About this Dataset

Limited Area Shorelines By Decade

The Maryland Geological Survey (MGS) developed this shoreline feature class as part of a project to calculate updated rate of change information for Anne Arundel, Baltimore, Harford and Prince George's Counties. These 5 counties have specifics related to each for the shoreline erosion anaylsis and the details are designated within the metadata. This shoreline data set spans the time period 1932-2010, and was used as input to the U.S. Geological Survey (USGS) Digital Shoreline Analysis System (DSAS) v4.3 program to calculate long-term and short-term rates of change (erosion and accretion).
Organization: State of Maryland
Last updated: 2025-07-26T19:48:41.705620

Tables

Table 1

@usgov.state_of_maryland_limited_area_shorelines_by_decade.table_1

49.14 MB
57,599 rows
44 columns

CREATE TABLE table_1 (
  "the_geom" VARCHAR,
  "gis_object_id" BIGINT,
  "dsas_date_of_shoreline_segment" TIMESTAMP,
  "dsas_horizontal_positional_uncertainty_m" DOUBLE  -- DSAS Horizontal Positional Uncertainty (m),
  "dsas_source_dataset" VARCHAR,
  "dsas_decade_identifier" BIGINT,
  "dsas_county" VARCHAR,
  "dsas_noaa_project" VARCHAR,
  "dsas_shoreline_information" VARCHAR,
  "attribute" VARCHAR,
  "class" VARCHAR,
  "data_source" VARCHAR,
  "date" VARCHAR,
  "extraction_method" VARCHAR,
  "extraction_technique" VARCHAR,
  "shoreline_feature_code" DOUBLE,
  "feature_code_1" DOUBLE,
  "feature_name" VARCHAR,
  "feature" DOUBLE,
  "from_node_identifier" DOUBLE,
  "date_of_data_capture" VARCHAR,
  "horizontal_accuracy_m" DOUBLE  -- Horizontal Accuracy (m),
  "index" VARCHAR,
  "additional_information" VARCHAR,
  "polygon_to_left_of_arc" DOUBLE,
  "cm7202" DOUBLE,
  "cm7202_id" DOUBLE,
  "quadrangle_name" VARCHAR,
  "resolution" DOUBLE,
  "polygon_to_right_of_arc" DOUBLE,
  "scale" DOUBLE,
  "source_id" VARCHAR,
  "date_of_source_imagery" DOUBLE,
  "survey_date" VARCHAR,
  "t_sheet_map_number" VARCHAR,
  "to_node_identifier" DOUBLE,
  "shoreline_type" VARCHAR,
  "data_set_credit" VARCHAR,
  "fips_state_alpha_code" VARCHAR,
  "noaa_region" VARCHAR,
  "source_citation" VARCHAR,
  "source_resolution" DOUBLE,
  "verification_date" VARCHAR,
  "shape_stlength" DOUBLE  -- Shape.STLength()
);