Louisiana Parish Boundaries, Geographic NAD83, LDOTD (2007) [Parishes_LDOTD_2007]

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Frequently-anticipated questions:


What does this data set describe?

Title:
Louisiana Parish Boundaries, Geographic NAD83, LDOTD (2007) [Parishes_LDOTD_2007]
Abstract:
Louisiana Parish Boundaries approved by Resolution of the GIS Council on January 19, 2000. This is a region dataset depicting the polygon boundaries of the 64 parishes comprising the state of Louisiana. Parish boundaries extend 3 miles out into the Gulf of Mexico from the coastline. This dataset was derived from many data sources and conveys the best currently (2005) available representation of the parishes of Louisiana and as a consequence, the best currently available representation of the territorial bounds of the state.
Supplemental_Information:
Revisions: (1) Extensions of Parish Boundaries in Lake Maurepas and Lake Pontchartrain in accordance with Legislative Acts 740 of 1979, Regular Session and 229 of 1980, Regular Session that made some correction to Act 740 were completed October, 2001. (2) Took the source data for the parishes and projected them into the LADOMAIN projection in UTM NAD 1983 in February, 2007.
  1. How should this data set be cited?

    Louisiana Department of Transportation and Development, February 5, 2007, Louisiana Parish Boundaries, Geographic NAD83, LDOTD (2007) [Parishes_LDOTD_2007].

    Online Links:

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -94.043186
    East_Bounding_Coordinate: -88.758344
    North_Bounding_Coordinate: 33.019555
    South_Bounding_Coordinate: 28.854233

  3. What does it look like?

    <URL:Parishes_LDOTD_2007.gif> (GIF)

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

    Calendar_Date: February 5, 2007
    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):

      • G-polygon (64)

    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 0.000000. Longitudes are given to the nearest 0.000000. 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.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 0.001000
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    Parishes_LDOTD_2007
    attribute table for parish regions (Source: LADOTD)

    SHAPE_Leng

    FIPS

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    SHAPE_Area
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.

    Shape_Area
    Area of feature in internal units squared. (Source: ESRI)

    Positive real numbers that are automatically generated.

    Parish_Num

    PARISH

    Shape
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    PARISH_FIP

    FID
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    Shape_Le_1


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?

    Louisiana Department of Transportation and Development provided the source data for production of this data set.

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

    Darryl Mack
    Louisiana Department of Transportation and Development
    IT Geographic Project Supervisor

    225-379-1283 (voice)
    225-379-1807 (FAX)
    DarrylMack@dotd.louisiana.gov


Why was the data set created?

Provide a GIS Layer containing the best existing line work available representing the parish boundaries portraying nominal attributes for each parish.


How was the data set created?

  1. From what previous works were the data drawn?

    LADOTD Parishes (source 1 of 1)
    Louisiana Department of Transportation and Development, August 31, 2005, Parish Boundaries of Louisiana from LADOTD source data, Geographic NAD83 (2005) [parishes].

    Online Links:

    • \\H00001ms016\85common\85map\ArcBase\Parishes.mdb

    Type_of_Source_Media: computer file
    Source_Contribution:
    interior parish boundaries and remaining state boundary not compiled from other sources

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

    Date: 2005 (process 1 of 1)
    Dataset copied. LADOTD PARISH data (64 files) were projected from polyconic to UTM zone 15, NAD27 coordinates to be compatible with reference data (DRGs). All other digital vector data (LOSLSABINE, LOSLPEARL, STATE_FEDERAL) were projected to UTM zone 15, NAD27 coordinates using Intergraph MGE software. The digital vector data in the common coordinate system were spliced together. The legal description data (LOSLLAKES) was converted to a digital representation and spliced into the other composite data. Line cleaning and processing was performed on the composite.

    The resultant .dgn file was converted to an Arc/Info coverage, topology was built, and the dataset projected to geographic coordinates NAD83. The Arc/Info dataset was converted to a feature class and the attributes of each parish polygon populated using LADOTD data.

    The feature class was modified to portray changes made to the parish boundaries in accordance with Legislative action to clarify boundary alignments.

    Person who carried out this activity:

    Hampton Peele
    LSU Department of Geography and Anthropology

    (225)388-3455 (voice)
    hampton@lsu.edu

    Data sources used in this process:
    • LADOTD

    Data sources produced in this process:

    • LADOTD

  3. What similar or related data should the user be aware of?

    , DOTD_Parishes.


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?

    The positional accuracy of these boundaries is estimated to be +/- 40 feet.

  3. How accurate are the heights or depths?

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

    All parishes are present.

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

    This feature class was developed using original linework that was manually digitized using USGS Quadrangle Maps along with legal parish boundary descriptions. Anomalies will be noted between these data compiled by LADOTD and boundaries that are depicted in other reference data sets (e.g. USGS DRGs). The depiction of boundaries in this data set has been heavily researched and is believed to be a better representation of the actual boundary than USGS sources. After careful examination conducted by the Louisiana GIS Council, it was resolved to use these boundaries as the most accurate data available on January 19, 2000.


