Point coverage J498MBPT for Ano Nuevo to Santa Cruz, California - A Photographic Tour of the Coastline

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Frequently anticipated questions:


What does this data set describe?

Title:
Point coverage J498MBPT for Ano Nuevo to Santa Cruz, California - A Photographic Tour of the Coastline
Abstract:
This data set consists of the point locations from which digital photographs were collected by Henry Chezar, USGS, on November 4, 1998, on the R/V David Johnston, associated with a marine data collection activity referred to by the USGS/CMG Activity ID: J-4-98-MB
Supplemental_Information:
From 1995 to 1999 the United States Geological Survey conducted a multifaceted scientific study of the seafloor geology and geologic processes within the Monterey Bay National Marine Sanctuary. Included in this study and presented here is a digital photographic survey documenting the coastal morphology and stratigraphy between Point Año Nuevo and Santa Cruz, California, with precision-navigated overlapping images. Another part of the study is producing a digital database of seafloor geologic maps. A comparison of the newly acquired seafloor maps and coastline images provides a means of visualizing the transition from sea to land.
The more than 500 digital coastline images included on this CD-ROM are linked by interactive location maps. The HTML and image files are also accessible by standard browser and image software.
Locations were transcribed from global positioning system (GPS) data captured with each image. Where such data were missing or erroneous, an estimate (flagged in attribute table) was supplied. Arcinfo point coverage and attribute table were generated from the data.
  1. How might this data set be cited?
    Chezar, Henry, and Wong, Florence L., 20000501, Point coverage J498MBPT for Ano Nuevo to Santa Cruz, California - A Photographic Tour of the Coastline: U.S. Geological Survey Digital Data Series DDS-61, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

  2. What geographic area does the data set cover?
    West_Bounding_Coordinate: -122.32550606
    East_Bounding_Coordinate: -121.96114313
    North_Bounding_Coordinate: 37.11182936
    South_Bounding_Coordinate: 36.94299611
  3. What does it look like?
    http://pubs.usgs.gov/dds/dds-61/images/webindex.jpg (JPEG)
    The images are linked to a series of location maps. The hierarchy of links looks like this:
    Regional map (92 kb)
        Detailed map (window x)
            72 dpi image
                300 dpi image
    
    The regional map displays the 23 areas into which the photographic images were divided. Each number on the regional map is a link to a detailed map (for example, window 8) that includes a sequence of about 30 images with an overlap of 5 images, for example, windows 8 and 9 have 5 images in common. Each of the points on a detailed map is linked to a 72 dpi version of the image captured at that location. Along with each 72 dpi image another link will display the higher-resolution 300 dpi image.
  4. Does the data set describe conditions during a particular time period?
    Calendar_Date: 04-Nov-1998
    Currentness_Reference:
    ground condition
  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 Point data set. It contains the following vector data types (SDTS terminology):
      • Point (573)
    2. What coordinate system is used to represent geographic features?
      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 3.224549805355
      Ordinates (y-coordinates) are specified to the nearest 3.224549805355
      Planar coordinates are specified in Meters
      The horizontal datum used is North American Datum of 1983.
      The ellipsoid used is GRS1980.
      The semi-major axis of the ellipsoid used is 6378206.4.
      The flattening of the ellipsoid used is 1/294.98.
  7. How does the data set describe geographic features?
    Entity_and_Attribute_Overview:
    J498MBPT.PAT:
    COLUMN   ITEM NAME        WIDTH OUTPUT  TYPE N.DEC  ALTERNATE NAME
        1  AREA                   8    18     F      5
        9  PERIMETER              8    18     F      5
       17  J498MBPT#              4     5     B      -
       21  J498MBPT-ID            4     5     B      -
       25  LONGITUDE              8    11     F      6
       33  LATITUDE               8     9     F      6
       41  NAVTIME               14    14     C      -
       55  HR                     4     2     B      -
       59  MIN                    4     2     B      -
       63  SEC                    4     2     B      -
       67  ESTIMATE               4     1     B      -
       71  DUPL                   4     1     B      -
       75  MOVE                   4     1     B      -
       79  ELAPSE_SEC             4     5     B      -
       83  ODD                    2     1     B      -
    AREA, PERIMETER: value = 0 for point features
    J498MBPT#:       unique internal control number
    J498MBPT-ID:     sequence number of all photographs
    LONGITUDE:       longitude in decimal degrees from GPS readings or,
                     if ESTIMATE is nonzero, by interpolation
    LATITUDE:        latitude in decimal degrees from GPS readings or,
                     if ESTIMATE is nonzero, by interpolation
    NAVTIME:         time YYYYDDDHHMMSST year, julian day, hour, minute, seconds,
                        tenths of seconds
    HR, MIN, SEC:    hour, minute, and second of photograph by Pacific Standard Time
    ESTIMATE:        nonzero if location of point was interpolated
                     when GPS reading was unavailable
    DUPL:            = 1 duplicate image
    MOVE:            = 1 interpolated location relocated again
    ELAPSE_SEC:      elapsed time in seconds from start of survey
    ODD:             odd-numbered points flagged for labelling
    
