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USGS:Biology arrow icon Biological Informatics Program arrow icon Vegetation Characterization Program arrow icon Lyndon B. Johnson National Historical Park arrow icon Authorized Boundary FAQ Metadata

Authorized Boundary FAQ Metadata

Frequently-anticipated questions:

What does this data set describe?

Title: Lyndon B. Johnson National Historical Park Vegetation Mapping Project - Park Boundary
Abstract:
This is a vector polygon file showing the NPS authorized boundary Lyndon B. Johnson National Historical Park. The coordinates for this dataset were collected using a Trimble GeoExplorer 3.
Supplemental_Information:
LBJ NHP was authorized on December 2, 1969 and was redesignated from a Historic Site to a National Historical Park on December 28, 1980. Present holdings are approximately 1,570 acres, 674 of which are federal. The Johnson family generously continues to add to this property; their most recent donation of acreage was in April, 1995.
  1. How should this data set be cited?

    National Park Service, Lyndon B. Johnson National Historical Park, Division of Resources Management and Visitior Protection, Unpublished Material, lyjo_bndry1.

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -98.644702
    East_Bounding_Coordinate: -98.409127
    North_Bounding_Coordinate: 30.277434
    South_Bounding_Coordinate: 30.234428
    Description_of_Geographic_Extent: Lyndon B. Johnson National Historical Park

  3. What does it look like?

    LYJO_Park.jpg (JPEG)
    A graphic display of the park's legislative boundary.

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

    Calendar_Date: 02-Jul-2002
    Currentness_Reference: ground condition

  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):

      • G-polygon (11)

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

      Grid_Coordinate_System_Name: Universal Transverse Mercator
      Universal_Transverse_Mercator:
      UTM_Zone_Number: 14
      Transverse_Mercator:
      Scale_Factor_at_Central_Meridian: 0.999600
      Longitude_of_Central_Meridian: -99.000000
      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 0.000032
      Ordinates (y-coordinates) are specified to the nearest 0.000032
      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 6378137.000000.
      The flattening of the ellipsoid used is 1/298.257222.

  7. How does the data set describe geographic features?

    lyjo_bndry1
    Shapefile Attribute Table (Source: ESRI)

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    AREA
    Area of the polygon in square meters (Source: Originator)

    Range of values
    Minimum:8327.086
    Maximum:6237364
    Units:unknown

    PERIMETER
    software computed value (Source: Originator)

    Range of values
    Minimum:367.037
    Maximum:18223.27
    Units:unknown

    PARKPOLC_
    Unknown (Source: NPS)

    Unknown.

    PARKPOLC_I
    Unknown (Source: NPS)

    Unknown.

    ID
    Park Acronym Name. (Source: National Park Service)

    LYJO.

    NAME
    Park Full Name. (Source: National Park Service)

    Lyndon B. Johnson NHP.

    NAME2
    String (Source: NPS)

    Information about the source, scale, and date of the boundary.

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    ACRES
    Area of the polygon in acres (Source: Originator)

    Range of values
    Minimum:2.058
    Maximum:1541.286
    Units:unknown

    PERIM_MILE
    Perimeter in miles (Source: Originator)

    Range of values
    Minimum:0.228
    Maximum:11.323
    Units:unknown

    Entity_and_Attribute_Overview:
    The first 3 items in the attribute table are the default attribute information found in the ArcView shapefile format. The fourth item, comment, was a user-defined attribute from the GPS's datalogger data dictionary user input. The remaining items had Pathfinder software produced values: PDOP_MAX, CORR_TYPE, RCVR_TYPE, GPS_DATE, GPS_TIME, DATAFILE, UNFILT_POS, FILT_POS, UPDATE_STA, STD_DEV, GPS_HEIGHT, HORZ_PREC, VERT_PREC.
    Entity_and_Attribute_Detail_Citation:
    The user-defined items and values are decribed in detail above.Contact ESRI (Environmental Systems Research Institute, Inc.) for detailed explanations of their internal file structure at "<http://www.esri.com">. Contact Trimble at <http://www.trimble.com>" for a more detailed explanation of generated attributes that can be exported for feature type.

