Gypsy Moth Defoliation - 2001
GIS FAQs

gypmoth2001

Metadata also available as

Frequently-anticipated questions:


What does this data set describe?

Title: gypmoth2001
Abstract:
This dataset includes polygons of tree defoliation caused by gypsy moth caterpillars. They are delimited annually on 1:100,000 scale maps by aerial observers in small aircraft from altitudes of 1000 to 1500 feet above ground level. Data for this layer were collected summer of 2001.
Supplemental_Information:
All defoliation mapped during this survey was moderate to heavy.
  1. How should this data set be cited?

    Virginia Department of Forestry, Division of Resource Information, 10/1/2001, gypmoth2001: Gypsy Moth Annual Defoliation - Virginia Location of Annual Defoliation by Gypsy Moth, Virginia Department of Forestry, <http://gisdata.virginia.gov>.

    Online Links:

    This is part of the following larger work.

    Virginia Department of Forestry, Division of Resource Information, Unknown.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -81.009444
    East_Bounding_Coordinate: -77.628032
    North_Bounding_Coordinate: 39.471986
    South_Bounding_Coordinate: 36.934549

  3. What does it look like?

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

    Beginning_Date: 1906
    Ending_Date: 1909
    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 (131)

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

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Standard_Parallel: 37.000000
      Standard_Parallel: 39.500000
      Longitude_of_Central_Meridian: -79.500000
      Latitude_of_Projection_Origin: 36.000000
      False_Easting: 0.000000
      False_Northing: 0.000000

      Planar coordinates are encoded using coordinate pair
      Abscissae (x-coordinates) are specified to the nearest 0.000000
      Ordinates (y-coordinates) are specified to the nearest 0.000000
      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.

      Vertical_Coordinate_System_Definition:
      Altitude_System_Definition:
      Altitude_Resolution: 0.000100
      Altitude_Encoding_Method:
      Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    gypmoth2001

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

    Positive real numbers that are automatically generated.

    PERIMETER
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.

    AREA
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

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

    Positive real numbers that are automatically generated.

    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.

    Yr

    SHAPE
    Feature geometry. (Source: ESRI)

    Coordinates defining the features.

    Acres
    Length of feature in internal units. (Source: ESRI)

    Positive real numbers that are automatically generated.

    SHAPE_Leng
    Internal feature number. (Source: ESRI)

    Sequential unique whole numbers that are automatically generated.


Who produced the data set?

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

    • Virginia Department of Forestry, Division of Resource Information

  2. Who also contributed to the data set?

    Virginia Department of Forestry, Division of Resource Information.

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

    Todd Edgerton
    Virginia Department of Forestry, Division of Resource Information
    Forest Health Forester
    900 Natural Resources Drive, Suite 800
    Charlottesville, Virginia 22903
    USA

    (434) 977-6555 (voice)
    (434) 296-2369 (FAX)
    todd.edgerton@dof.virginia.gov

    Hours_of_Service: 8:00 AM to 4:45 PM, Monday - Friday


Why was the data set created?

Defoliation maps are used to evaluate the efficacy of insect suppression efforts, to guide the location of ground surveys, to inform localities of pest population status and trends, and to help analyze spatial patterns and trends.


How was the data set created?

  1. From what previous works were the data drawn?

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

    (process 1 of 16)

    Person who carried out this activity:

    Virginia Department of Forestry, Division of Resource Information
    900 Natural Resources Drive, Suite 800
    Charlottesville, Virginia 22903
    USA

    (434) 977-6555 (voice)
    (434) 296-2369 (FAX)

    Hours_of_Service: 8:00 AM - 4:45 PM, Monday - Friday
    (process 2 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\My Documents\dof_metadata_template.xml

    (process 3 of 16)
    Dataset copied.

    Data sources used in this process:

    • \\HNFLL01\g\forest\health\Forest Health.mdb

    (process 4 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\New Folder\metadata.xml

    (process 5 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\My Documents\Virginia Forest Pests\Gypsy Moth ALL\Gypsy (yearly shapefiles)\2007\GM_2007_VA.shp.xml

    (process 6 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\My Documents\Virginia Forest Pests\Gypsy Moth ALL\Gypsy (yearly shapefiles)\2007\Gypsy_2007_VA_Lambert_Conic_Conformal_NAD83.shp.xml

    (process 7 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\Gypsy_2007_VA_Lambert_Conic_Conformal_NAD83.shp.xml

    (process 8 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\My Documents\Virginia Forest Pests\Gypsy Moth ALL\Gypsy (yearly shapefiles)\2007\Gypsy_2007_VA_Lambert_Conic_Conformal_NAD83.shp.xml

    (process 9 of 16)
    Dataset copied.

    Data sources used in this process:

    (process 10 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\My Documents\Virginia Forest Pests\Gypsy Moth\Gypsy (yearly shapefiles)\2008\metadata.xml

    Date: 24-Mar-2009 (process 11 of 16)
    Dataset copied.

    Data sources used in this process:

    Date: 06-Aug-2009 (process 12 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\metadata.xml

    Date: 01-Apr-2010 (process 13 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\metadata.xml

    Date: 06-Apr-2010 (process 14 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\GM_template_metadata.xml

    Date: 06-Apr-2010 (process 15 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\gm_GISDATA\2006\gypmoth2006.shp.xml

    Date: 06-Apr-2010 (process 16 of 16)
    Metadata imported.

    Data sources used in this process:

    • C:\Documents and Settings\edgertont\Desktop\gm_GISDATA\2005\gypmoth2005.shp.xml

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

    Virginia Department of Forestry, Division of Resource Information.


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 observations, including topology?


How can someone get a copy of the data set?

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

Access_Constraints: Data are available to all interested parties.
Use_Constraints: Data are only to be redistributed with accompanying metadata.

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

    Division of Resource Information, Virginia Department of Forestry
    c/o Todd Edgerton
    Forest Health Forester
    900 Natural Resources Drive, Suite 800
    Charlottesville, Virginia 22903
    USA

    (434) 977-6555 (voice)
    (434) 296-2369 (FAX)

    Hours_of_Service: 8:00 AM - 4:45 PM, Monday - Friday
  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: 0.007

    • Cost to order the data:


Who wrote the metadata?

Dates:
Last modified: 06-Apr-2010
Metadata author:
Todd Edgerton
Division of Resource Information, Virginia Department of Forestry
900 Natural Resources Drive, Suite 800
Charlottesville, Virginia 22903
USA

(434) 977-6555 (voice)
(434) 296-2369 (FAX)
todd.edgerton@dof.virginia.gov

Hours_of_Service: 8:00 AM - 4:45 PM, Monday - Friday
Metadata standard:
FGDC Content Standards for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:


Generated by mp version 2.9.6 on Tue Apr 06 11:24:08 2010