ElevationDEM_DEMHF0p7M2017

Metadata:

• Identification_Information
• Data_Quality_Information
• Spatial_Reference_Information
• Entity_and_Attribute_Information
• Distribution_Information
• Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator:

Vermont Center for Geographic Information (VCGI), NRCS, USGS, VT ANR, VTRANS, University of Vermont Spatial Analysis Lab (UVM-SAL), LCBP, and other contributing members of the VCGI Lidar Program.

Publication_Date: 20181219

Publication_Time: As Updated.

Title: ElevationDEM_DEMHF0p7M2017

Edition: 2018A

Geospatial_Data_Presentation_Form: raster digital data

Series_Information:

Series_Name:

Quality Level 2 Lidar Hydro-Flattened Digital Elevation Model (DEMHF) data from the 3D Elevation Program (3DEP).

Issue_Identification: 2018

Publication_Information:

Publication_Place: Montpelier VT 05620-2001

Publisher: VT Center for Geographic Information

Other_Citation_Details:

Tile Structure - QL2 collections have 1400m x 1400m based on VTSPC origin (0, 0); QL3 and earlier collections tiles vary.

Description:

Abstract:

This metadata applies to the following collection area(s): "Western VT" 2017 (Addison, Bennington & Franklin Counties) 0.7m and Digital Elevation Model (DEM) dataset with the following "hydro-treatment": *DEMHF. This metadata complies with the VT Geodata Portal format and applies to thematic layers with the same resolution (RESCLASS), e.g., 0p7m, 1m etc., and may include multiple data "collection" efforts. For original vendor metadata and reports containing specific details on each data collection, e.g., 'point cloud' flight dates, nominal pulse spacing, RMSEz and more, navigate to https://drive.google.com/drive/folders/1BFtJiwqPrO5iJ_HeSS8TeSrP-6xDo7RI. NOTE: The QL2 (0.7m) collections FOCUS reports contain myriad collection details in report form. The equivalent for the older QL3 collections are generally the “Project Reports". Available DEMs vary by collection and can include the following 'hydro treatment' DEMs: 1) Elevation*_DEM_*: ("pure" Bare Earth) - no treatments, i.e., a bare ground surface without objects like vegetation and buildings; 2) Elevation*_DEMHF_*: (DEM Hydro-Flattened)- Cartographic/Aesthetic enhancement of (topographic) surface by removal of Lidar artifacts in water. Constant elevation for waterbodies and suitable for contouring. Building voids remain due to cost; and 3) Elevation*_DEMHE_*: (DEM Hydro-Enforced): A (hydrologic) surface with drain connectivity used by engineers in Hydraulic and Hydrologic (H&H) modeling. NOT for traditional mapping (contours, etc.). Like DEM_HF but added Single Line Breaklines: Pipelines, Culverts, Underground Streams, etc. For an overview of the "VCGI Lidar Program" please see "https://vcgi.vermont.gov/data-and-programs/lidar-program".

Purpose:

To provide Vermont with the best available, Lidar based DEM and derived datasets. The VCGI Lidar Program is a collaboration of both public and private interests working towards the common goal of full state Lidar coverage. Ultimately, each Lidar dataset becomes integrated with the U.S. Geological Survey (USGS) 3D Elevation Program (3DEP) national data repository (3DEP abstract - https://pubs.usgs.gov/circ/1399/). Implemented in 2012 to address the growing need for high quality topographic data, the 3DEP absorbed its predecessor, the National Elevation Dataset (NED). Lidar in Vermont includes two "Elevation Quality Levels (QL)": "QL2" (statewide) and "QL3" (partial coverage) (See the "Resources: Lidar Data Quality Levels (QLs)" link for details at - "https://vcgi.vermont.gov/data-and-programs/lidar-program").

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20171105

Ending_Date: 20171121

Currentness_Reference: Ground Conditions

Status:

Progress: In work

Maintenance_and_Update_Frequency: Unknown

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -73.415887

East_Bounding_Coordinate: -72.384970

North_Bounding_Coordinate: 45.017564

South_Bounding_Coordinate: 42.738010

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category

Theme_Keyword: 3D Elevation Program (3DEP)

Theme_Keyword: grid

Theme_Keyword: Lidar

Theme_Keyword: Light Detection And Ranging

Theme_Keyword: LAS Point Cloud

Theme_Keyword: high-resolution

Theme_Keyword: topography

Theme_Keyword: USGS

Theme_Keyword: U.S. Geological Survey

Theme_Keyword: DEM

Theme_Keyword: Digital elevation model

Theme_Keyword: Elevation

Theme_Keyword: Digital terrain model

Theme_Keyword: Surface Model

Theme_Keyword: Hydrologic

Theme_Keyword: Hydrologic Modeling

Theme_Keyword: Drainage Area

Theme_Keyword: Hydrology

Theme_Keyword: imageryBaseMapsEarthCover

Theme_Keyword: 010

Theme_Keyword: geoscientificInformation

Theme_Keyword: 008

Theme_Keyword: location

Theme_Keyword: 013

Theme:

Theme_Keyword_Thesaurus: American Society of Photogrammetry and RemoteSensing

Theme_Keyword: National Standards for Spatial Digital Accuracy (NSSDA)

Place:

Place_Keyword_Thesaurus:

U.S. Department of Commerce, 1995, Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard 10-4,): Washington, D.C., National Institute of Standards and Technology

Place_Keyword: United States

Place_Keyword: U.S.

