USGS Geoscience Data Catalog
Additional USGS Geoscience data can be found by geographic location or by publication series.
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Planar coordinates are encoded using coordinate pair
Abscissae (x-coordinates) are specified to the nearest not determined
Ordinates (y-coordinates) are specified to the nearest not determined
Planar coordinates are specified in METERS
The horizontal datum used is North American Datum of 1927.
The ellipsoid used is Clarke 1866.
The semi-major axis of the ellipsoid used is 6378206.4.
The flattening of the ellipsoid used is 1/294.98.
Arthur A. Bookstrom and Stephen E. Box mapped the surficial geology and wetland system units (1996-1998); Berne L. Jackson (Coeur d'Alene Tribe) scanned the original stable-base 1:24,000-scale maps and created and attributed the GIS with preliminary labels and linecodes. Theodore R. Brandt (contractor) created the master Arc/Info registration file and converted the preliminary GIS to Idaho state plane format. He also digitized in new linework, edited the digital files, and built lookup tables with detailed wetland system, geologic, lithologic, and metal contamination information; Pamela D. Derkey (USGS) provided technical assistance with the geologic-wetland systems data model, metadata, digital documentation, and map projections; Steven R. Munts (contractor) assisted with digital editing; Julie Campbell (USFW) reviewed marsh and lacustrine systems for correctness. She also reviewed vegetation classes and subclasses.
The purpose of these GIS datasets is to show how the distribution of floodborne contaminated sediments is related to potential sources of clean and contaminated sediments, and to hydrologic features that determine patterns of erosion, transport, and deposition. Mapped geologic information indicates the configuration and distribution of surficial geomorphic features and sedimentary deposits that result from erosion, transport, and deposition of unconsolidated sediments. Mapped wetland features indicate the configuration and distribution of surficial hydrologic pathways that guide erosion, transport, and deposition. These GIS datasets are intended to aid in process- oriented interpretation of geochemical and biological data being collected as a basis for natural-resource damage assessment and restoration planning.
Person who carried out this activity:
Attribute accuracy was verified by manual comparison of the source with hard copy printouts and plots.
The horizontal positional accuracy for the digital data in no
better than +/- 2 meters based on the digitizing RMS error.
Data is principally from geologic interpretation of color aerial
photographs and LANDSAT TM images with field checking by A.A. Booksrom
and S.E. Box.
Some bedrock geologic information is from Griggs (1973). In general,
the minimum mapping unit is approximately 50 square meters.
Polygon and chain-node topology present. Segments making up the outer and inner boundaries of a polygon tie end-to-end to completely enclose the area. Line segments are a set of sequentially numbered coordinate pairs. No duplicate features exist nor duplicate points in a data string. Intersecting lines are separated into individual line segments at the point of intersection. Point data are represented by two sets of coordinate pairs, each with the same coordinate values. All nodes are represented by a single coordinate pair which indicates the beginning or end of a line segment.
Are there legal restrictions on access or use of the data?
- Access_Constraints: None
- This digital database is not meant to be used or displayed at any scale larger than 1:24,000 (e.g., 1:12,000)
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 the USGS.
The U.S. Geological Survey (USGS) provides these geographic data "as is." USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of the USGS, no warranty, expressed or implied, is made by USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty.
In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support by USGS.
|Data format:||Surficial geologic units and related environmental features in format ARCE (version 7.x) Size: 9.7|
|Data format:||Surficial geologic units and related environmental features in format Shapefile (version 1.0) Size: 9.7|