LandLandcov_ChangeTopDwn2016to2022_poly

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Data_Organization_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Jarlath O'Neil-Dunne, University of Vermont Spatial Analysis Laboratory, Director

Publication_Date: 20240320

Title: LandLandcov_ChangeTopDwn2016to2022_poly

Geospatial_Data_Presentation_Form: remote-sensing image

Description:

Abstract:

High resolution land cover change dataset for State of Vermont during the period 2016 to 2021/2022. It was modeled with an existing 2016 (Time Period 1, or T1) land-cover map containing the following eight land cover classes: (1) tree canopy, (2) grass/shrubs, (3) bare soil, (4) water, (5) buildings, (6) roads, (7) other impervious, and (8) railroads. Using object-based image analysis mapping techniques, the T1 map was first refined, where necessary, using all remote-sensing imagery and GIS datasets available for 2016, including LiDAR, multispectral imagery, and thematic layers (e.g., roads, building footprints). The refined T1 map was then compared to imagery and GIS data corresponding to the period 2021/2022 (Time Period 1, or T2), identifying features that had changed during the analysis interval. Each change combination was assigned to a unique category that indicated both the "from" and "to" classes, enabling monitoring of specific types of change. Change combinations that are single digit refer to areas with no change for that corresponding class number. Using change combination 1 as an example, this combination refers to areas where tree canopy has not changed during the 2016 to 2021/2022 period. Within double digit change classifications, the first digit refers to the landcover class an area started as during the change period, while the second digit refers to the landcover class an area ended as during the change period. Using change combination category 15 as an example, this refers to areas that started as tree canopy in 2016, that were then classified as buildings in 2021/2022. If a change combination category does not exist within the dataset, though it is possible to exist within this system, that type of change did not occur. Draft output was manually reviewed and edited to eliminate obvious errors of omission and commission. The final dataset contains 60 total change classes. This landcover change was mapped from a top down perspective

Purpose:

This dataset was developed as part of Updated High-Resolution Land Cover Mapping for Vermont for State of Vermont. It shows how land cover changed during the period 2016-2021/2022, highlighting landcover classes that were gained or lost during the 2024-05-06 00:00:00-year period. It is intended for use in monitoring patterns of change in State of Vermont land cover. This dataset represents a 'top down' mapping perspective in which tree canopy over hanging other features is assigned to the tree canopy class. At the time of its creation this dataset represents the most detailed and accurate land cover dataset for the area.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.454160

East_Bounding_Coordinate: -71.465281

North_Bounding_Coordinate: 45.018369

South_Bounding_Coordinate: 42.722638

Keywords:

Theme:

Theme_Keyword_Thesaurus: None

Theme_Keyword: land cover

Theme_Keyword: land-cover change

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories

Theme_Keyword: environment

Place:

Place_Keyword_Thesaurus: None

Place_Keyword: Vermont

Place_Keyword: Vermont

Place_Keyword: Vermont

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 2016

Temporal_Keyword: 2021/2022

Access_Constraints: None

Use_Constraints: None

Data_Set_Credit:

The University of Vermont Spatial Analysis Laboratory developed this map in cooperation with Vermont Center for Geographic Information

Native_Data_Set_Environment: Version 6.2 (Build 9200) ; Esri ArcGIS 10.9.1.28388

Data_Quality_Information:

Lineage:

Source_Information:

Type_of_Source_Media:

Source_Contribution:

8-class Land Cover Map for the State of Vermont, 2016 (Time Period 1, or T1), 0.5 Meter Resolution. This map contains the following classes: (1) tree canopy, (2) grass/shrubs, (3) bare soil, (4) water, (5) buildings, (6) roads, (7) other impervious, and (8) railroads.

Source_Information:

Type_of_Source_Media:

Source_Contribution:

LiDAR, 2016 (Time Period 1, or T1), Resolution Dependent on Location. Where available, original LiDAR point clouds were converted into derivatives that facilitate landscape analysis, including a digital elevation model (DEM) and a digital surface model (DSM). The DEM was subtracted from the DSM to produce a normalized digital surface model (nDSM) that indicates the height of aboveground features such as buildings and trees.

Source_Information:

Type_of_Source_Media:

Source_Contribution:

LiDAR, 2021/2022 (Time Period 2, or T2), Resolution Dependent on Location. Where available, original LiDAR point clouds were converted into derivatives that facilitate landscape analysis, including a digital elevation model (DEM) and a digital surface model (DSM). The DEM was subtracted from the DSM to produce a normalized digital surface model (nDSM) that indicates the height of aboveground features such as buildings and trees.

Source_Information:

Type_of_Source_Media:

Source_Contribution:

National Agricultural Imagery Program (NAIP) 4-band Imagery, Leaf-on, 2016 (Time Period 1, or T1), Resolution Dependent on Location.