Place_Keyword: US

Place_Keyword: USA

Place_Keyword: Vermont

Place_Keyword: VT

Temporal:

Temporal_Keyword_Thesaurus: None

Temporal_Keyword: 2017

Access_Constraints:

VCGI and the State of VT 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.

Use_Constraints:

None. However, users should be aware that no assessment of the accuracy of DEM data or derived data products has been made by VCGI. Users should also be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of it's limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.

Point_of_Contact:

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: 9am - 5pm, M-F

Data_Set_Credit:

Each Lidar "collection" effort is a collaboration of federal, state, regional and local partners.

Security_Information:

Security_Classification_System: N/A

Security_Classification: Unclassified

Security_Handling_Description: No Security Considerations

Native_Data_Set_Environment: ESRI ArcGIS software

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Logical_Consistency_Report:

Deliverables were tested by both the providing vendor and the U.S. Geological Survey to be compliant with the Lidar Base Specification. For each "collection extent" provided by a vendor, all data is seamless from one tile to the next, no gaps or no data areas.

Completeness_Report:

Datasets contain complete coverage of each individual data collection area (extent) - see the VCGI Lidar data product web page for details - https://vcgi.vermont.gov/data-and-programs/lidar-program.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

See VCGI Lidar data product web page link above for full details by collection extent. The project specifications require that only Non-Vegetated Vertical Accuracy (NVA) be computed for raw lidar point cloud swath files. The required accuracy (ACCz) is: 19.6 cm at a 95% confidence level, derived according to NSSDA, i.e., based on RMSE of 10 cm in the "bare earth" and "urban" land cover classes. The NVA was tested with 122 checkpoints located in bare earth and urban (non-vegetated) areas. Tested 0.095 meters NVA at a 95% confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA). The NVA of the DEM was calculated using 122 independent checkpoints located in the Bare Earth and Urban land cover categories. Tested 0.267 meters VVA was calculated using 88 checkpoints located in the Forested, Brushland/Trees, and Tall Weeds/Crops land cover categories at the 95th percentile, derived according to ASPRS Guidelines, Vertical Accuracy Reporting for Lidar Data. Tested against the DEM.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Quantum Spatial

Publication_Date: 2017

Title: Western Vermont 2017 QL2 Lidar; Hydro-Flattened DEM

Other_Citation_Details:

Type_of_Source_Media: online

Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20171105

Ending_Date: 20171121

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: VT_WesternVT_QL2_2017

Source_Contribution:

This data source was used to populate the lidar point cloud data.

Source_Information:

Source_Citation:

Citation_Information:

Originator: VT Center for Geographic Information

Publication_Date: 20181219

Publication_Time:

Title: ElevationDEM_DEM

Geospatial_Data_Presentation_Form: raster digital data

Publication_Information:

Publication_Place:

Publisher: 3D Elevation Program (3DEP)

Source_Scale_Denominator:

Type_of_Source_Media: download & web services

Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date:

Time_of_Day: Unknown

Source_Currentness_Reference: Publication Date

Source_Citation_Abbreviation:

Source_Contribution:

Process_Step:

Process_Description:

Imported vendor delivered DEMs in a tile format at contracted resolution to an updated naming convention (VIL Backend Design Document v.5)

Process_Date: 10/28/2018

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mike Brouillette

Contact_Organization: VCGI

Process_Step:

Process_Description:

Updated metadata format using VT GeoData Portal metadata template. Compressed, and tasked DBA to load into VGIS Data Warehouse.

Process_Date: 12/19/2018

Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: Mike Brouillette

Contact_Organization: VCGI

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System

State_Plane_Coordinate_System:

SPCS_Zone_Identifier: 4400

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999964

Longitude_of_Central_Meridian: -72.500000

False_Easting: 500000.000000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.001

Ordinate_Resolution: 0.001

Planar_Distance_Units: Meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983 (2011)

Ellipsoid_Name: Geodetic Reference System 80

Semi-major_Axis: 6378137

Denominator_of_Flattening_Ratio: 1 / 298.25722210

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988

Altitude_Resolution: 0.01

Altitude_Distance_Units: meters

Altitude_Encoding_Method:

Explicit elevation coordinate included with horizontal coordinates

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: raster attributes

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: Value

Attribute_Definition: Elevation in Meters

Attribute_Domain_Values:

Range_Domain:

Range_Domain_Minimum: 28.9

Range_Domain_Maximum: 1338.99

Attribute_Units_of_Measure: Meters

Overview_Description:

Entity_and_Attribute_Overview:

The single attribute of this Floating Point type image is elevation in meters.

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: 9am - 5pm, M-F

Resource_Description: ElevationDEM_DEMHF0p7M2017

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: ERDAS Imagine .img format

Format_Specification: ERDAS Imagine

Format_Information_Content: geospatial data

File_Decompression_Technique: Image viewer

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name:

https://maps.vcgi.vermont.gov/gisdata/vcgi/lidar/0_7M/2017/DEMHF/

Access_Instructions:

Download compressed (ERDAS Imagine) from web site. Uncompressed Imagine datasets available on offline media.

Offline_Option:

Offline_Media: USB drive

Fees:

No charge when downloading compressed (ERDAS Imagine) from the internet, and when no custom processing is required. Charge for offline media options (uncompressed GeoTIFF).

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: 20181219

Time_of_Day: Unknown

Metadata_Reference_Information:

Metadata_Date: 20181219

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: VT Center for Geographic Information

Contact_Person: GIS Database Administrator

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:

Metadata_Standard_Name: FGDC Content Standards for Digital 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