Fifteen 1 degree X 2 degree Digital Geologic Maps of the Altiplano and Cordillera Occidental, Bolivia

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Frequently anticipated questions:

What does this data set describe?

Title:
Fifteen 1 degree X 2 degree Digital Geologic Maps of the Altiplano and Cordillera Occidental, Bolivia
Abstract:
The 1 degree X 2 degree geologic maps of the Altiplano/Cordillera Occidental were produced from fifteen, 1:250,000 scale, field compilation maps: 
1. Copacabana
2. La Paz
3. Charana
4. Corocoro
5. Cochabamba
6. Corque
7. Uncia
8. Salinas de Garci Mendoza
9. Rio Mulato
10. Villa Martin
11. Uyuni
12. Volcan Ollague
13. San Pablo de Lapez
14. Volcan Juriques
15. Cerro Zapaleri
  1. How might this data set be cited?
    Marsh, Sherman P., Richter, Donald H., Ludington, Steve, Soria-Escalante, Eduardo, and Escobar-Diaz, Angel, 1997, Fifteen 1 degree X 2 degree Digital Geologic Maps of the Altiplano and Cordillera Occidental, Bolivia: U.S. Geological Survey Open-File Report 97-174.

    Online Links:

  2. What geographic area does the data set cover?
  3. What does it look like?
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 1997
    Currentness_Reference:
    publication 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. It contains the following vector data types (SDTS terminology):
      • Entity point
      • Complete chain
      • GT-polygon composed of chains
    2. What coordinate system is used to represent geographic features?
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    All attribute values are numerical and no key is provided to define these values.
    Entity_and_Attribute_Detail_Citation: USGS Bulletin 1975

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Sherman P. Marsh
    • Donald H. Richter
    • Steve Ludington
    • Eduardo Soria-Escalante
    • Angel Escobar-Diaz
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
    Sherman P. Marsh
    US Geological Survey PO Box 25046, MS 973 Denver Federal Center
    Denver, Colorado
    US

    303-236-5521 (voice)
    303-236-3200 (FAX)
    smarsh@helios.cr.usgs.gov

Why was the data set created?

To provide to the public a digital geologic map database Altiplano/Cordillera Occidental area of Bolivia.

How was the data set created?

  1. From what previous works were the data drawn?
    Bulletin 1975, plate 1 (source 1 of 1)
    Marsh, Sherman P., Richter, Domald H., Ludington, Steve, Soria-Escalante, Eduardo, and Escobar-Diaz, Angel, 1992, Geologic map of the Altiplano and Cordillera Occidental, Bolivia: U.S. Geological Survey Bulletin 1975, U.S. Geological Survey, Denver, CO.

    Other_Citation_Details: Plate 1 is the map referred to here
    This is part of the following larger work.

    U.S. Geological Survey, and Servicio Geologico de Bolivia, 1992, Geology and Mineral Resources of the Altiplano and Cordillera Occidental, Bolivia: U.S. Geological Survey Bulletin 1975, U.S. Geological Survey, Denver, CO.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 500000
    Source_Contribution: These data were printed as plate 1 of this publication.
  2. How were the data generated, processed, and modified?
    Date: Unknown (process 1 of 2)
    After examination of the field maps it was determined that the best method for capturing the geologic data digitally was by means of an optic scanner. Because of the condition of the paper maps and the fact that they had been hand colored, the geology was transferred to stable-base mylar overlays at the 1:250,000 scale using a fine (0.35 mm) ink pen prior to scanning. The overlays were then scanned into ARC/INFO using a Tectronics 4991 digital drum scanner. The 15 scanned images were converted into ARC/INFO coverages and edited in ARCEDIT using all 137 geologic units derived from the original field compilation maps.
    Date: 09-Aug-2000 (process 2 of 2)
    Creation of original metadata record Person who carried out this activity:
    Jennifer Lenz
    U.S. Geological Survey
    12201 Surise Valley Drive, Mail Stop 918
    Reston, VA
    USA

    703-648-6974 (voice)
    703-648-6560 (FAX)
    pschweitzer@usgs.gov
  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?
    No attempt has been made to field check the geologic information nor has any attempt been made to resolve any geologic discrepancies at the borders of the maps. Any related ARC/INFO files for each of the 15 maps are included in the ARC/INFO export files.
  3. How accurate are the heights or depths?
  4. Where are the gaps in the data? What is missing?
    Complete
  5. How consistent are the relationships among the observations, including topology?
    The 1 degree X 2 degree geologic maps of the Altiplano/Cordillera Occidental were produced from fifteen, 1:250,000 scale, field compilation maps. These paper maps were made by Servicio Geologico de Bolivia (GEOBOL) geologists in the 1980's.

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
    USA

    1-888-ASK-USGS (voice)
    1-303-202-4695 (FAX)
    infoservices@usgs.gov
  2. What's the catalog number I need to order this data set? U.S. Geological Survey Open-File Report 97-174
  3. What legal disclaimers am I supposed to read?
    This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 23-Feb-2015
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/97-174/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:06:46 2018