which are designated separately.
- Entity Type Definition Source
- U.S. Department of Housing and Urban Development
- Attributes
- OBJECTID
- In ArcGIS, a system-managed value that uniquely identifies a record or feature. (Sequential unique whole numbers that are automatically generated.)
- Definition Source
- HUD Authors
- Shape
- Feature geometry. (Coordinates defining the features.)
- Definition Source
- Esri
- ZCTA5
- Census 2010 ZIP Code Tabulation Area code
- Definition Source
- HUD Authors
- DDA_CODE
- State FIPS Code + County FIPS Code (if non-metro) or HUD Fair Market Rent (FMR) Metropolitan Area (HFMA) code (if small-area)
- Definition Source
- HUD Authors
- DDA_NAME
- County Name (if non-metro) or HFMA Name (if small area)
- Definition Source
- HUD Authors
- DDA_TYPE
- Type of DDA; NM for non-metro, SA for small area
- Definition Source
- HUD Authors
- Shape_Length
- Length of feature in internal units. (Positive real numbers that are automatically generated.)
- Definition Source
- Esri
- Shape_Area
- Area of feature in internal units squared. (Positive real numbers that are automatically generated.)
- Definition Source
- Esri
- Distribution Information
- Distributor
- Stanford Geospatial Center
- Metadata Reference Information
- Metadata Date
- 20250224
- Metadata Contact
- Contact Information
- Contact Organization Primary
- Contact Organization
- Stanford Geospatial Center
- Contact Address
- Address
- Mitchell Bldg. 2nd floor
- Address
- 397 Panama Mall
- City
- Stanford
- State or Province
- California
- Postal Code
- 94305
- Country
- US
- Contact Voice Telephone
- 650-723-2746
- Contact Electronic Mail Address
- brannerlibrary@stanford.edu
- Metadata Standard Name
- FGDC Content Standard for Digital Geospatial Metadata
- Metadata Standard Version
- FGDC-STD-001-1998
Difficult Development Areas, 2024-2025
- Identification Information
- Spatial Reference Information
- Distribution Information
- Content Information
- Spatial Representation Information
- Metadata Reference Information
Identification Information
- Citation
- Title
- Difficult Development Areas, 2024-2025
- Publisher
- United States. Department of Housing and Urban Development
- Publication Date
- 2025-02-24
- Identifier
- https://purl.stanford.edu/jh774th3468
- Geospatial Data Presentation Form
- mapDigital
- Collection Title
- U.S. Department of Housing and Urban Development Maps and GIS Data
- Abstract
- Difficult Development Areas (DDA) for the Low Income Housing Tax Credit program are designated by U.S. Department of Housing and Urban Development (HUD) and defined in statute as areas with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). DDAs in metropolitan areas are designated along Census ZIP Code Tabulation Area (ZCTA) boundaries. DDAs in non-metropolitan areas are designated along county boundaries. DDAs may not contain more than 20% of the aggregate population of metropolitan and non-metropolitan areas, which are designated separately. To learn more about Difficult Development Areas (DDA) visit: https://www.huduser.gov/portal/datasets/qct.html, for questions about the spatial attribution of this dataset, please reach out to us at GISHelpdesk@hud.gov. Data Dictionary: DD_Difficult Development Areas Date of Coverage: 2023-2024Last Updated: 10-2023
- Purpose
- This service provides spatial data and information on Difficult Development Areas (DDAs) used for the Low Income Housing Tax Credit program. DDAs are designated by U.S. Department of Housing and Urban Development (HUD) and defined in statute as areas with high construction, land, and utility costs relative to its Area Median Gross Income (AMGI). DDAs in metropolitan areas are designated along Census ZIP Code Tabulation Area (ZCTA) boundaries. DDAs in non-metropolitan areas are designated along county boundaries. DDAs may not contain more than 20% of the aggregate population of metropolitan and non-metropolitan areas, which are designated separately.
- Temporal Extent
- Currentness Reference
- ground condition
- Time Period
- Begin
- 2024-01-01T00:00:00
- End
- 2025-01-01T00:00:00
- Bounding Box
- West
- -179.147339
- East
- 179.778467
- North
- 71.390482
- South
- -14.548699
- Bounding Box
- West
- -179.147339
- East
- 179.778467
- North
- 71.390482
- South
- -14.548692
- ISO Topic Category
- boundaries
- economy
- location
- society
- Place Keyword
-
United States
- Place Keyword Thesaurus
- geonames
- Theme Keyword
- Economic development projects
- Metropolitan areas
-
Cost effectiveness
- Theme Keyword Thesaurus
- lcsh
- Resource Constraints
- Use Limitation
- HUD and the dataset and metadata authors assume no responsibility for the use or misuse of the dataset. No warranty, expressed or implied is made with regard to the accuracy of the spatial accuracy, and no liability is assumed by the U.S. Government in general, the dataset creators or the U.S. Department of Housing and Urban Development specifically, as to the spatial or attribute accuracy of the data.
- Legal Constraints
- Use Restrictions
- otherRestrictions
- Other Restrictions
- This work is in the Public Domain, meaning that it is not subject to copyright.
- Security Constraints
- Status
- completed
- Maintenance and Update Frequency
- annually
- Collection
- Collection Title
- U.S. Department of Housing and Urban Development Maps and GIS Data
- URL
- https://purl.stanford.edu/jh774th3468
- Language
- eng
- Credit
- U.S. Department of Housing and Urban Development, U.S. Census Bureau
- Point of Contact
- Contact
- HUD eGIS Team
- Delivery Point
- 451 7th Street SW rm. 8126
- City
- Washington
- Administrative Area
- D.C.
- Postal Code
- 20410-0001
- Country
- US
- GIShelpdesk@hud.gov
- Phone
- 202-708-1112
Spatial Reference Information
- Reference System Identifier
- Code
- 3857
- Code Space
- EPSG
- Version
- 6.18.3(9.3.1.2)
Distribution Information
- Format Name
- Shapefile
- Distributor
- Stanford Geospatial Center
- Online Access
- Protocol
- Name
Content Information
- Feature Catalog Description
- Compliance Code
- false
- Language
- eng
- Included With Dataset
- true
- Feature Catalog Citation
- Title
- Entity and Attribute Information
- Feature Catalog Identifier
- 2a537a4f-282f-43fb-ad34-64eb4cf39076UUID
Spatial Representation Information
- Vector
- Topology Level
- geometryOnly
- Vector Object Type
- composite
- Vector Object Count
- 2958
Metadata Reference Information
- Hierarchy Level
- dataset
- Metadata File Identifier
- https://purl.stanford.edu/jh774th3468
- Parent Identifier
- https://purl.stanford.edu/wc590wy7461.mods
- Dataset URI
- https://purl.stanford.edu/jh774th3468
- Metadata Date Stamp
- 2025-02-24
- Metadata Standard Name
- ISO 19139 Geographic Information - Metadata - Implementation Specification
- Metadata Standard Version
- 2007
- Character Set
- utf8