Geologic Data for the Phoenix South 30' x 60' Quadrangle

Metadata also available as

Frequently-anticipated questions:

What does this data set describe?

Title: Geologic Data for the Phoenix South 30' x 60' Quadrangle
Abstract:
Geologic data for the Phoenix South 30' x 60' Quadrangle at 1:100,000 scale.
Supplemental_Information:
The Geologic data for this series is contained in a geodatabase. See accompanying text "DMT04_NGMDB database structure.pdf" for further information.
  1. How should this data set be cited?

    Stephen J. Reynolds and Stephen Skotnicki (Original Compilation), Stephen M. Richard, Kraig Korroch and Ryan J. Clark (Digi, and Survey, Arizona Geological , 2007, Geologic Data for the Phoenix South 30' x 60' Quadrangle: Arizona Geological Survey Digital Information Series DI-05, Arizona Geological Survey, Tucson, Arizona.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -112
    East_Bounding_Coordinate: -113
    North_Bounding_Coordinate: 34
    South_Bounding_Coordinate: 33.5

  3. What does it look like?

    ../graphics/Browse Graphic (High Res).jpg (JPEG)
    High resolution (300 dpi)
    ../graphics/Browse Graphic (Low Res).jpg (JPEG)
    Low resolution (72 dpi)
    ../graphics/Browse Graphic (High Res).pdf (PDF)
    High resolution (300 dpi)

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2007
    Time_of_Day: unknown
    Currentness_Reference: publication date

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: NGMDB database

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

    2. What coordinate system is used to represent geographic features?

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 12
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -111.000000
      Latitude_of_Projection_Origin: 0.000000
      False_Easting: 500000.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000652
      Ordinates (y-coordinates) are specified to the nearest 0.000652
      Planar coordinates are specified in meters

      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is Geodetic Reference System 80.
      The semi-major axis of the ellipsoid used is 6378137.000000000000000000.
      The flattening of the ellipsoid used is 1/298.257222101000020000.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 0.000028
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    NGMDB development and implementation: Steve Richard, Jon Craigue and Dave Soller

  3. To whom should users address questions about the data?

    Arizona Geological Survey
    c/o Stephen Richard
    Geologist, GIS Manager
    416 W. Congress St., Suite 100
    Tucson, Arizona 85701
    USA

    (520) 770-3500 (voice)
    (520) 770-3505 (FAX)
    <http://www.azgs.az.gov>

Why was the data set created?

This data set was developed as part of the Arizona Geological Survey's ongoing efforts to provide geologic information in a digital format. The data can be used for analytical statistical purposes, planning and land management as well as for producing cartographic maps.

How was the data set created?

  1. From what previous works were the data drawn?

    Reynolds and Skotnicki, 1993 (source 1 of 2)
    Stephen J. Reynolds and Stephen Skotnicki, 1993, Geologic Map of the Phoenix South 30' x 60' Quadrangle, Central Arizona: Arizona Geological Survey Open-File Report OFR 93-18, Arizona Geological Survey, Tucson, AZ.

    Type_of_Source_Media: Mylar Map
    Source_Scale_Denominator: 100,000

    Skotnicki, 1994 (source 2 of 2)
    Skotnicki, Steven J., 1994, Compilation Geologic Map of the Central Gila Bend Mountains, Maricopa County, Arizona: Arizona Geological Survey Open-File Report OFR 94-18, Arizona Geological Survey, Tucson, AZ.

    Type_of_Source_Media: paper
    Source_Scale_Denominator: 100,000

  2. How were the data generated, processed, and modified?

    Date: 1998 (process 1 of 3)
    The source of the linework for the digitial coverages is the mylar original compiled for the 1:100000-scale geological map of AZGS OFR 93-18. Registration is explained in 2.4.1.1 (Horizontal Position Accuracy Report). The map was digitized using PC Arc/Info 3.4.2 and a Calcomp Drawingboard II table digitizer. Arcs were digitized in the Arcedit module using stream mode with the weed tolerance set at 5.08 meters. All arcs were later smoothed with the Arcedit spline command with the grain tolerance set at 40 meters. Any processing of the coverages using the Arc clean command had dangle and fuzzy tolerances of 2 meters. Transparencies of the digitized arcs were overlayed with the original, mylar source maps for proofing. After the linework was completed and proofed, the geology and lines coverages were generalized with a 5 meter weed tolerance to reduce the number of vertices in the straighter arcs.

    Data sources used in this process:

    • Reynolds and Skotnicki, 1993

    Date: Unknown (process 2 of 3)
    Coverages imported into standard NGMDB-format geodatabase. Quaternary units updated to current lexicon.

    Date: Unknown (process 3 of 3)
    Geology lines and polygons updated to reflect new mapping in the Gila Bend Mountains. Digitized by unknown author.

    Data sources used in this process:

    • Skotnicki, 1994

  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?

    FeatureClass attributes reflect the properties of the linework and polygons on the paper map. Errors on the published maps were corrected by reference to the original source materials used to compile the published map.

  2. How accurate are the geographic locations?

    The positional accuracy of features in the database have not been tested against anything other than the mylar source map from which they were digitized.

  3. How accurate are the heights or depths?

    Data set does not contain vertical information.

  4. Where are the gaps in the data? What is missing?

  5. How consistent are the relationships among the observations, including topology?

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

Access_Constraints:
Although these data have been processed successfully on a computer system at the Arizona Geological Survey, no warranty expresses or implied is made regarding the accuracy or utility of the data on any system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly aquired from the Arizona Geological Survey, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Arizona Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.
Use_Constraints:
The Arizona Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.

  1. Who distributes the data set? (Distributor 1 of 1)

    Arizona Geological Survey
    c/o Stephen Richard
    Geologist, GIS Manager
    416 W. Congress St., Suite 100
    Tucson, Arizona 85701
    Pima

    (520) 770-3500 (voice)
    (520) 770-3505 (FAX)
    <http://www.azgs.az.gov>

    Hours_of_Service: 8:00 a.m. to 5:00 p.m. Monday through Friday
    Contact_Instructions: Call, fax or e-mail the Arizona Geological Survey to order.
  2. What's the catalog number I need to order this data set?

  3. What legal disclaimers am I supposed to read?

    Although these data have been processed successfully on a computer system at the Arizona Geological Survey, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that these data are directly acquired from the Arizona Geological Survey, and not indirectly through other sources which may have changed the data in some way. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Arizona Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein.

  4. How can I download or order the data?

  5. Is there some other way to get the data?

    See <http://www.azgs.az.gov/order_info.htm>

Who wrote the metadata?

Dates:
Last modified: 20-Sep-2007
Metadata author:
Arizona Geological Survey
c/o Stephen Richard
Geologist, GIS Manager
416 W. Congress St., Suite 100
Tucson, Arizona 85701
Pima

(520) 770-3500 (voice)
(520) 770-3505 (FAX)
<http://www.azgs.az.gov>

Hours_of_Service: 8:00 a.m. to 5:00 p.m. Monday through Friday
Contact_Instructions: Call, fax or e-mail the Arizona Geological Survey to order.
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.8.6 on Wed Oct 17 15:35:32 2007