Tuesday, October 22, 2013 6:09:00 PM

14s_lk_5025

Raster Dataset - GRID

Description Spatial Attributes

Description

Keywords

ThemeLAS, LIDAR, Grid
Place:South Central Nebraska
Temporal:2009

Description

Abstract

ESRI Grids 1 meter resolution are created from the ground classified lidar points. The tiles are delivered in 5,000m by 5,000m tiles.

Purpose

The Lidar data combined with the 3d breaklines can be used to produce a highly accurate representation of the earth's surface (x, y and z).

Supplementary Information

Project Projection, Datums and Units Projection - UTM Zone 14 North Horizontal datum - North American Datum of 1983 (NAD83) using the latest adjustment revision (NSRS 2007) Vertical datum - North American Vertical Datum of 1988 (NAVD88) using the latest geoid (Geoid03) for converting ellipsoidal heights to orthometric heights Units - meters (to 1cm resolution)

Status of the data

Complete
Data update frequency:Unknown

Time period for which the data is relevant

Beginning date and time:20090120 at time unknown
Ending date and time:20090315 at time unknown
Description:ground condition

Publication Information

Who created the data:USDA-NRCS
Date and time:Unknown
Publisher and place:USDA-NRCS, Lincoln, NE

Data storage and access information

File name:14s_lk_5025
Type of data:raster digital data
Location of the data: \\dnr\floodplain\Lidar\sub2_area1_grids\14s_lk_5025
Data processing environment:Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.1850

Accessing the data

Size of the data:100.263 MB
Data transfer size:100.263 MB

Constraints on accessing and using the data

Access constraints:Unknown
Use constraints:Unknown

Details about this document

Contents last updated:20100205 at time 11473000

Who completed this document

Shandy Bittle
USDA-NRCS
mailing and physical address:
100 Centennial Mall N Ste 152
Lincoln, NE 68508
USA


402-437-4020 (voice)
shandy.bittle@ne.usda.gov

Hours of service:0800-1500

Standards used to create this document

Standard name:FGDC Content Standards for Digital Geospatial Metadata
Standard version:FGDC-STD-001-1998
Time convention used in this document:local time
Metadata profiles defining additonal information

Spatial

Horizontal coordinate system

Projected coordinate system name:NAD_1983_UTM_Zone_14N
Geographic coordinate system name:GCS_North_American_1983

Details

Grid Coordinate System Name:Universal Transverse Mercator
UTM Zone Number:14

Transverse Mercator Projection

Scale Factor at Central Meridian:0.999600
Longitude of Central Meridian:-99.000000
Latitude of Projection Origin:0.000000
False Easting:500000.000000
False Northing:0.000000

Planar Coordinate Information

Planar Distance Units:meters
Coordinate Encoding Method:row and column

Coordinate Representation

Abscissa Resolution:1.000000
Ordinate Resolution:1.000000

Geodetic Model

Horizontal Datum Name:North American Datum of 1983
Ellipsoid Name:Geodetic Reference System 80
Semi-major Axis:6378137.000000
Denominator of Flattening Ratio:298.257222

Altitude System Definition

Datum Name: North American Vertical Datum of 1988
Resolution: .001
Distance Units: meters
Encoding Method: Implicit coordinate

Bounding coordinates

Horizontal

In decimal degrees

West: -100.757398
East: -100.697727
North: 40.007754
South: 39.961852

In projected or local coordinates

Left: 350000.000000
Right: 355000.000000
Top: 4430000.000000
Bottom: 4425000.000000

Lineage

FGDC lineage

Process step 1

Process description:Using MARS software 1 meter ESRI floatgrid (.flt) files are exported based on the 5000 ft by 5000 ft tile scheme. The ESRI .flt files are converted to ESRI grids using the Arcinfo Workstation floatgrid command. Projection information is added and the ESRI grids are clipped to the tile boundary.
Source used:Ground_Control
Source used:LIDAR
Process date:20090414 at time 14285400

Who did this process

Doug Jacoby
Merrick & Co
mailing and physical address:
2450 S. Peoria St
Aurora, Co 80014
USA
303-353-3903 (voice)
doug.jacoby@merrick.com

Hours of service:0800-1500 MST

Sources

Source 1: Ground Control (Ground_Control)

Media:disc
Contribution:GPS control network for LIDAR acquisition and processing.

Currentness of this source

Beginning date and time: 20090120 at time unknown
Ending date and time: 20090315 at time unknown

Source 2: LIDAR (LIDAR)

Media:disc
Contribution:LIDAR points form the basis of the DTM surface.

Currentness of this source

Beginning date and time:20090120 at time unknown
Ending date and time:20090315 at time unknown

Spatial data quality

Horizontal positional accuracy

Horizontal accuracy is verified in three tests. During boresighting, adjoining flightlines are view in profile and hard edged features are observed and if necessary the flightlines are adjusted for good relative horizontal and vertical fit. The second test for horizontal accuracy is by comparing raw contours from each flightline against adjoining flightlines at specific points. The final test is the vertical LIDAR control report.
Estimated accuracy:.6 meters RMSE
How this value was determined: Horizontal accuracy will meet or exceed 0.6m RMSE (Accuracyr = 1.04m at the 95% confidence level).

Vertical positional accuracy

Survey control points were used to validate the accuracy of the LIDAR surface model after automatic and hand filtering. This surface exceeds the NSSDA vertical accuracy specifications of .185 meters RMSE..
Estimated accuracy:.185 meters RMSE
How this value was determined:Vertical elevation will meet or exceed 0.185m RMSE (Accuracyz = 0.36m at the 95% confidence level)

Spatial data description

Raster dataset information

Raster format:GRID
SDTS raster type:Grid Cell
Number of raster bands:1

Raster properties

Origin location:Upper Left
Has pyramids:FALSE
Has colormap:FALSE
Data compression type:Default
Display type:matrix values

Cell information

Number of cells on x-axis:5000
Number of cells on y-axis:5000
Number of cells on z-axis:1
Number of bits per cell:32

Cell Size

X distance:1.000000
Y distance:1.000000

Attributes

Details for Esri 1 meter Grids

Description

Esri 1 meter Grids
Source:Merrick & Co

Overview

ESRI grids made from the ground classified lidar points

Overview citation

ESRI grids made from the ground classified lidar points