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Connecticut DEEP Property

Frequently-asked questions:


What does this data set describe?

Title:
Connecticut DEEP Property

Abstract:
DEEP Property is a polygon feature-based layer that includes all land owned in fee simple interest by the State of Connecticut Department of Energy and Environmental Protection.  This layer is based on information that was collected and mapped at various scales and at different levels of accuracy.  Generally, partial interests such as easements or development rights are not included in this layer.  The exception is flood control areas, which may include permanent easements.  Types of property in this layer include parks, forests, wildlife areas, flood control areas, scenic preserves, natural areas, historic reserves, DEEP owned waterbodies, water access sites and other miscellaneous properties.  This layer is current and is updated as parcels are acquired by DEEP.

  1. How should this data set be cited?

    State of Connecticut, Department of Energy and Environmental Protection (data compiler), 20170630, Connecticut DEEP Property.

    Online links:
    Other citation details:
    Data compiled at various scales using different methods. Data should be used at a 1:24,000 scale (1"=2,000'). The publication date is the most recent update. Feature data was collected between 1994 and the present.

  2. What geographic area does the data set cover?

    Bounding coordinates:
    West: -73.689575
    East: -71.780957
    North: 42.079641
    South: 41.032233

  3. What does it look like?

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/deppropertyfullview.gif (GIF)
    Full view of DEEP property features

    http://www.cteco.uconn.edu/metadata/dep/browsegraphic/deppropertydetailview.gif (GIF)
    Detail view of DEEP property features

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

    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?

      Indirect spatial reference:
      State of Connecticut, United States

      This is a Vector data set. It contains the following vector data types (SDTS terminology):
      • G-polygon (1550)

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

      The map projection used is Lambert Conformal Conic.

      Projection parameters:
      Lambert Conformal Conic
      Standard parallel: 41.200000
      Standard parallel: 41.866667
      Longitude of central meridian: -72.750000
      Latitude of projection origin: 40.833333
      False easting: 999999.999996
      False northing: 499999.999998

      Planar coordinates are encoded using coordinate pair.
      Abscissae (x-coordinates) are specified to the nearest 0.000250.
      Ordinates (y-coordinates) are specified to the nearest 0.000250.
      Planar coordinates are specified in survey feet.

      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: 1.000000
      Altitude encoding method: Explicit elevation coordinate included with horizontal coordinates

  7. How does the data set describe geographic features?

    DEEP Property
    DEEP owned land

    OBJECTID
    Internal feature number. (Source: ESRI)
                      

    Sequential unique whole numbers that are automatically generated.

    Shape
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    AV_LEGEND
    ArcView Legend.  Text field for symbolizing DEP facility types on a map. (Source: State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management)
                      

    Value Definition
    DEEP Owned Waterbody
    A DEEP owned waterbody.  This category Includes AGNCYFN_CD value EFW.
    Fish Hatchery
    A DEEP owned fish hatchery.  This category Includes AGNCYFN_CD value EFH.
    Flood Control
    A DEEP owned flood control area.  This category Includes AGNCYFN_CD value EC.
    Historic Preserve
    A DEEP owned historic preserve area.  This category Includes AGNCYFN_CD value ERH.
    Natural Area Preserve
    A DEEP owned natural area preserve.  This category Includes AGNCYFN_CD value ERN.
    Other
    A miscellaneous DEEP owned area.  This category Includes AGNCYFN_CD value EO.
    State Forest
    A DEEP owned state forest.  This category Includes AGNCYFN_CD value EXF.
    State Park
    A DEEP owned state park.  This category Includes AGNCYFN_CD value EP.
    State Park Scenic Reserve
    A DEEP owned state park scenic reserve.  This category Includes AGNCYFN_CD value EPS.
    State Park Trail
    A DEEP owned state park trail.  This category Includes AGNCYFN_CD value EPT.
    Water Access
    A DEEP owned water access site.  This category Includes AGNCYFN_CD value EFA.
    Wildlife Area
    A DEEP owned wildlife area.  This category Includes AGNCYFN_CD value EW.
    Wildlife Sanctuary
    A DEEP owned wildlife sanctuary.  This category Includes AGNCYFN_CD value EWS.

