Online Files for Acid Deposition Sensitivity Map

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Frequently anticipated questions:

What does this data set describe?

Title: Online Files for Acid Deposition Sensitivity Map
The following digital product represents the Acid Deposition Sensitivity of the Southern Appalachian Assessment Area. Areas having various susceptibilities to acid deposition from air pollution are designated on a three tier ranking in the region of the Southern Appalachian Assessment (SAA). The assessment is being conducted by Federal agencies that are members of the Southern Appalachian Man and Biosphere (SAMAB) Cooperative. Sensitivities to acid deposition, ranked high, medium, and low are assigned on the basis of bedrock compositions and their associated soils, and their capacities to neutralize acid precipitation.
  1. How might this data set be cited?
    Southern Appalachian Man and Biosphere (SAMAB) Cooperative, 1995, Online Files for Acid Deposition Sensitivity Map: U.S. Geological Survey Open-File Report 95-810.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -86.501
    East_Bounding_Coordinate: -77.943
    North_Bounding_Coordinate: 39.5381
    South_Bounding_Coordinate: 33.093
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1995
    publcation date
  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.
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    acid deposition sensitivity (Source: OFR-95-0810)
    Rock unit lithology (Source: OFR-95-0810)
    ccCoarse-grained clastics: sandstones, conglomerates
    ccmMetamorphised coarse clastics
    fcFine-grained clastics: shales and mudstones
    fcmMetamorphosed fine-grained clastics: slates, schists, phyllites
    fpFelsic paragneiss and schist
    fvFelsic volcanics
    mpgMafic paragneiss and schist; amphibolite
    mvMafic volcanics
    umUltramafic rocks
    vuVolcanic and volcaniclastic rocks; undifferentiated
    acid deposition sensitivity (Source: OFR-95-0810)
    highHigh acid deposition sensitivity
    mediumMedium acid deposition sensitivity
    lowLow acid deposition sensitivity
    Acid deposition sensitivity at specific locations (same attributes as polygon coverage SAA-ACID.PAT) (Source: OFR-95-0810)
    map base information (Source: OFR-95-0810)
    Physiographic Province (Source: OFR-95-0810)
    1Appalachain Plateau Province
    2Valley and Ridge Province
    3Blue Ridge Province
    4Piedmont Province
    map base information (Source: OFR-95-0810)
    Boundary type (Source: OFR-95-0810)
    1DCW state boundary
    2Southern Appalachain Assessment Area boundary
    3Map border box
    4Legend box
    5Physiographic provinces
    Base map information at specific points (same attributes as polygon coverage SAA-ACID_BASE) (Source: OFR-95-0810)

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Southern Appalachian Man and Biosphere (SAMAB) Cooperative
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Peper, John D
    Mail Stop 926, USGS
    12201 Sunrise Valley Drive, MS 926A
    Reston, VA

    703-648-6332 (voice)

Why was the data set created?

To provide to the public online files for a acid deposition sensitivity of the Southern Appalachains.

How was the data set created?

  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
    Date: 1994 (process 1 of 2)
    SAA-ACID: Compiled from a digital map of the generalized geologic setting of the southern U.S. Appalachians (Peper and others, in preparation). This data source was compiled by J.D. Peper from a draft map at a scale of 1:1,000,000 from various federal, state, and academic geologic maps. SAA-ACID_BASE: (1) State boundary data was extracted from the Digital Chart of the World on CD-ROM (1994) in Vector Product Format (VPF) and converted to ARC/INFO using VPFIMPORT on a Sun workstation. This digital data product was produced by the Defense Mapping Agency to produce small scale mapping of global coverage (except Antarctica) based on the 1:1,000,000-scale Operational Navigation Charts (ONC series). (2) Southern Appalachian Assessment Area boundary was obtained from K.A. Hermann of the National Biological Service, Norris, TN (
    Date: 23-Mar-2010 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Jennifer Lenz
    US Geological Survey
    12201 Surise Valley Drive, Mail Stop 918
    Reston, VA

    703-648-6533 (voice)
    703-648-6560 (FAX)
  3. What similar or related data should the user be aware of?

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?
    Compiled from mapping done by authors and digital data from the Defense Mapping Agency.

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: none
  1. Who distributes the data set? (Distributor 1 of 1)
    USGS Information Services
    Box 25286, Denver Federal Center
    Denver, Colorado

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
  2. What's the catalog number I need to order this data set? US Geological Survey Open-File Report 95-0810
  3. What legal disclaimers am I supposed to read?
    This digital product, identified as open-file report 95-810, has been approved for release and publication by the Director of the USGS. Although this digital product has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the product pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
  4. How can I download or order the data?

Who wrote the metadata?

Last modified: 05-Feb-2016
Metadata author:
Peter N Schweitzer
USGS Midwest Area
Collection manager, USGS Geoscience Data Clearinghouse,
Mail Stop 954
12201 Sunrise Valley Dr
Reston, VA

703-648-6533 (voice)
703-648-6252 (FAX)
Metadata standard:
Content for Digital Geospatial Metadata (FGDC-STD-001-1998)

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