Fact Sheet: _ Lake Tahoe, Nevada, USA

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DESCRIPTION

The Lake Tahoe basin was formed between 2 and 3 million years ago. Thousands of years ago there was an avalanche, the remnants of which we can be seen in the left-hand graphic image shown below, where boulders are strewn across the lake floor.

The Lake Tahoe STF source data represents a 10-meter digital elevation model (DEM) over a 32 km by 83 km area.

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Recognizing the unique nature of Lake Tahoe, President Clinton issued an executive order in July 1997 to establish a formal interagency partnership for management of Federal activities with the Lake Tahoe Basin and development of a linked natural-resources database and a Geographic Information System (GIS).

The source data for this project was downloaded from the resulting Lake Tahoe Clearinghouse. A unique 10 meter terrain/bathymetric surface has been generated integrating data from:

Feature data have been assembled from 1:24,000 source Digital Line Graphics. Digital Orthophoto Mosaic has been assembled from 72 Digital Orthophoto Quads (DOQ) -- approximately 3 GB uncompressed.

Both gridded and polygonal data sets are provided in the download.

DATA CONTENT

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Gridded Data

AUTM Database Extents:

DRM Classes Used:

  • Absolute Time
  • Absolute Time Interval
  • Areal Feature
  • Citation
  • Classification Data
  • Classification Related Features
  • Data Quality
  • Edge Direction
  • Environment Root
  • Environmental Domain Summary
  • Face Direction
  • Feature Edge
  • Feature Face
  • Feature Face Ring
  • Feature Node
  • Identification
  • Keywords
  • Legal Constraints
  • Lineage
  • Linear Feature
  • Perimeter Data
  • Perimeter Related Feature Topology
  • Process Step
  • Property Grid
  • Property Grid Hook Point
  • Regular Axis
  • Responsible Party
  • Role Data
  • Security Constraints
  • Spatial Extent
  • Table Property Description
  • TM Augmented 3D Location
  • Transmittal Root
  • Transmittal Summary
  • Union Of Feature Topology
  • Union Of Features
  • Union Of Geometry Hierarchy

EDCS Classification Codes Present:

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Polygonal Data

Polygons: 2034846

Area: 2656 km2

AUTM Database Extents:

DRM Classes Used:

  • Absolute Time
  • Absolute Time Interval
  • Ambient Colour
  • Areal Feature
  • Citation
  • Classification Data
  • Classification Related Features
  • Classification Related Geometry
  • Colour Shininess
  • Data Quality
  • Diffuse Colour
  • EDCS Use Summary Item
  • Edge Direction
  • Emissive Colour
  • Environment Root
  • Environmental Domain Summary
  • Face Direction
  • Feature Edge
  • Feature Face
  • Feature Face Ring
  • Feature Node
  • Identification
  • Image
  • Image Library
  • Image Mapping Function
  • Inline Colour
  • Keywords
  • Legal Constraints
  • Lineage
  • Linear Feature
  • Perimeter Data
    •
  • Perimeter Related Feature Topology
  • Polygon
  • Presentation Domain
  • Primitive Colour
  • Process Step
  • Property Set
  • Property Set Index
  • Property Set Table
  • Property Set Table Group
  • Property Set Table Library
    •
  • Property Value
  • Reference Vector
  • Rendering Properties
  • Responsible Party
  • RGB Colour
  • Role Data
  • Security Constraints
  • Spatial Extent
  • Spatial Index Data
  • Spatial Index Related Geometry
  • Specular Colour
  • Texture Coordinate
  • TM Augmented 3D Location
  • Translucency
  • Transmittal Root
  • Transmittal Summary
  • Union Of Feature Topology
  • Union Of Features
  • Union Of Geometry Hierarchy
  • Union Of Primitive Geometry
  • Vertex

EDCS Classification Codes Present:

COMPATIBILITY INFORMATION

This data set is compliant with SEDRIS 4.1.x.

POINT OF CONTACT

Send email to help@sedris.org for questions or assistance in using this data set.

As a minimum, please provide the following in your email:

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Last updated: _ April 15, 2008