    IMS_LEGEND
    ArcIMS Legend.  Text field for symbolizing DEP facility types on a map generated by ArcIMS. (Source: State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management)
                      

    Value Definition
    Other DEEP Property
    This category includes the following values from the AV_Legend attribute:  DEEP Owned Waterbody, Fish Hatchery, Flood Control, Other, and Water Access.
    State Park or Preserve
    This category includes the following values from the AV_Legend attribute:  Historic Preserve, Natural Area Preserve, State Park, State Park Scenic Reserve, and State Park Trail.
    State Forest
    This category includes the following values from the AV_Legend attribute:  State Forest.
    Wildlife Area or Sanctuary
    This category includes the following values from the AV_Legend attribute:  Wildlife Area and Wildlife Sanctuary.

    DEP_ID
    DEP Facility Identification Number.  Values that correspond to the PROPERTY text values. (Source: State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management)
                      

    Formal codeset
    Codeset name: DEEP Facilities by ID Number
    Codeset source: State of Connecticut, Department of Environmental Protection

    AGNCYFN_CD
    Agency Function Code.  Text values that identify facility types and that correspond to the AV_LEGEND values. (Source: State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management)
                      

    ACRE_GIS
    Area of feature in acres. (Source: State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management)
                      

    Coordinates defining the features.

    SHAPE
    Feature geometry. (Source: ESRI)
                      

    Coordinates defining the features.

    PROPERTY
    Text values that correspond to the DEP_ID values. (Source: State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management)
                      

    SHAPE.area
    SHAPE.len
    Entity and attribute overview:
    Includes polygon features for all DEEP owned property such as State Parks, State Forests, Wildlife Areas, etc.  Information encoded about these features includes property type classification, two standard cartographic symbology classification schemes, and feature acreage.  Use the AV_LEGEND attribute to symbolize features by type on a map. Use the IMS_LEGEND attribute to more generally symbolize the features by type.
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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?

    James Bogar, Cartographer 1994 to 1997; Howard W. Sternberg III, Environmental Analyst 1994 to 2000; Suzanne Barkyoumb, Property Agent 1997 to 2000; Jacqueline L. Mickiewicz, Environmental Analyst, 2000 to 2010.

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

    State of Connecticut Department of Energy and Environmental Protection, Land Acquisition and Management
    79 Elm Street
    Hartford, Connecticut 06106-5127
    USA

    860-424-3016 (voice)
    860-418-5906 (FAX)
    Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time
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Why was the data set created?

DEEP Property contains property that comprises DEEP facilities such as state forests, parks and wildlife management areas.  This layer can be used with the Federal Property and Municipal Open Space layers for a more comprehensive understanding of open space and recreation land throughout the State of Connecticut.

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How was the data set created?

  1. Where did the data come from?

    Source 1, DEEP Parcels geodatabase (source 1 of 2)

    State of Connecticut, Department of Energy and Environmental Protection, DEEP Parcels.

    Type of source media: disk
    Source scale denominator: Varied
    Source contribution:
    DEEP Parcels layer for statewide DEEP owned land in geodatabase format.  Individually acquired parcels' boundaries are retained in this source layer.

    Source 2, DEEP Property geodatabase (source 2 of 2)

    State of Connecticut, Department of Energy and Environmental Protection, DEEP Property.

    Online links:
    Type of source media: disc
    Source scale denominator: Varied
    Source contribution:
    DEEP Property layer for statewide DEEP owned land in geodatabase format.

  2. What changes have been made?

    Date: As needed (change 1 of 1)
    An automated process derives the DEEP Property feature class from the DEEP Parcel polygon features. This process merges adjacent DEEP Parcel polygon features to form DEEP Property features that represent continguous land holdings for the respective state park, forest, wildlife management area, etc. This process is periodically run to recreate the DEEP Property data after the DEEP Parcels data is changed to include new acquisitions or modified to correct errors, etc.