Who produced the data set?

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

    • National Park Service, Lyndon B. Johnson National Historical Park, Division of Resources Management and Visitior Protection

  2. Who also contributed to the data set?

    National Park Service, Lyndon B. Johnson National Historical Park, Division of Resources Management and Visitor Protection

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

    National Park Service, Lyndon B. Johnson National Historical Park, Division of Resource Management and Visitor Protection
    c/o Jason Lott
    Integrated Resources Program Manager
    P.O. Box 329
    Johnson City, TX 78636
    United States

    830-868-7128 x236 (voice)
    830-868-7863 (FAX)
    Jason_Lott@nps.gov

    Hours_of_Service: 8-5pm cst
    Contact_Instructions: none

Why was the data set created?

To show the NPS authorized boundary at Lyndon B. Johnson National Historical Park. The intended use of all data in the park's GIS library is to support diverse park activities including planning, management, maintenance, research, and interpretation.

How was the data set created?

  1. From what previous works were the data drawn?

    DOQQ (source 1 of 2)
    Program, Texas Orthoimagery , 1995, DOQQ: 7.5-Minute Series Cave Creek School, Hye, Stonewall, Rocky Creek Quadrangle, Texas Orthoimagery Program, Austin, TX.

    Type_of_Source_Media: digital othophoto quarter quadrant
    Source_Scale_Denominator: 24000
    Source_Contribution: Provided an image of area features for comparison to GPS data.

    GPS data (source 2 of 2)
    National Park Service, <PARK NAME>, <PARK DIVISION>, Unpublished Material, Global Positioning System (GPS) data.

    Type_of_Source_Media: digital data file
    Source_Scale_Denominator: 2
    Source_Contribution: Provided coordinates for features

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

    Date: 12-Jul-2002 (process 1 of 13)
    The LBJ NHP Ranch, water tanks theme was included in the data dictionary attribute menu for use in the GPS data logger. GPS based coordinates were collected at Lyndon B. Johnson NHP during July of 2002 using Trimble GeoExplorer3 receiver in datum NAD83, UTM - zone 14. A maximum Position Dilution of Precision (PDOP) of 6 was maintained for each set while tracking a minimum of 4 satellite vehicles.

    Data sources used in this process:

    • GPS data

    Date: 09-Jul-2002 (process 2 of 13)
    The GPS processing software was Trimble Pathfinder Office Version 2.70. GPS files were differentially corrected using Trimble Community Base Station data from the Texas Department of Transportation, Austin site. The corrected GPS files were edited for known deviant and duplicate data. The Pathfinder Office Combine utility was used to merge features collected with identical data dictionaries by different GPS collection teams throughout the 2 day collection period. The combined features were then exported into ESRI ArcView version 3.2 shapefile format.

    Data sources used in this process:

    • GPS data

    Data sources produced in this process:

    • GPS data

    Date: 09-Jul-2002 (process 3 of 13)
    Feature data was compared to features in the digital raster graph and digital orthophoto quarter quads for accuracy. GIS personnel verified all features and attributes.

    Person who carried out this activity:

    National Park Service, <PARK NAME>, <PARK DIVISION>
    c/o <WHO EVER DID THE PROCESSING>
    <POSITION TITLE>
    Unknown
    Unknown, XX XXXXX
    USA

    XXX-XXX-XXXX (voice)
    XXX-XXX-XXXX (FAX)
    XXXXX@nps.gov

    Hours_of_Service: 9AM - 5PM MST, Monday through Friday

    Data sources used in this process:

    • GPS data, DRG, DOQQ_RanchSW
    • GPS data, DRG, DOQQ_RanchSW

    Date: Unknown (process 4 of 13)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\JessicaM\Metadata\gps_metatemplate.xml

    Date: Unknown (process 5 of 13)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\JESSIC~1.LYJ\LOCALS~1\Temp\xml24.tmp

    Date: Unknown (process 6 of 13)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\JESSIC~1.LYJ\LOCALS~1\Temp\xml2C.tmp

    Date: Unknown (process 7 of 13)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\GISLAB~1.NPS\LOCALS~1\Temp\xml1C.tmp

    Date: Unknown (process 8 of 13)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\GISLAB~1.NPS\LOCALS~1\Temp\xml23.tmp

    Date: Unknown (process 9 of 13)
    Dataset moved.

