20240318
17030300
1.0
FALSE
Ky_DEM_KYAPED_2FT_Phase3
5635000.000000
6020000.000000
3595000.000000
3900000.000000
1
002
Projected
GCS_North_American_1983
Linear Unit: Foot_US (0.304801)
NAD_1983_Kentucky_Single_Zone_ftUS
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20240321
16241000
20240321
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FGDC
150000000
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20240321
ArcGIS Metadata
1.0
Ky_DEM_KYAPED_2FT_Phase3
2024-03-21T12:00:00
2023-12-20T12:00:00
NV5 Geospatial
Ian Horn
Systems Engineer
500 Mero Street
Frankfort
Kentucky
40601
ian.horn@ky.gov
US
502-782-6745
raster digital data
Raster digital data
<div style='text-align:Left;'><div><div><p><span>Product: These are Digital Elevation Model (DEM) data for Kentucky as part of the required deliverables for the KYAPED_Lidar_2023 project. Class 2 (ground) LiDAR points in conjunction with the hydro breaklines were used to create a 2 foot hydro-flattened Raster DEM. Geographic Extent: 79 counties in Kentucky, covering approximately 18050 total square miles. Dataset Description: The KYAPED_Lidar_2023 project called for the planning, acquisition, processing, and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.71 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LiDAR Specification, 2023 Rev. A. The data were developed based on a horizontal projection/datum of NAD 1983 StatePlane Kentucky FIPS 1600 Feet, Foot US and vertical datum of NAVD88 Geoid 12b, Foot US. LiDAR data were delivered as processed Classified LAS 1.4 files formatted to 20384 individual 5000 ft x 5000 ft tiles, as tiled intensity imagery, and as tiled bare earth DEMs; all tiled to the same 5000 ft x 5000 ft schema. Continuous breaklines were produced in Esri file geodatabase format. Ground Conditions: LiDAR was collected in winter 2022 and 2023, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications and meet ASPRS vertical accuracy guidelines, NV5 Geospatial utilized a total of 226 ground control points that were used to calibrate the LiDAR to known ground locations established throughout the project area. An additional 561 independent accuracy checkpoints, 331 in Bare Earth and Urban landcovers (331 NVA points), 230 in Tall Weeds categories (230 VVA points), were used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.</span></p></div></div></div>
To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create intensity images, breaklines and raster DEMs. The purpose of these LiDAR data was to produce high accuracy 3D hydro-flattened digital elevation models (DEMs) with a 2 foot cell size. These raw LiDAR point cloud data were used to create classified LiDAR LAS files, intensity images, 3D breaklines, and hydro-flattened DEMs as necessary.
NV5 Geospatial
Ian Horn
Systems Engineer
500 Mero Street
Frankfort
Kentucky
40601
ian.horn@ky.gov
US
502-782-6745
False
Ian Horn
Kentucky
Adair County
Allen County
Anderson County
Barren County
Bath County
Bell County
Bourbon County
Boyle County
Breathitt County
Buchanan County
Bullitt County
Campbell County
Casey County
Claiborne County
Clark County
Clay County
Clinton County
Cumberland County
Dickenson County
Edmonson County
Estill County
Floyd County
Franklin County
Garrard County
Green County
Harlan County
Harrison County
Hart County
Jackson County
Jefferson County
Johnson County
Knott County
Knox County
Larue County
Laurel County
Lawrence County
Lee County
Leslie County
Letcher County
Lincoln County
Macon County
Madison County
Magoffin County
Marion County
Martin County
McCreary County
Menifee County
Mercer County
Metcalfe County
Mingo County
Monroe County
Montgomery County
Morgan County
Nicholas County
Oldham County
Owsley County
Perry County
Pickett County
Pike County
Powell County
Pulaski County
Robertson County
Rockcastle County
Russell County
Scott County
Sumner County
Taylor County
Washington County
Wayne County
Whitley County
Wise County
Wolfe County
Woodford County
Model
Raster
DEM
Remote Sensing
Elevation Data
Lidar
Model
Raster
DEM
Remote Sensing
Elevation Data
Lidar
Kentucky
Adair County
Allen County
Anderson County
Barren County
Bath County
Bell County
Bourbon County
Boyle County
Breathitt County
Buchanan County
Bullitt County
Campbell County
Casey County
Claiborne County
Clark County
Clay County
Clinton County
Cumberland County
Dickenson County
Edmonson County
Estill County
Floyd County
Franklin County
Garrard County
Green County
Harlan County
Harrison County
Hart County
Jackson County
Jefferson County
Johnson County
Knott County
Knox County
Larue County
Laurel County
Lawrence County
Lee County
Leslie County
Letcher County
Lincoln County
Macon County
Madison County
Magoffin County
Marion County
Martin County
McCreary County
Menifee County
Mercer County
Metcalfe County
Mingo County
Monroe County
Montgomery County
Morgan County
Nicholas County
Oldham County
Owsley County
Perry County
Pickett County
Pike County
Powell County
Pulaski County
Robertson County
Rockcastle County
Russell County
Scott County
Sumner County
Taylor County
Washington County
Wayne County
Whitley County
Wise County
Wolfe County
Woodford County
<div style='text-align:Left;'><div><div><p><span>None. However, users should 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 their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data.</span></p></div></div></div>
No restrictions apply to these data.
true
-86.4714877921
-81.9107360326
38.5830143197
36.537360071
Ground condition
2022-12-12T00:00:00
2023-03-05T00:00:00
Raster File Type = GeoTIFF; Bit Depth/Pixel Type = 32-bit float; Raster Cell Size = 2 foot; Interpolation or Resampling Technique = Triangulated Irregular Network (TIN), Linear Interpolation, Proprietary; Required Vertical Accuracy = 0.196
Esri ArcGIS 13.1.3.41833
1
-83.300115
-81.937086
38.007779
37.135175
DGI
None.
None.
None.
NONE
Data cover the entire area specified for this project.
Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data pass Non-Vegetated Vertical Accuracy specifications.
This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class.
Hydro-Flattened Raster DEM Processing: Class 2 (Ground) LiDAR points in conjunction with the hydro-breaklines were used to create a 2 foot hydro-flattened raster DEM. Using automated scripting routines in proprietary software, GeoTIFF files were created for each tile. Each surface was reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface.
2023
2
2500
2500
withheld
None.
File Geodatabase Raster Dataset
NV5 Geospatial
Ian Horn
Systems Engineer
500 Mero Street
Frankfort
Kentucky
40601
ian.horn@ky.gov
US
502-782-6745
Ian Horn
https://ky.box.com/v/kymartian-kyaped-2ftdem-phase3
dataset
Pixel
152500
192500
2.000000
2.000000
32
1
Upper Left
FALSE
LZ77
1
pixel codes
FGDBR
TRUE
row and column
2.000000
2.000000
NV5 Geospatial
Ian Horn
Systems Engineer
500 Mero Street
Frankfort
Kentucky
40601
ian.horn@ky.gov
US
502-782-6745
Ian Horn