The 2006 OSIP bare-earth Digital Elevation Model (DEM) was derived from digital LiDAR data was collected during the months
of March and May (leaf-off conditions). The DEM data covers the entire land area of the northern tier of Ohio (approximately
23,442 square miles. The DEM is delivered in county sets, consisting of 5,000' x 5,000' size tiles that correspond to the
tile sizes for the OSIP 1FT imagery products. Where the State borders other states (land only), the entire border of the State
is buffered by at least 1,000-feet. Along the Lake Erie Shoreline ortho coverage is buffered beyond the shoreline a minimum
distance of 2,500-feet. The file naming convention is as follows: Nxxxxyyy = 5,000' x 5,000' Tiles located in the Ohio State
Plane Coordinate System (North Zone). Sxxxxyyy = 5,000' x 5,000' Tiles located in the Ohio State Plane Coordinate System (South
Zone). Please note that xxxx and yyy represent the easting and northing coordinates (respectively) in state plane feet, The
naming convention for each tile is based upon (the bottom most-left pixel). The full county mosaic is an aggregation of the
tiles by county. The mosaic is devloped in the Ohio State Plane Coordinate System (North Zone).. The DEM tiles were provided
in ESRI ArcINFO GRID raster and ASCII grid formats, with only the LiDAR in LAS Format containing the above ground and bare-earth
LiDAR features. Ownership of the data products resides with the State of Ohio. Orthophotography and ancillary data products
produced through this contract are public domain data. The LiDAR used to generate the DEM was acquired Statewide to provide
a solid and very accurate base to use during the image rectification process. This same LiDAR can be supplemented with 3D
breaklines to generate 2-foot and/or 4/5-foot contours. The average post spacing between LiDAR points is 7-feet. The flying
altitude was 7,300-feet AMT, with the targeted flying speed at 170 knots.
Citation
Title TERRAIN, ERIE COUNTY, OHIO, USA
publication Date
2007-01-01
presentationForm
FEMA-DCS-TERRAIN
cited responsible party
-
publisher
organisation Name
State of Ohio Office of Information Technology, Ohio Geographically Referenced Information Program
Contact information
Address
, Columbus, OH
cited responsible party
-
originator
organisation Name
State of Ohio Office of Information Technology, Ohio Geographically Referenced Information Program
cited responsible party
-
originator
organisation Name
State of Ohio Office of Information Technology, Ohio Geographically Referenced Information Program
The State of Ohio has a goal to develop and maintain a seamless statewide base map, referred to as OSIP (Ohio Statewide Imagery
Program). OSIP is an initiative partnered through several State Agencies (i.e. ODOT, ODNR) through OGRIP. Data from this project
forms the foundation of the Statewide base map, and was developed primarily to support multi-use applications, including homeland
security, emergency management, economic development, and the business of government.
Resource language:
eng; USA
Resource progress code:
completed
Resource Maintenance Information
maintenance or update frequency:
unknown
Constraints on resource usage:
Constraints
Use limitation statement:
No warranty expressed or implied is made by FEMA regarding the utility of the data on any other system nor shall the act of
distribution constitute any such warranty.
Constraints on resource usage:
Legal Constraints
use constraint:
otherRestrictions
Other constraints
Use Constraints: OGRIP should be credited in derived products.This data set was acquired for the State of Ohio by Woolpert
Inc. Subcontractors for LiDAR data acquisition included Horizons, Inc.
source description
Source Contribution: The aerial LiDAR acquisition for the State of Ohio was flown to support the creation of digital orthophotography
with a 0.5-foot and 1-foot pixel resolution, as well as 1"=1,000 scale CIR Imagery. LiDAR acquisition was flown at an approximate
altitude of 7,300-feet AMT, with approximately 26,000 line miles of acquisition. The LiDAR was collected using the Leica ALS50
digital LiDAR system. Woolpert, with the assistance of Horizons, Inc. acquired all LiDAR DEM Data.Source Type External Hard
Drives
source citation
Title LiDAR Acquisition
publication Date
2006-06-26
cited responsible party
-
originator
organisation Name
Woolpert Inc.
