⚠️ Pipeline dependency — This dataset contains pre-queried NLCD land cover classes for all US bridge locations. It is shared to avoid re-running ~~906k WMS queries (~~2 hours). See sweetapricity/bridgedeck-nbi for the main bridge dataset.

Overview

NLCD 2021 land cover class queried at each unique US bridge location via the MRLC GeoServer WMS. Land cover is a proxy for urbanization, impervious surface coverage, and drainage characteristics — relevant to bridge deck deterioration through runoff patterns and pollutant exposure.

Source

Source: MRLC National Land Cover Database 2021 API: MRLC GeoServer WMS GetFeatureInfo — queried per bridge lat/lon Resolution: 30m (Landsat-derived) Coverage: CONUS

File	Description
`nlcd_bridge_points.csv`	NLCD class code at each unique bridge location

Schema

Column	Type	Description
`bridge_id`	str	`{state_fips}_{county_fips}_{structure_number}` — joins to NBI
`latitude`	float	Bridge latitude (WGS-84)
`longitude`	float	Bridge longitude (WGS-84)
`nlcd_code`	int	Raw NLCD class code (11–95)

Features Derived

Feature	Description
`nlcd_class`	Simplified category: `urban_high`, `urban_low`, `agriculture`, `forest`, `other`

NLCD Class Grouping

nlcd_code	NLCD Class	Simplified
23, 24	Developed Medium/High Intensity	`urban_high`
21, 22	Developed Open/Low Intensity	`urban_low`
81, 82	Pasture/Cultivated Crops	`agriculture`
41, 42, 43	Forest (all types)	`forest`
All others	Water, wetlands, barren, shrub, grass	`other`

Related Datasets

Repo	Type	Description
`sweetapricity/bridgedeck-nbi`	Primary	National Bridge Inventory
`sweetapricity/bridgedeck-coastal`	Dependency	Coastline reference
`sweetapricity/bridgedeck-elevation`	Dependency	USGS elevation
`sweetapricity/bridgedeck-nlcd`	Dependency	This dataset — NLCD land cover

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Bridgedeck — NLCD Land Cover at Bridge Locations (2021)