    Entity_and_Attribute_Detail_Citation: none

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)
    • Henry Chezar
    • Florence L. Wong
  2. Who also contributed to the data set?
    The authors would like to thank Captain Gordon Smith of the R/V David Johnston, Mike Diggles, Susan Mayfield, Steve Eittreim and Roberto Anima for their contributions to the production of this publication.
  3. To whom should users address questions about the data?
    United States Geological Survey (USGS), Coastal and Marine Geology (CMG)
    Attn: Florence L. Wong
    Geologist, GIS Coordinator
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5327 (voice)
    (650) 329-5190 (FAX)
    fwong@usgs.gov

Why was the data set created?

These data are provided to accompany the publication of the photographic images on cdrom intended for science researchers, students from elementary through college, policy makers, and general public.

How was the data set created?

  1. From what previous works were the data drawn?
    none (source 1 of 1)
    United States Geological Survey (USGS), Coastal and Marine Geology (CMG), Florence L. Wong, Henry Chezar, 20000301, Point coverage J498MBPT for Ano Nuevo to Santa Cruz, California - A Photographic Tour of the Coastline: U.S. Geological Survey Digital Data Series USGS DDS-61, U.S. Geological Survey, Menlo Park, CA.

    Online Links:

    Type_of_Source_Media:
    The images were captured in Kodak compressed TIFF format. Each image, when uncompressed with Kodak software, has a file size of 4.5 Mb (megabytes). To fit all the images on one CD-ROM, each TIFF file was desampled and converted to a high-quality JPEG (xxx.jpg) image that is just under 1 Mb in size (300 dots per inch at 3 x 5 inch). A second set of images was desampled to about 30 to 50 kb (72 dots per inch at 4 x 5 inch) for more rapid viewing.
    Source_Contribution:
    More than 500 overlapping, high-resolution digital images
  2. How were the data generated, processed, and modified?
    Date: Nov-1998 (process 1 of 7)
    digital photographs with GPS readings captured by Hank Chezar
    Date: Mar-1999 (process 2 of 7)
    GPS readings transcribed from images to text file by Hank Chezar and Diana Collins coordinates interpolated where missing by Hank Chezar coordinates converted to Arcinfo point file by Florence Wong
    Date: Aug-1999 (process 3 of 7)
    images desampled to 72 dpi and 300 dpi files by Mike Diggles
    Date: Sep-1999 (process 4 of 7)
    maps and html pages constructed from point coverage by Florence Wong
    Date: 15-Sep-1999 (process 5 of 7)
    first draft of metadata created by Florence Wong using fgdcmeta.aml from ARC/INFO data set /we/florence/mont.eitt2/dirnav/j498mbpt
    Date: 17-Feb-2000 (process 6 of 7)
    metadata edited and compiled for formal metadata by Carolyn Degnan using mp 2.5.1
    Date: 22-Mar-2000 (process 7 of 7)
    Creation of original metadata record Person who carried out this activity:
    United States Geological Survey (USGS), Coastal and Marine Geology (CMG)
    Attn: Florence L. Wong
    Geologist, GIS Coordinator
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5327 (voice)
    (650) 329-5190 (FAX)
    fwong@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?
    Identified as best available version.
  2. How accurate are the geographic locations?
    Each photograph encompasses approximately 200 m of coastline-- varying with distance from shore--and overlaps between adjacent photographs are tens of meters. The photographs were taken with a 35-mm high-resolution digital camera connected to a portable global positioning system (GPS) receiver with a horizontal accuracy of less than 3 meters. For most of the images, GPS data (date, time of day, latitude, longitude, and altitude) are recorded in the upper left corner of each image. The GPS data are of the ship positions only and are best read on the higher-resolution (300 dpi) images.
  3. How accurate are the heights or depths?
    As all images were taken at sea level, the altitude data on each image should be ignored.
  4. Where are the gaps in the data? What is missing?
    Because of the rapid camera firing rates needed to acquire overlapping images, the GPS information would sometimes be missing, duplicated or erroneous because of inadequate satellite download time. In those situations, an interpolated position is inserted in the sequence log (photolog.txt).
  5. How consistent are the relationships among the observations, including topology?
    Point features present.
    The sea-level images of the coast were collected from aboard the research vessel RV David Johnston in November 1998. We started from Año Nuevo and motored southward to Santa Cruz at approximately 16 knots (30 km/hr) and acquired more than 500 overlapping, high-resolution digital images.

