XYheat_flow

Frequently-anticipated questions:

• What does this data set describe?
  1. How should this data set be cited?
  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?
  5. What is the general form of this data set?
  6. How does the data set represent geographic features?
  7. How does the data set describe geographic features?
• Who produced the data set?
  1. Who are the originators of the data set?
  2. Who also contributed to the data set?
  3. To whom should users address questions about the data?
• Why was the data set created?
• How was the data set created?
  1. From what previous works were the data drawn?
  2. How were the data generated, processed, and modified?
• 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 data, including topology?
• How can someone get a copy of the data set?
  1. Are there legal restrictions on access or use of the data?
  2. Who distributes the data?
  3. What's the catalog number I need to order this data set?
  4. What legal disclaimers am I supposed to read?
  5. How can I download or order the data?
• Who wrote the metadata?

Title: XYheat_flow

Abstract:

This image shows the calculated heat flow values of the Southwest United States. Heat flow measures the energy transfer (flux) through the near surface of the lithosphere. Locally, heat flow is used for such things as imaging magma chambers, while globally it can be used to determine lithospheric thickness.

Heat flow is calculated using Fourier’s Law, which states that the flux (heat flow) is equal to the thermal conductivity multiplied by the thermal gradient.

Supplemental_Information:

The original data file was imported from a raw text file into Microsoft Excel. Column headers were added based on previous metadata and information listed at the top of the file. The file was then exported as a database IV (.dbf) file for easy import into the ArcGIS suite. ArcCatalog was used to convert the data into a shapefile and add projection information. The heat flow data was then used to create an Inverse-Distance-Weighted raster of the values.

1. How should this data set be cited?

   REQUIRED: The name of an organization or individual that developed the data set., REQUIRED: The date when the data set is published or otherwise made available for release., XYheat_flow.

   Online Links:

   • \\DUKE\C\Documents and Settings\jyoburn\Desktop\Geodatabase\heat\XYheat_flow.shp

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -180.925000

   East_Bounding_Coordinate: -48.366700

   North_Bounding_Coordinate: 77.000000

   South_Bounding_Coordinate: 16.396700

3. What does it look like?

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

   Calendar_Date: REQUIRED: The year (and optionally month, or month and day) for which the data set corresponds to the ground.

   Currentness_Reference:

   REQUIRED: The basis on which the time period of content information is determined.

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

   Geospatial_Data_Presentation_Form: vector digital data

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 (4690)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000001. Longitudes are given to the nearest 0.000001. Latitude and longitude values are specified in Decimal degrees.

      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 6378206.400000.
      The flattening of the ellipsoid used is 1/294.978698.
      

      Vertical_Coordinate_System_Definition:

      Altitude_System_Definition:

      Altitude_Resolution: 0.000016

      Altitude_Encoding_Method:

      Explicit elevation coordinate included with horizontal coordinates

7. How does the data set describe geographic features?

   XYheat_flow

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   SITE

   LOCATION

   LAT

   LAT_1

   N_S

   LAT__DEC_

   LONG

   LONG_1

   E_W

   LONG__DEC_

   CONDUCTIVI

   HEAD_PRODU

   HEAT_FLOW

   CORRECTED_

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • REQUIRED: The name of an organization or individual that developed the data set.

2. Who also contributed to the data set?

   Data taken from: "A New Global Heat Flow Compilation"; Assembled by Henry N. Pollack, Suzanne J. Hurter, and Jeffrey R. Johnson; Department of Geological Sciences, The University of Michigan. Ann Arbor, Michigan 48109-1063, U.S.A. March, 1991

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

   Jesse Yoburn
   Arizona State University
   

   jesse.yoburn@asu.edu
   

Part of the Geophysics aspect of the Geoinformatics Network project

1. From what previous works were the data drawn?

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

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

Access_Constraints:

REQUIRED: Restrictions and legal prerequisites for accessing the data set.

Use_Constraints:

REQUIRED: Restrictions and legal prerequisites for using the data set after access is granted.

1. Who distributes the data set?[Distributor contact information not provided.]

2. What's the catalog number I need to order this data set?

   Downloadable Data

3. What legal disclaimers am I supposed to read?

4. How can I download or order the data?
   • Availability in digital form:

     Data format:	Size: 0.922

   • Cost to order the data:

Dates:

Last modified: 09-Jun-2003

Metadata author:

REQUIRED: The organization responsible for the metadata information.
c/o REQUIRED: The person responsible for the metadata information.
REQUIRED: The city of the address., REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address.

REQUIRED: The telephone number by which individuals can speak to the organization or individual. (voice)

Metadata standard:

FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)

Metadata extensions used:

• <http://www.esri.com/metadata/esriprof80.html>