    Data sources used in this process:

    • D:\_Organized\GIS\NPS_data\LYJO\data\cd_MOVE_THIS_STUFF\boundary\PARK

    Date: Unknown (process 10 of 13)
    Dataset moved.

    Data sources used in this process:

    • F:\GIS\Basedata\boundary\LYJO_bound

    Date: Unknown (process 11 of 13)
    Dataset copied.

    Data sources used in this process:

    • F:\GIS\Basedata\Administrative_Areas\LYJO_bound

    Date: Unknown (process 12 of 13)
    Metadata imported.

    Data sources used in this process:

    • F:\GIS_Lab\Basedata\Administrative_Areas\Agency\LYJO_bound_imp.shp.xml

    Date: Unknown (process 13 of 13)
    Metadata imported.

    Data sources used in this process:

    • C:\DOCUME~1\Dan\LOCALS~1\Temp\xml77.tmp

  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?

    Data collection was streamlined through use of data dictionaries attribute menus installed in the Global Positioning System (GPS) data logger. This procedure enhances attribute accuracy by reducing attribute related decision-making in the field and minimizing keying errors.

  2. How accurate are the geographic locations?

    The data were collected according to an accuracy standard of maintaining a maximum PDOP (Position Dilution of Precision) of 6, while tracking a minimum of 4 SV (satellite vehicles). These data were differentially corrected and have estimated accuracies in the X and Y direction of 0 to 5 meters, using the above standards while SA (selective availability) is set to zero. No tests were done to confirm this. In Trimble Pathfinder Office software, accuracy is not represented. Instead, precision is an estimation of the positional error (closeness to truth) available as feature attributes. To estimate precisions the software uses: receiver type (for noise), baseline length, Dilution of Precision, covariance and reference variance components. It is a repeatability measure not an accuracy measure. Horizontal Precision for line and area features looks at all the individual points that make up the line/area feature and a mean value is computed by the software.

  3. How accurate are the heights or depths?

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

    To show the perimeter and area of water tanks as they existed in July 2002.

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

    There are no duplicate features present. Polygon features (if present) begin and end at the same point.

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/CSS/Core Science Analytics and Synthesis
    c/o USGS-NPS Vegetation Mapping Program Coordinator
    Denver Federal Center, Building 810, Room 8000, MS 302
    Denver, Colorado 80225

    (303) 202-4220 (voice)
    303-202-4219 (FAX)
    gs-b-npsveg@usgs.gov

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

    Downloadable Data

  3. What legal disclaimers am I supposed to read?

    The U.S. Geological Survey and the National Park Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (if available) are not legal documents and are not intended to be used as such.

    The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. Any related graphics (if available) are intended to aid the data user in acquiring relevant data; it is not approriate to use the related graphics as data.

    The U.S. Geological Survey and the National Park Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from an U.S. Geological Survey and National Park Service servers and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the utility of the data on another 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 also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. Mention of trade names or commercial products in this metadata report does not constitute endorsement or recommendation for use by the U. S. Department of the Interior, U. S. Geological Survey and National Park Service.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 27-Jan-2007
Last Reviewed: 02-Jun-2010
Metadata author:
USGS/CSS/Core Science Analytics and Synthesis
c/o USGS-NPS Vegetation Mapping Program Coordinator
Denver Federal Center, Building 810, Room 8000, MS 302
Denver, Colorado 80225

(303) 202-4220 (voice)
303-202-4219 (FAX)
gs-b-npsveg@usgs.gov

Metadata standard:
FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata (FGDC-STD-001.1-1999)
Metadata extensions used:

Generated by mp version 2.9.12 on Wed Jun 02 12:45:48 2010
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