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:
These unaltered data may not be redistributed without all of the elements of the metadata listed in the Supplemental_Information section of this metadata document. It is recommended that third parties wishing to use these data obtain them from the Distributor listed in this metadata document.

If these data are altered or incorporated into another dataset, they are not to be redistributed without also: altering the name of the dataset, including a Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998) compliant metadata file that describes the dataset and reflects the alteration steps that makes the new dataset different from this one, and citing this dataset in the metadata as a source for the altered dataset using the source citation specified below.

If these digital data are used in the production of a report or in the compilation of a standalone printed map, then this dataset is to be cited in the report or on the map using the source citation specified below.

The following source citation is to be used when citing this dataset: Louisiana Department of Transportation 'Parish Boundaries of Louisiana, Geographic NAD83,(2005) [parishes]'

Users hereby agree to abide by the use and reproduction conditions specified above. By using the data described in these metadata, the user acknowledges that the terms and conditions of use have been read and that the user is bound by these criteria.

  1. Who distributes the data set? (Distributor 1 of 2)

    Louisiana Department of Transportation and Development
    c/o Darryl W. Mack
    Information Technology Geographic Project Supervisor

    225-379-1283 (voice)
    225-379-1807 (FAX)
    darrylmack@dotd.louisiana.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 data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the Louisiana Department of Transportation and Development (LADOTD) be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The LADOTD does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form.

    These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures.

    Although these data have been processed successfully on computers at the LADOTD, no guarantee, expressed or implied, is made by LADOTD regarding the use of these data on any other system, nor does the act of distribution constitute or imply any such warranty. Distribution of these data is intended for information purposes and should not be considered authoritative for navigational, engineering, legal and other site-specific uses.

  4. How can I download or order the data?


  1. Who distributes the data set? (Distributor 2 of 2)

    Louisiana Oil Spill Coordinator's Office
    c/o David Gisclair
    Technical Assistance Program (TAP) Director
    Louisiana Oil Spill Coordinator's Office
    Baton Rouge, LA 70804
    USA

    (225) 219-5800 (voice)
    (225) 219-5802 (FAX)
    dgisclair@losco.state.la.us

    Hours_of_Service: 0800-1700 CST
  2. What's the catalog number I need to order this data set?

    Parishes_LDOTD_2007

  3. What legal disclaimers am I supposed to read?

    The data herein, including but not limited to geographic data, tabular data, analytical data, electronic data structures or files, are provided "as is" without warranty of any kind, either expressed or implied, or statutory, including, but not limited to, the implied warranties or merchantability and fitness for a particular purpose. The entire risk as to the quality and performance of the data is assumed by the user. No guarantee of accuracy is granted, nor is any responsibility for reliance thereon assumed. In no event shall the Louisiana Oil Spill Coordinator's Office (LOSCO) be liable for direct, indirect, incidental, consequential or special damages of any kind, including, but not limited to, loss of anticipated profits or benefits arising out of use of or reliance on the data. The LOSCO does not accept liability for any damages or misrepresentation caused by inaccuracies in the data or as a result of changes to the data caused by system transfers or other transformations or conversions, nor is there responsibility assumed to maintain the data in any manner or form. These data have been developed from the best available sources. Although efforts have been made to ensure that the data are accurate and reliable, errors and variable conditions originating from physical sources used to develop the data may be reflected in the data supplied. Users must be aware of these conditions and bear responsibility for the appropriate use of the information with respect to possible errors, scale, resolution, rectification, positional accuracy, development methodology, time period, environmental and climatic conditions and other circumstances specific to these data. The user is responsible for understanding the accuracy limitations of the data provided herein. The burden for determining fitness for use lies entirely with the user. The user should refer to the accompanying metadata notes for a description of the data and data development procedures.

    Although these data have been processed successfully on computers at the LOSCO, no guarantee, expressed or implied, is made by LOSCO regarding the use of these data on any other system, nor does the act of distribution constitute or imply any such warranty. Distribution of these data is intended for information purposes and should not be considered authoritative for navigational, engineering, legal and other site-specific uses.

  4. How can I download or order the data?


Who wrote the metadata?

Dates:
Last modified: 21-Aug-2007
Metadata author:
Louisiana Department of Transportation and Development
c/o Darryl W. Mack
Information Technology Geographic Project Supervisor
REQUIRED: The city of the address., REQUIRED: The state or province of the address. REQUIRED: The ZIP or other postal code of the address.

225-379-1283 (voice)
225-379-1807 (FAX)
darrylmack@dotd.louisiana.gov

Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


This page is <http://lagic.lsu.edu/data/losco/parishes_ldotd_2007_faq.html>
LA Geographic Information Center (LAGIC)
Generated by mp version 2.9.2 on Mon Oct 01 15:04:34 2007