Who publishes Salt Marsh?

Maryland Department of Information Technology, part of State of Maryland, publishes this dataset on Maryland Open Data.

How often is it updated?

The publisher lists the update frequency as as needed. The last update was on 07/22/2025.

How do I download it?

It is available as CSV, JSON, GeoJSON, XML. Use the links in Files and access, which open the official government source.

Checked Oct 30, 2026

State dataWater

Salt Marsh

Name: Salt Marsh
Creator: State of Maryland
Published: 2025-07-22T02:28:58.000Z

Published by Maryland Department of Information Technology · Updated 07/22/2025 · As needed

Official source Download CSV

Last updated: 07/22/2025; First published 07/22/2025
Update frequency: As needed
Formats: 4; CSV, JSON, GeoJSON
Coverage: Maryland; Statewide

About this dataset

These digital data files are records of salt marsh location and extent as defined by the U.S. Fish & Wildlife Service's National Wetlands Inventory (NWI) program. In coastal Maryland these data were extracted from data mapped by Maryland Department of Natural Resources (MD DNR) using Maryland's Digital Orthophoto Quarter Quads. The wetlands were photo interpreted from the photography flown for the Digital Orthophoto Quarter Quads. These were flown over a period from 1988 to 1995. Outside of coastal Maryland these data were compiled by The Nature Conservancy from other National Wetlands Inventory data developed by USFWS.

Files and access

Links open the official government source

CSV downloadopendata.maryland.govCSV
JSON (SODA API)opendata.maryland.govJSON
GeoJSONopendata.maryland.govGeoJSON
XMLopendata.maryland.govXML

API endpoint: https://opendata.maryland.gov/resource/ut5n-p7y3.json

Links open outside websites we do not control.

Frequently asked questions

Who publishes Salt Marsh?: Maryland Department of Information Technology, part of State of Maryland, publishes this dataset on Maryland Open Data.
How often is it updated?: The publisher lists the update frequency as as needed. The last update was on 07/22/2025.
How do I download it?: It is available as CSV, JSON, GeoJSON, XML. Use the links in Files and access, which open the official government source.

Where this catalog comes from

Data.gov CatalogU.S. General Services Administration
State and local open data portalsSocrata Discovery API
State and city CKAN portalsCalifornia, Virginia, Boston, Houston and more
Government ArcGIS Hub sitesCity and county GIS data

Catalog checked 10/24/2026

We list dataset descriptions only. Downloads and APIs link straight to the official government source, which holds the current version and its terms of use.

Source: Maryland Open Data and Data.gov · Last updated 10/24/2026 · Listing only; the data stays with the publisher