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County
Redlining Maps from the Home Owners Loan Corporation, 1937
Allegheny County / City of Pittsburgh / Western PA Regional Data Center —
Most of the text in this description originally appeared on the Mapping Inequality Website. Robert K. Nelson, LaDale Winling, Richard Marciano, Nathan Connolly, et... -
Building Footprints
District of Columbia —
Building structures include parking garages, ruins, monuments, and buildings under construction along with residential, commercial, industrial, apartment, townhouses,... -
Certificate of Occupancy
District of Columbia —
All applicants for a Basic Business License operating from a commercial location in the District of Columbia must provide a Certificate of Occupancy (C of O) for the... -
Building Energy Benchmarking
District of Columbia —
The Clean and Affordable Energy Act of 2008 established that all private buildings over 50,000 gross square feet within the District of Columbia, including multifamily... -
City
Vacant Property Indicators
City of Philadelphia —
The location of properties across Philadelphia that are likely to be a vacant lot or vacant building based on an assessment of City of Philadelphia administrative... -
Pedestrian Friendliness Index Census Blocks
District of Columbia —
The Pedestrian Friendliness Index (PFI) scores for each Census block showing how walkable they are, relative to other Census blocks in the District. An area deemed... -
Impervious Surface 2021
District of Columbia —
The dataset contains basemap features that are typically classified as impervious surface, captured in 2021. Some examples of Impervious Surfaces include: Airport... -
State
CA Congress Districts and Membership 2024-2026
State of California —
The 119th Congressional Districts dataset reflects boundaries from January 03, 2025 from the United States Census Bureau (USCB), and the attributes are updated every... -
Sidewalks 2021
District of Columbia —
All public walkways are captured. Sidewalks do not overlap other feature classes unless they are hidden under a bridge or overpass. Cement pads around public swimming... -
City
Housing and Building Permits 2015 to 2018
City of Baltimore —
This dataset represents housing and building permits data from 2015 to 2018. Permits are issued by Baltimore Housing's Office of Permits & Building Inspections... -
Historic Landmarks Points
District of Columbia —
This dataset contains Historic Landmarks (by structure) officially designated by the District of Columbia. This is a consolidated collection of structures with... -
Private Security Camera Rebate Program
District of Columbia —
The Private Security Camera Rebate Program creates a rebate for residents, businesses, nonprofits, and religious institutions to purchase and install security camera... -
Address and Square Suffix Lot Cross Reference
District of Columbia —
The relationship between a property and an address is many-to-many. In DC a SSL (Square, Suffix, Lot) is used to identify a property. One SSL can have multiple... -
Historic Data on DC Buildings
District of Columbia —
Historical Data on the Buildings of Washington DC, collected over 15 years by Brian Kraft, with support from JMT Inc., for the DC Historic Preservation Office. Most of... -
Air Rights Lots
District of Columbia —
Air right lots are reflect a party’s right to construct an improvement above an existing area of land that is not owned by the constructor. They are a type of... -
Greenhouse Gas Inventory
District of Columbia —
DOEE regularly tracks the District’s greenhouse gas emissions in order to measure our progress towards reducing emissions 60% by 2030 and reaching net-zero emissions... -
Building Permits in 2025
District of Columbia —
The dataset contains locations and attributes of building construction and alteration permits applied for and approved by the District of Columbia Department of... -
Tax Lots
District of Columbia —
DC's Real Property Tax Administration defines assessment and taxation lots, often referred to as A&T lots or simply tax lots. These lots are strictly for real... -
Record Lots
District of Columbia —
Record lots are defined by the Department of Buildings (DOB) – Office of the Surveyor (OS) - DC Surveyor. They are official, platted, recorded subdivision lots created...