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Kentucky 5 Foot Digital Elevation Model (DEM)


Identification Information:
Citation:
Citation Information:
Originator: Photo Science, inc.
Publication Date: 20130329
Publication Time: 060000
Title: Kentucky 5 Foot Digital Elevation Model (DEM)
Geospatial Data Presentation Form: model
Publication Information:
Publication Place: 100 Fair Oaks Lane, Frankfort, Kentucky, 40601, US
Publisher: Kentucky Division of Geographic Information
Online Linkage: ftp://ftp.kymartian.ky.gov/kyaped/DEMs_5FT/
Description:
Abstract: LiDAR was collected at a 1.0 meter point spacing for the entire project area while no snow was on the ground and rivers were at or below normal levels.
Purpose: Raster DEM files are used to show the Digital Elevation Model of the LAS Class 2 surface. This allows the user to create Contours and Triangular Irregular Networks.
Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20120329
Ending Date: 20120406
Currentness Reference: ground condition
Status:
Progress: In work
Maintenance and Update Frequency: Irregular
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -88.1228074445877
East Bounding Coordinate: -81.958223
North Bounding Coordinate: 39.155676
South Bounding Coordinate: 36.488360
Keywords:
Theme:
Theme Keyword Thesaurus: None
Theme Keyword: Digital Elevation Model
Theme Keyword: model
Theme Keyword: remote sensing
Theme Keyword: LiDAR
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Categories
Theme Keyword: elevation
Place:
Place Keyword Thesaurus: None
Place Keyword: US
Place Keyword: Kentucky
Access Constraints: None
Use Constraints: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of it's limitations.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Kentucky Division of Geographic Information
Contact Person: Kent Anness
Contact Position: GIS Manager
Contact Address:
Address Type: mailing and physical
Address: 100 Fair Oaks Lane
City: Frankfort
State or Province: Kentucky
Postal Code: 40601
Country: US
Contact Voice Telephone: 502-564-6268
Contact Electronic Mail Address: kent.anness@ky.gov
Data Set Credit: Photo Science, Inc. flew the LiDAR and processed the data.
Native Data Set Environment: MicroStation Version 8; TerraScan Version 12.9; Optech DASHMap 5.2000;Leica ALS Post Processor 2.74; TerraModeler Version 12.9; GeoCue Version 2011.1.20.4; QT Modeler v 7.0.3; Windows 7 Operating System
Data Quality Information:
Attribute Value Accuracy Information:
Attribute Accuracy Report: The project area requires LiDAR to be collected on average of 1.0 meter point spacing or better and vertical accuracy of 18.0 centimeters RMSE or better to support 2' contour generation.
Logical Consistency Report: Raster DEMs were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas within the project area.
Completeness Report: Datasets contain complete coverage of tiles.
Positional Accuracy:
Vertical Positional Accuracy:
Vertical Positional Accuracy Report: Raster DEMs were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas within the project area. The vertical unit of the data file is in decimal feet with 2-decimal point precision.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: Photo Science, Inc.
Publication Date: 20120101
Title: LiDAR
Geospatial Data Presentation Form: digital data
Type of Source Media: None
Source Time Period of Content:
Time Period Information:
Range of Dates/Times:
Beginning Date: 20120329
Ending Date: 20120406
Source Currentness Reference: ground condition
Source Citation Abbreviation: LiDAR
Source Contribution: LiDAR points and hydro flatted breaklines were used to produce the deliverables.
Process Step:
Process Description: Applanix software was used in the post processing of the airborne GPS and inertial data that is critical to the positioning and orientation of the sensor during all flights. POSPac MMS provides the smoothed best estimate of trajectory (SBET) that is necessary for Optech's post processor to develop the point cloud from the LiDAR missions. The point cloud is the mathematical three dimensional collection of all returns from all laser pulses as determined from the aerial mission. At this point this data is ready for analysis, classification, and filtering to generate a bare earth surface model in which the above ground features are removed from the data set. The point cloud was manipulated within the Optech software; GeoCue, TerraScan, and TerraModeler software was used for the automated data classification, manual cleanup, and bare earth generation from this data. Project specific macros were used to classify the ground and to remove the side overlap between parallel flight lines. All data was manually reviewed and any remaining artifacts removed using functionality provided by TerraScan and TerraModeler. Buffered LAS files were created in GeoCue to provide overedge to the DEM creation. These tiles were then run through automated scripting within ArcMap to create the 5' DEM. Final DEM tiles were clipped to the tile boundary to provide a seamless dataset. ERDAS IMG files were then created as the project deliverable. A manual QA review of the tiles was completed in ArcMap to ensure full coverage with no gaps or slivers within the project area.
Source Used Citation Abbreviation: LiDAR
Process Date: 20120101
Source Produced Citation Abbreviation: LiDAR post-processed data
Entity and Attribute Information:
Overview Description:
Entity and Attribute Overview: ERDAS IMG files with a 5' pixel. No Data values outside of the project area are represented with -9999.
Entity and Attribute Detail Citation: All deliverables meet specifications in contract.
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Kentucky Division of Geographic Information
Contact Person: Kent Anness
Contact Position: GIS Manager
Contact Address:
Address Type: mailing and physical
Address: 100 Fair Oaks Lane
City: Frankfort
State or Province: Kentucky
Postal Code: 40601
Country: US
Contact Voice Telephone: 502-564-6268
Contact Electronic Mail Address: kent.anness@ky.gov
Resource Description: Downloadable Data
Distribution Liability: See access and use constraints information.
Metadata Reference Information:
Metadata Date: 20120716
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Kentucky Division of Geographic Information
Contact Person: Kent Anness
Contact Position: GIS Manager
Contact Address:
Address Type: mailing and physical
Address: 100 Fair Oaks Lane
City: Frankfort
State or Province: Kentucky
Postal Code: 40601
Country: US
Contact Voice Telephone: 502-564-6268
Contact Electronic Mail Address: kent.anness@ky.gov
Metadata Standard Name: FGDC Content Standard for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
Metadata Time Convention: local time
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