Alaska Hydrography, 1:2,000,000

Statewide lakes were assembled from seventeen separate files in the USGS 1:2,000,000 Digital Line Graphs (DLG) dataset and include only those polygons with AREA greater than 20 acres (80940 square meters). Polygons with the attribute MIN = 100 or arcs with the attribute LINECODE = 'L' are valid lakes. For data codes and details, please refer to the US Geological Survey Circular 895, 1982. Due to the limitation of ARC/INFO software at the time of processing these files, the lakes were originally processed into three groups. Then a framework of arcs surrounding those three groups allowed all the lakes to be united into one statewide lakes coverage. Any lakes which were interested either by the boundaries of the seventeen original DLG files or by DNR's framwork were then edgematched and coded as one lake. Statewide rivers and streams were assembled from eighteen files in the USGS 1:2,000,000 Digital Line Graphs (DLG) dataset. Arc with the attributes MIN greater than 0 are valid rivers and streams. From this DLG rivers dataset, the "Major Rivers" dataset was generated. Please refer to this theme, if the eight major rivers of Alaska are what you need. During the detailed review of this layer in preparation for public access, it became apparent the USGS DLG rivers and streams for Alaska dataset is not complete. Several major watersheds in Southwest Alaska are missing. Specific known omissions were Wood River, Kvichak River, Ugashik River, Naknek River, and Egegik River. Subsequent versions of this layer will correct this omission. These rivers and other rivers are not missing from the USGS hydrography layer included in the Digital Chart of the World 1:1,000,000 hydrography database, which is available through Environmental Systems Research Institute.

Data and Resources

Field Value
access_constraints ["Use Constraints: It is not recommended the data be used at a scale larger than 1:2,000,000. Any hardcopies utilizing these data sets shall clearly indicate their source. If the user has modified the data in any way they are obligated to describe the types of modifications they have performed on the hardcopy map. User specifically agrees not to misrepresent these data sets, nor to imply that changes they made were approved by Alaska Department of Natural Resources.", "Access Constraints: To ensure distribution of the most current public information, please refer requests for data or products to the Alaska Department of Natural Resources, Information Resource Management."]
bbox-east-long 180.000000
bbox-north-lat 76.786209
bbox-south-lat 42.509212
bbox-west-long -180.000000
contact-email dnr.gispub@alaska.gov
coupled-resource []
dataset-reference-date [{"type": "publication", "value": "1998-01-01"}]
frequency-of-update notPlanned
licence ["The State of Alaska makes no express or implied warranties (including warranties of merchantability\nand fitness) with respect to the character, function, or capabilities of the electronic services\nor products or their appropriateness for any users purposes. In no event will the State of Alaska\nbe liable for any incidental, indirect, special, consequential or other damages suffered by the\nuser or any other person or entity whether from the use of the electronic services or products,\nany failure thereof or otherwise, and in no event will the State of Alaska s liability to the\nrequestor or anyone else exceed the fee paid for the electronic service or product."]
metadata-date 2008-02-04
metadata-language eng; USA
metadata_type geospatial
old-spatial {"type": "Polygon", "coordinates": [[[-180.0, 42.509212], [180.0, 42.509212], [180.0, 76.786209], [-180.0, 76.786209], [-180.0, 42.509212]]]}
progress completed
resource-type dataset
responsible-party [{"name": "AK Department of Natural Resources - Information Resource Management", "roles": ["pointOfContact"]}]
spatial {"type": "Polygon", "coordinates": [[[-180.0, 42.509212], [180.0, 42.509212], [180.0, 76.786209], [-180.0, 76.786209], [-180.0, 42.509212]]]}
spatial_harvester true
Groups
  • AmeriGEOSS
  • National Provider
  • North America
Tags
  • alaska
  • amerigeo
  • amerigeoss
  • ckan
  • digital-line-graph
  • dlg
  • drainage
  • geo
  • geoss
  • hydrography
  • lakes
  • national
  • north-america
  • perennial
  • rivers
  • streams
  • united-states
  • usgs-dlg-lakes
  • usgs-dlg-streams
  • water-bodies
isopen False
metadata_created 2025-11-21T11:07:38.066448
metadata_modified 2025-11-21T11:07:38.066452
notes Statewide lakes were assembled from seventeen separate files in the USGS 1:2,000,000 Digital Line Graphs (DLG) dataset and include only those polygons with AREA greater than 20 acres (80940 square meters). Polygons with the attribute MIN = 100 or arcs with the attribute LINECODE = 'L' are valid lakes. For data codes and details, please refer to the US Geological Survey Circular 895, 1982. Due to the limitation of ARC/INFO software at the time of processing these files, the lakes were originally processed into three groups. Then a framework of arcs surrounding those three groups allowed all the lakes to be united into one statewide lakes coverage. Any lakes which were interested either by the boundaries of the seventeen original DLG files or by DNR's framwork were then edgematched and coded as one lake. Statewide rivers and streams were assembled from eighteen files in the USGS 1:2,000,000 Digital Line Graphs (DLG) dataset. Arc with the attributes MIN greater than 0 are valid rivers and streams. From this DLG rivers dataset, the "Major Rivers" dataset was generated. Please refer to this theme, if the eight major rivers of Alaska are what you need. During the detailed review of this layer in preparation for public access, it became apparent the USGS DLG rivers and streams for Alaska dataset is not complete. Several major watersheds in Southwest Alaska are missing. Specific known omissions were Wood River, Kvichak River, Ugashik River, Naknek River, and Egegik River. Subsequent versions of this layer will correct this omission. These rivers and other rivers are not missing from the USGS hydrography layer included in the Digital Chart of the World 1:1,000,000 hydrography database, which is available through Environmental Systems Research Institute.
num_resources 2
num_tags 20
title Alaska Hydrography, 1:2,000,000