NYC 2080s 100-Year Floodplain: Sea Level Rise Projection

New York City's 100-year floodplain for the 2080s projects a 58-inch sea-level rise based on a 90th percentile climate scenario. This geospatial dataset merges FEMA's Preliminary Work Map data with projections from the New York Panel on Climate Change. It is provided by the Mayor's Office of Long-Term Planning and Sustainability for long-term urban resilience planning.

Use Cases

• Mapping future flood risk zones using the_geom to visualize the projected floodplain.
• Identifying specific geographic features at risk by analyzing the_geom polygon attributes.
• Integrating flood projections with other planning datasets using the Id field for cross-referencing.

Strengths

• Based on authoritative sources: FEMA flood maps and the New York Panel on Climate Change's 90th percentile projections.
• Provides a specific, long-term projection for the 2080s with a defined sea-level rise of 58 inches.
• Available on multiple government data platforms (Socrata, Data.gov), indicating official use and validation.

Limitations

• Key metadata is missing: row count, file size, license, and detailed documentation are not provided.
• The dataset contains only two columns (the_geom, Id), offering minimal attribute data for analysis.
• Update dates conflict between sources (2026-04-23 on Socrata vs. 2025-09-20 on Data.gov), creating uncertainty about the current version.

Provenance

Source

Mayor's Office of Long-Term Planning and Sustainability (OLTPS) on behalf of CUNY Institute for Sustainable Cities (CISC) and the New York Panel on Climate Change (NPCC).

Collection Method

Derived from FEMA's Preliminary Work Map data and NPCC's 90th Percentile Projects for Sea-Level Rise.

Time Range

2080s projection

Freshness

2026-04-23 13:12:37

Geography

New York City, New York, USA