Digital Data for Payette National Forest Mineral Resource Assessment

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Frequently anticipated questions:


What does this data set describe?

Title:
Digital Data for Payette National Forest Mineral Resource Assessment
Abstract:
This metadata describes a series of coverages that were developed by the authors as a result of reviewing all available data and drawing boundaries that they thought included areas that might contain selected deposit types. (The deposit types include both some from the Cox and Singer classification system and some descriptive types that have not been formally described.) The deposit types are:
coal (lignite),
hot springs gold-silver,
gold-silver mixed metal veins,
distal disseminated gold-silver,
antimony veins,
tungsten veins,
low-sulfide gold-quartz veins,
polymetallic layers and veins,
copper-silver polymetallic veins,
manganese layers and veins,
barite layers and veins,
porphyry copper-molybdenum,
copper skarn,
iron skarn,
disseminated copper-silver,
kuroko zinc-copper massive sulfide,
hot spring mercury,
gypsum and anhydrite,
tungsten skarn,
gold-bearing skarn,
disseminated antimony,
zinc-lead skarn, and
copper-gold mixed-metal veins
See USGS Open File Report 98-219A for full descriptions of deposit types. Some deposit types have boundaries for both favorable and permissive areas for the occurrence of that type, although most have only one.
The coverages that contain this information are called
pnfcoal,
pnfcummv,
pnfskncu,
pnfdiscu,
pnfsknfe,
pnfgyp,
pnfhsau,
pnfhshg,
pnflosau,
pnfmmvs,
pnfmnlv,
pnfplylv,
pnfplyvd, and
pnfporcu.
An item in each of these coverages called "CODE" relates to another coverage that contains locations (points) of mineral properties (pnfmines). That coverage contains a lookup table - pnfmines.dm - that describes the meaning of the data in the "CODE" items.
Several related polygon coverages are used to produce maps. These include: pnfbdy (boundary of Payette National Forest), pnfmdist (mining district boundaries), pnftandr (township grid for Forest), pnfsec (section grid), pnftic (15 minute tics), and pnfwild (wilderness boundaries). Three line coverages (pnfrivs - rivers, pnfroad - roads, and pnfsnake - Snake River) were also used. These coverages were obtained either from the Forest Service or U.S. Bureau of Mines (now closed).
  1. How might this data set be cited?
    Causey, J. Douglas, Frank, David G., and Knowles, Andrew, 1998, Digital Data for Payette National Forest Mineral Resource Assessment: U.S. Geological Survey Open-File Report 98-219A, U.S. Geological Survey, Spokane, WA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -115.4041557
    East_Bounding_Coordinate: -114.85395733
    North_Bounding_Coordinate: 45.41391765
    South_Bounding_Coordinate: 45.11274824
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1998
    Currentness_Reference:
    publication date; Initial lines were hand drawn with grease pencil on mylar overlay of geologic map of Forest in mid 1990's. These lines were digitized in Arc/Info and attributed. Some modifications of polygons and attributes were done in 1997 to produce the final coverages.
  5. What is the general form of this data set?
    Geospatial_Data_Presentation_Form: map
  6. How does the data set represent geographic features?
    1. How are geographic features stored in the data set?
      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • Point (2)
      • String (56)
      • GT-polygon composed of chains (3)
    2. What coordinate system is used to represent geographic features?
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 1.0
      Ordinates (y-coordinates) are specified to the nearest 1.0
      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.
  7. How does the data set describe geographic features?
    PNFHSAU.PAT
    Polygons of areas favorable for Hot Spring Gold mineral deposits
    CODE
    Code refers to lookup table that has name of deposit model. (Source: Descriptions in Open File Report)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Causey, J. Douglas
    • Frank, David G.
    • Knowles, Andrew
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    J. Douglas Causey
    U.S. Geological Survey, GEO-WRG-MRS
    W 904 Riverside Avenue
    Spokane, WA
    USA

    509-368-3116 (voice)
    509-368-3199 (FAX)
    dcausey@usgs.gov

Why was the data set created?

The polygons are to be used for estimating where a certain deposit type might be found. The polygons are based on the state of knowledge in the mid 1990's and should not be used for any purposes other than indicating where one type of mineralization might occur.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
  3. What similar or related data should the user be aware of?
    Bookstrom, Art R., Johnson, Bruce R., Cookro, Theresa M., Lund, Karen, Watts, Kenneth C., King, Harley D., Kleinkopf, Merlin D., Pitkin, J.A., Sanchez, J. David, and Causey, J. Douglas, 1998, Mineral Resource Assessment of the Payette National Forest, West-central Idaho: U.S. Geological Survey Open-File Report 98-219A, U.S. Geological Survey, Spokane, WA.

    Online Links:


How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?
  2. How accurate are the geographic locations?
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
  5. How consistent are the relationships among the observations, including topology?
    Polygon and chain-node topology present.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: None
Use_Constraints:
The base was 1:100,000. All lines are approximations at that scale. The data is estimated to be accurate to + - 0.5 cm map distance at the base scale. Acknowledgement of U.S. Geological Survey would be appreciated in products derived form these data.

Who wrote the metadata?

Dates:
Last modified: 14-Jun-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA
USA

703-648-6533 (voice)
703-648-6252 (FAX)
pschweitzer@usgs.gov
Metadata standard:
Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)

This page is <https://geo-nsdi.er.usgs.gov/metadata/open-file/98-219/a/depmod.faq.html>
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