Resource extent
Temporal Extent
2006-06-26
source
source description
Source Contribution: The aerial LiDAR acquisition for the State of Ohio was flown to support the creation of digital orthophotography
with a 0.5-foot and 1-foot pixel resolution, as well as 1"=1,000 scale CIR Imagery. LiDAR acquisition was flown at an approximate
altitude of 7,300-feet AMT, with approximately 34,000 line miles of acquisition. The LiDAR was collected using the Leica ALS50
digital LiDAR system. Woolpert, with the assistance of Horizons, Inc. acquired all LiDAR DEM Data.Source Type online
source citation
Title LIDAR Terrain Data
publication Date
2006-06-26
cited responsible party
-
originator
organisation Name
Woolpert, Inc.
Resource extent
Temporal Extent
2006-06-26
source
source description
Source Contribution: The aerial LiDAR acquisition for the State of Ohio was flown to support the creation of digital orthophotography
with a 0.5-foot and 1-foot pixel resolution, as well as 1"=1,000 scale CIR Imagery. LiDAR acquisition was flown at an approximate
altitude of 7,300-feet AMT, with approximately 34,000 line miles of acquisition. The LiDAR was collected using the Leica ALS50
digital LiDAR system. Woolpert, with the assistance of Horizons, Inc. acquired all LiDAR DEM Data.Source Type online
source citation
Title ESRI GRID DEM Mosaic
publication Date
2006-06-26
cited responsible party
-
originator
organisation Name
Woolpert, Inc.
Resource extent
Temporal Extent
2006-06-26
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy Report
evaluation Method Description
The LiDAR was acquired to meet +/- 1-foot vertical accuracy (RMSE of 0.5-foot - 95% confidence level). This is suitable for
rectification of digital orthophotography and for the creation of 2- and 5-foot contours (with the addition of 3D compiled
breaklines).The DEM was acquired to meet +/- 1-foot vertical accuracy (RMSE of 0.5-foot - 95% confidence level). This is suitable
for rectification of digital orthophotography and for the creation of 2- and 5-foot contours (with the addition of 3D compiled
breaklines).
AbsoluteExternalPositionalAccuracy
name Of Measure Vertical Positional Accuracy
measure Description
8888
Quantitative Result
result value 8888
value Units
Completeness Commission
evaluation Method Description
The following methods are used to assure LiDAR accuracy. - Use of IMU and ground control network utilizing GPS techniques.
- Use of airborne GPS in conjunction with the imagery and LiDAR acquisition. - The following software is used for validation
of the surface modeling - LiDAR DEM Data - Terrascan, TerraModeler, Leica - MicroStation - ESRI - ArcInfo - ERDAS Imagine
- Woolpert Proprietary software
Completeness Omission
evaluation Method Description
The following methods are used to assure LiDAR accuracy. - Use of IMU and ground control network utilizing GPS techniques.
- Use of airborne GPS in conjunction with the imagery and LiDAR acquisition. - The following software is used for validation
of the surface modeling - LiDAR DEM Data - Terrascan, TerraModeler, Leica - MicroStation - ESRI - ArcInfo - ERDAS Imagine
- Woolpert Proprietary software
ConceptualConsistency
measure Description
Compliance with the accuracy standard was validated by the collection of photo identifiable GPS ground control points during
the acquisition of LiDAR. The following checks were performed. - The LiDAR DEM data was checked against the project ground
control. The technical staff confirmed the accuracy of the points during initial processing. Airborne GPS was also utilized
during processing.
notes: This metadata was automatically generated from the FGDC Content Standards for Digital Geospatial Metadata standard (version
FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
Metadata contact
-
pointOfContact
individual Name Jeff Smith
organisation Name
State of Ohio, through the Office of Information Technology, Investment and Governance Division, for the Office of Information
Technology, Services Delivery Division and the Ohio Geographically Referenced Information Program (OGRIP)
Contact information
Telephone
Voice 614.466.4747
Address
77 South High Street - Room 1990, Columbus, Ohio, 43215
Country USA