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?
Access_Constraints: Physical source materials are under controlled on-site access.
Use_Constraints:
Please recognize the U.S. Geological Survey (USGS) as the source of this information.
Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
This information is not intended for navigational purposes.
Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
The maps and images may be viewed directly with commonly available browser and image software. To use an image in another application, use the "Save image as" feature of your browser or go directly to the image files. The images and other files are arranged in folders or directories on this CD-ROM as follows:
Folder:      Description:
------------+--------------------------------------------------
[top level]  1_readme.txt: explanatory text file
             index.htm: this file
             ver_hist.txt: publication version history
------------+--------------------------------------------------
data         photolog.txt is a text list of the GPS data
             transcribed or interpolated from the photographic
             images. If the
             location was interpolated, the "estimate" field is
             non-zero.
             j498mbpt consists of the data from photolog.txt
             converted to an ArcInfo point coverage in UTM
             coordinates, which
             was used to construct all the maps in this
             presentation. The data are included as shapefiles
             (j498mbpt.dbf, j498mbpt.shx, j498mbpt.shp) and
             an ArcInfo export file (j498mbpt.e00).
             j498mbpt.met is this formal metadata file.
             windmnmx.txt lists the geographic windows of the
             regional and detailed index maps.
------------+--------------------------------------------------
html1        HTML files that include the regional map and
             detailed map pages
------------+--------------------------------------------------
html2        HTML files to display each image; 070xxx.htm
             displays 72 dpi images and 300xxx.htm displays
             300 dpi images
------------+--------------------------------------------------
images       images other than the photographs
------------+---------------------------------------------------
72dpi        573 photographs in JPEG format (0xxx.jpg) with a
             resolution of 72 dots per inch
------------+--------------------------------------------------
300dpi       573 photographs in JPEG format (0xxx.jpg) with a
             resolution of 300 dots per inch
Feel free to use the images but please cite this publication: Chezar, Henry, and Wong, Florence L., 2000, Año Nuevo to Santa Cruz, California - a photographic tour of the coastline: U.S. Geological Survey Digital Data Series DDS-61; 1 CD-ROM.
  1. Who distributes the data set? (Distributor 1 of 1)
    United States Geological Survey (USGS), Coastal and Marine Geology (CMG)
    Attn: Florence L. Wong
    Geologist, GIS Coordinator
    USGS, MailStop 999, 345 Middlefield Road
    Menlo Park, CA
    USA

    (650) 329-5327 (voice)
    (650) 329-5190 (FAX)
    fwong@usgs.gov
  2. What's the catalog number I need to order this data set? U.S. Geological Survey Digital Data Series DDS-61
  3. What legal disclaimers am I supposed to read?
    Please recognize the U.S. Geological Survey (USGS) as the source of this information.
    Although these data have been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data.
    The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials.
    This information is not intended for navigational purposes.
    Any use of trade, firm, or product 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: 10-Jun-2016
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/digital-data/61/metadata.faq.html>
Generated by mp version 2.9.48 on Tue Jul 03 20:04:42 2018