Source_Information:

Type_of_Source_Media:

Source_Contribution:

National Agricultural Imagery Program (NAIP) 4-band Imagery, Leaf-on, 2021/2022 (Time Period 2, or T2), Resolution Dependent on Location.

Source_Information:

Type_of_Source_Media:

Source_Contribution:

Thematic GIS Datasets, Various Dates. Thematic datasets representing building footprints, roads, road centerlines, sidewalks, driveways, parking lots, alleys, county boundaries, and other datasets were used to augment change detection.

Process_Step:

Process_Description:

Land-cover change mapping was performed in eCognition, state-of-the-art software for performing object-based image analysis. This expert-system technique segments input datasets into meaningful landscape objects and classifies them according to both their individual characteristics (e.g., vegetation content from spectral imagery, vegetation height from LiDAR) and their relationships to adjacent features. First, the existing T1 land-cover map for the Chesapeake Bay Watershed was refined, where necessary, using available LiDAR, multispectral imagery, and thematic GIS datasets. Refinement of the T1 map maximized its value in subsequent change detection. The T1 map was then compared to T2 data inputs, focusing on the most important areas of landscape change. The dataset contains 60 land cover change classes. .

Process_Date: 20240308

Process_Step:

Process_Description:

The manually-reviewed and edited vector polygons representing changes to tree canopy, impervious surfaces, and barren features were incorporated into the draft classification using eCognition. This review draft was then submitted to project stakeholders for further review and comment.

Process_Date: 20240313

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count:

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: LandLandcov_ChangeTopDwn2016to2022_poly

Attribute:

Attribute_Label: OBJECTID

Attribute_Definition: Internal feature number.

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain:

Sequential unique whole numbers that are automatically generated.

Attribute:

Attribute_Label: Shape

Attribute_Definition: Feature geometry.

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain: Coordinates defining the features.

Attribute:

Attribute_Label: Id

Attribute:

Attribute_Label: gridcode

Attribute:

Attribute_Label: LC2016

Attribute:

Attribute_Label: LC2021

Attribute:

Attribute_Label: strVal

Attribute:

Attribute_Label: Acres

Attribute:

Attribute_Label: ConType

Attribute:

Attribute_Label: TOWNNAME

Attribute:

Attribute_Label: TOWNGEOID

Attribute:

Attribute_Label: Shape_Length

Attribute_Definition: Length of feature in internal units.

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Attribute:

Attribute_Label: Shape_Area

Attribute_Definition: Area of feature in internal units squared.

Attribute_Definition_Source: Esri

Attribute_Domain_Values:

Unrepresentable_Domain: Positive real numbers that are automatically generated.

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: VT Center for Geographic Information

Contact_Address:

Address_Type: Mailing and Physical Address

Address: 1 National Life Dr, Dewey Building, 2nd Floor

City: Montpelier

State_or_Province: VT

Postal_Code: 05620-2001

Country: USA

Contact_Voice_Telephone: (802) 585-0820

Contact_TDD/TTY_Telephone: None

Contact_Facsimile_Telephone:

Contact_Electronic_Mail_Address: vcgi@vermont.gov

Hours_of_Service: 7:45AM-4:30PM, M-F

Resource_Description: LandLandcov_ChangeTopDwn2016to2022_poly

Distribution_Liability:

VCGI and the State of Vermont make no representations of any kind, including but not limited to the warranties of merchantability or fitness for a particular use, nor are any such warranties to be implied with respect to the data.

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Format_Name: SHP

Format_Specification: ESRI Shapefile format

Format_Information_Content: geospatial data

File_Decompression_Technique: ZIP extraction tool

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://s3.us-east-2.amazonaws.com/vtopendata-prd/Landcover/_Packaged_Zips/LandLandcov_ChangeTopDwn2016to2022.zip

Access_Instructions: Download from web site.

Fees:

No charge when downloading from the internet, and when no custom processing is required.

Ordering_Instructions: Send an email describing data request to vcgi@vermont.gov

Turnaround: About 5 days.

Custom_Order_Process: Send an email describing data request to vcgi@vermont.gov

Technical_Prerequisites: GIS Software

Available_Time_Period:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20240318

Time_of_Day: Unknown

Metadata_Reference_Information:

Metadata_Date: 20231115

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: University of Vermont Spatial Analysis Laboratory

Contact_Person: Jarlath O'Neil-Dunne

Contact_Position: Director

Contact_Address:

Address_Type: mailing and physical

Address: 81 Carrigan Drive

Address: Aiken Center Room 205

City: Burlington

State_or_Province: VT

Postal_Code: 05405

Country: US

Contact_Voice_Telephone: 802-656-3324

Contact_Facsimile_Telephone: 802-656-8683

Contact_Electronic_Mail_Address: joneildu@uvm.edu

Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Access_Constraints: None

Metadata_Use_Constraints: None

Metadata_Security_Information:

Metadata_Security_Classification_System: N/A

Metadata_Security_Classification: Unclassified

Metadata_Security_Handling_Description: No security considerations