    Person responsible for change:
    State of Connecticut, Department of Environmental Protection
    79 Elm Street
    Hartford, CT 06106-5127
    USA

    860-424-3016 (voice)
    860-424-5906 (FAX)

    Data sources used in this process:
    • Source 1, DEEP Parcels geodatabase

    Data sources produced in this process:
    • Source 2, DEEP Property geodatabase

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How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    Attributes in the DEP Property layer have valid values.  Values are within defined domains.  The AV_LEGEND values are based on the AGNCYFN_CD values.  AV_LEGEND decodes the AGNCYFN_CD field.  PROPERTY values are based on the DEP_ID values.  PROPERTY decodes the DEP_ID field.  The values in the above fields have been checked for accuracy by comparing each value to its corresponding value in the related field.  AGNCY_NO is always "3100" for the Connecticut Department of Environmental Protection and was verified for each feature.  ACRE_GIS, SHAPE_AREA, and SHAPE_LENGTH are all software calculated.  ACRE_GIS is the feature area in acres, while SHAPE_AREA and SHAPE_LENGTH are the feature area and length in feet.

  2. How accurate are the geographic locations?

    No overall positional accuracy level can be established since a variety of methods was used to map, compile and digitize the parcel features.  Consequently, the information can be assumed to be no more positionally accurate than the least accurate method, which involved tablet or heads-up digitizing at 1:24000 scale.

  3. How accurate are the heights or depths?

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

    The completeness of the data reflects the best available parcel acquisition records within the State of Connecticut Department of Environmental Protection.  However, there may be omissions due to file errors, incomplete files, missing files, or staff error in the file retrieval process.  No indication of completeness percentage is possible.

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

    No topological rules were applied.  No consistency is assumed or implied.  Features were digitized by a variety of methods including tablet digitizing, heads-up (screen) digitizing, coordinate geometry data entry, and data retrieved from global positioning satellites (GPS).  

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How can someone get a copy of the data set?

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

Access constraints: None. The data is in the public domain and may be redistributed.
Use constraints:
None.  There are no restrictions or legal prerequisites for using the data.  Once acquired, any modification made to the data must be noted in the metadata.  When printing this information on a map or using it in a software application, please acknowledge the State of Connecticut, Department of Environmental Protection as the original source for this information.

Distributor 1 of 1

  1. Who distributes the data set?

    State of Connecticut, Department of Energy and Environmental Protection
    79 Elm Street
    Hartford, CT 06106-5127
    USA

    860-424-3540 (voice)
    860-424-4058 (FAX)
    dep.gisdata@ct.gov
    Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time

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

    Connecticut DEEP Property

  3. What legal disclaimers am I supposed to read?

  4. How can I download or order the data?

    • Availability in digital form:


    • Data format:
      in format Shapefile, Feature Class (version ArcGIS)
      Network links: http://www.ct.gov/deep

  5. Is there some other way to get the data?

    The data distributor does not provide custom GIS analysis or mapping services.  Data is available in a standard format and may be converted to other formats, projections, coordinate systems, or selected for specific geographic regions by the party receiving the data.

  6. What hardware or software do I need in order to use the data set?

    Geographic information system (GIS), computer-aided drawing or other mapping software is necessary to display, view and access the information.

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Who wrote the metadata?

Dates:
Last modified: 20151228

Metadata author:
State of Connecticut, Department of Energy and Environmental Protection, Land Acquisition and Management
79 Elm Street
Hartford, Connecticut 06106-5127
USA

860-424-3016 (voice)
860-424-5906 (FAX)
Hours of Service: Monday to Friday, 08:30 to 16:30 Eastern Standard Time

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

Metadata extensions used:
  • http://www.esri.com/metadata/esriprof80.html

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