Contoured Bathymetry for Lake Pontchartrain, Louisiana

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: Contoured Bathymetry for Lake Pontchartrain, Louisiana

Abstract:

This is the contoured bathymetry for Lake Pontchartrain created for USGS Professional Paper 1634 by Laura Hayes using Vertical Mapper.

Supplemental_Information:

This data layer was obtained from USGS Professional Paper 1634 (2002) with no associated metadata. Metadata has been created for use of the data layer in this publication.

1. How should this data set be cited?

   U.S. Geological Survey, Hayes, Laura, and Reid, Jamey, 2002, Contoured Bathymetry for Lake Pontchartrain, Louisiana: Digital Data Series.

   Online Links:

   • <https://pubs.usgs.gov/dds/dds79>

   This is part of the following larger work.

   Williams, S.J., Laura Hayes, editor, Reid, J.M., Cross, V., and Polloni, C., 2002, Coastal Erosion and Wetland Change in Louisiana: Selected USGS Products: Digital Data Series, U.S. Geological Survey, Coastal and Marine Geology Program, Woods Hole Field Center, Woods Hole, MA.

2. What geographic area does the data set cover?

   West_Bounding_Coordinate: -90.430200

   East_Bounding_Coordinate: -89.734154

   North_Bounding_Coordinate: 30.387504

   South_Bounding_Coordinate: 30.020650

3. What does it look like?

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

   Calendar_Date: 2002

   Currentness_Reference: publication date

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):

      • String (626)

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

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitude and longitude values are specified in Decimal degrees.

      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 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.
      

7. How does the data set describe geographic features?

   pontcont

   FID

   Internal feature number. (Source: ESRI)

   Sequential unique whole numbers that are automatically generated.

   Shape

   Feature geometry. (Source: ESRI)

   Coordinates defining the features.

   PONTCONT_I

   DEPTH_M

   Depth, meters

   DEPTH_FT

   Depth, feet

1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
   • U.S. Geological Survey
   • Laura Hayes
   • Jamey Reid

2. Who also contributed to the data set?

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

   Jamey M. Reid
   U.S. Geological Survey
   IT Specialist (Data Management)
   

   508-548-8700 x2204 (voice)
   508-457-2310 (FAX)
   jreid@usgs.gov
   

This data set was created in order to serve as part of the background map layers for data visualization in the sediment database section of USGS Professional Paper 1634.

1. From what previous works were the data drawn?

   NOAA Navigation Chart 11369 (source 1 of 1)

   Type_of_Source_Media: chart

   Source_Contribution: Sounding values in meters and feet

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

   (process 1 of 6)

   Lake Maurepas bathymetry (soundings in meters and feet) was digitized using NOAA navigation chart 11369.

   Person who carried out this activity:
   

   U.S. Geological Survey
   c/o Laura Hayes
   Cartographer
   Woods Hole Field Center
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 (voice)
   508-457-2310 (FAX)
   lhayes@usgs.gov
   

   Contact_Instructions:

   This work was completed while at the USGS, Woods Hole Field Center. Laura is now at USGS, Water Resources Division in Pembroke, New Hampshire.

   Data sources used in this process:

   • NOAA navigation chart 11369

   Data sources produced in this process:

   • pontbath.tab

   (process 2 of 6)

   Maurepas bathymetry was contoured using Vertical Mapper.

   Person who carried out this activity:
   

   Laura Hayes
   U.S. Geological Survey
   Cartographer
   Woods Hole Field Center
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 (voice)
   508-457-2310 (FAX)
   lhayes@usgs.gov
   

   Contact_Instructions:

   This work was completed while at the USGS, Woods Hole Field Center. Laura is now at USGS, Water Resources Division in Pembroke, New Hampshire.

   Data sources used in this process:

   • pontbath.tab

   Data sources produced in this process:

   • pontcont.tab

   (process 3 of 6)

   This file was generated as a .tab file in MapInfo and then exported to MapInfo Interchange Format (.mif and .mid).

   Person who carried out this activity:
   

   Contact_Instructions:

   This work was completed while at the USGS, Woods Hole Field Center. Laura is now at USGS, Water Resources Division in Pembroke, New Hampshire.

   Data sources used in this process:

   • pontcont.tab

   Data sources produced in this process:

   • pontcont.mif
   • pontcont.mid

   (process 4 of 6)

   The MapInfo Interchange Format (.mif and .mid) file was converted to an ArcView shapefile (.shp).

   Person who carried out this activity:
   

   U.S. Geological Survey
   c/o Laura Hayes
   Cartographer
   Woods Hole Field Center
   Woods Hole, MA 02543-1598
   USA
   

   508-548-8700 (voice)
   508-457-2310 (FAX)
   lhayes@usgs.gov
   

   Contact_Instructions:

   This work was completed while at the USGS, Woods Hole Field Center. Laura is now at USGS, Water Resources Division in Pembroke, New Hampshire.

   Data sources used in this process:

   • pontcont.mif
   • pontcont.mid

   Data sources produced in this process:

   • pontcont.shp
   • pontcont.shx
   • pontcont.dbf

   (process 5 of 6)

   Metadata for this data layer was written.

   Person who carried out this activity:
   

   Jamey M. Reid
   U.S. Geological Survey
   IT Specialist (Data Management)
   Woods Hole Field Center
   Woods Hole, MA 02543-1598
   USA
   

   548-548-8700 x2204 (voice)
   508-457-2310 (FAX)
   jreid@usgs.gov
   

   Data sources used in this process:

   • pontcont.shp

   Data sources produced in this process:

   • pontcont.txt
   • pontcont.html
   • pontcont_faq.html

   (process 6 of 6)

   Metadata imported.

   Data sources used in this process:

   • K:\LA_COVERS\Bathymetry\MAURCONT.shp.xml

   Data sources produced in this process:

   • pontcont.html
   • pontcont.txt
   • pontcont_faq.html

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?

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

Access_Constraints: None

Use_Constraints:

The U.S. Geological Survey must be referenced as the orignators of the dataset in any future products derived from these data.

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: 0.528

   • Cost to order the data:

Dates:

Last modified: 22-Jul-2003

Metadata author:

U.S. Geological Survey
c/o Jamey M. Reid
IT Specialist (Data Management)
USGS, Woods Hole Field Center
Woods Hole, MA 02543-1598
USA

508-548-8700 x2204 (voice)
508-457-2310 (FAX)
jreid@usgs.gov

Metadata standard:

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

Metadata extensions used:

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