Data · dataset · 2025
Rates of Change Baselines
Listed in Maryland Open Data Portal
This conflated baseline consist of two Digital Shoreline Analysis System (DSAS) Process runs.
Description
The original In 2000, the Maryland Geological Survey (MGS) was awarded a Coastal Zone Management grant to complete the acquisition of a recent (ca. 1990) digital shoreline for the coastal regions of Maryland -- the Chesapeake Bay, its tributaries, the coastal bays, and the Atlantic coast. MGS contracted the services of EarthData International, Inc.
(EDI), currently of Frederick, Md., to extract shorelines from an existing wetlands delineation, which was based on photo interpretation of 3.75-minute digital orthophoto quarter quads (DOQQs). The 2000 baseline which were not created seaward includes all Maryland shoreline areas except for Anne Arundel, Baltimore, Calvert, Harford and Prince George's counties currently. The newest (2015) updated baselines were created offshore (seaward) of the shorelines utilized in DSAS analysis.
Read the rest (1 more)
The baselines were created by 1) buffering at a distance of 10m around the master shoreline feature class converting the buffer polygon to a line, and erasing the landward portion of the buffer line; and 2) manually digitizing baselines up the centerline of tributaries/rivers and other areas where baselines were needed but the buffer-created baselines did not reach.
Links
Get the data
- CSV opendata.maryland.gov/api/views/uiib-zeb6/rows.csv?accessType=DOWNLOAD ↗
download · from opendata maryland gov
Where it is published
- Maryland Open Data Portal dataset page opendata.maryland.gov/dataset/Rates-of-Change-Baselines/uiib-zeb6 ↗
landing page · from opendata maryland gov
Catalogue records · 1
- SODA API opendata.maryland.gov/resource/uiib-zeb6.json ↗
metadata API · from opendata maryland gov
Topics
- From keywords
- Earth & Environmental Science
Provenance · 1 source records, 7 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| Maryland Open Data Portal | uiib-zeb6 | 13 d ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 | |
| created_date | source · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 | |
| description | source · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 | /resource/description |
| publication_date | source · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 | |
| title | source · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 | /resource/name |
| updated_date | source · opendata maryland gov | connector:opendata_maryland_gov@1.0.0 |