Filters: Tags: water bodies (X) > Types: Downloadable (X)
3 results (41ms)|
Filters
Date Range
Tag Types |
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...
State of Utah's assessed lakes coverage (converted to 30m raster coverage) based on data created for the draft 2014 Integrated Report from Utah Division of Water Quality (DWQ) Feb, 2015. The Utah lakes depicted here were sampled in order to determine whether each water body should be categorized as impaired (under the 2014 draft report guidelines) based on EPA designations. These GIS data can be used to identify potentially impaired waters, based on statewide Assessment Unit (AU) polygons for Utah (USGS 5th and 6th hydrologic unit boundaries as developed by USGS in Salt Lake City, call Karen Hansen, 801-908-5038 for more info.)
Selected major rivers were extracted from all rivers and streams in the USGS 1:2,000,000 Digital Line Graphs (DLG) dataset. The major rivers include the Copper, Susitna, Kuskokwim, Yukon, Koyukuk, Kobuk, Noatak, and Colville Rivers. Set these rivers to the hierarchy attribute to "1". To access the complete statewide DLG dataset, refer to the "Rivers, 1:2,000,000" metadata. New to this coverage is a second hierarchical level of streams. These streams were pulled from the 1995 navigability coverage. This coverage, however, does not represent which streams are considered navigable by the state. The second hierarchy was added for cartographic purposes only - to provide a more complete river drainage layer on statewide...
|
|
