About this Dataset

Navigable Waterways

The National Waterway Network is a comprehensive network database of the nation's navigable waterways. The data set covers the 48 contiguous states plus the District of Columbia, Hawaii, Alaska, Puerto Rico and water links between. The nominal scale of the dataset varies with the source material. The majority of the information is at 1:100,000 with larger scales used in harbor/bay/port areas and smaller scales used in open waters.
Organization: State of Maryland
Last updated: 2025-07-26T21:23:32.687506

Tables

Table 1

@usgov.state_of_maryland_navigable_waterways_4284b.table_1

135.03 kB
666 rows
18 columns

CREATE TABLE table_1 (
  "the_geom" VARCHAR,
  "gis_object_id" BIGINT,
  "link_description" VARCHAR,
  "river_name" VARCHAR,
  "milepost_at_starting_node" DOUBLE,
  "milepost_at_ending_node" DOUBLE,
  "line_length_in_miles" DOUBLE,
  "waterway_code" DOUBLE,
  "geographic_class" VARCHAR,
  "functional_class" VARCHAR,
  "waterway_type" BIGINT,
  "noaa_chart_number" DOUBLE,
  "number_of_link_coordinate_pairs" BIGINT,
  "organization_that_modified_link" VARCHAR,
  "modification_date" DOUBLE,
  "compass_heading" VARCHAR,
  "state_postal_abbreviation" VARCHAR,
  "shape_stlength" DOUBLE  -- Shape.STLength()
);