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Short Citation:
Office for Coastal Management, 2023: 2004 Florida Greenway ADS40 Orthoimagery and Digital Elevation Model,

Item Identification

Title: 2004 Florida Greenway ADS40 Orthoimagery and Digital Elevation Model
Short Name: FL_ADS40
Status: Completed
Publication Date: 2006-09-14

EarthData International collected ADS-40/ISTAR-derived orthophotos at a 50 centimeter pixel resolution to produce natural color and color infrared ortho photo tiles. The period of aerial collection was 14 DEC 2004 to 15 DEC 2004 with a reflight of several lines conducted on 1 FEB 2006. During the time of image acquisition two dual frequency GPS receivers were utilized. One receiver was operated on board the aircraft with the dual frequency antenna located directly over the camera. The second receiver was used as a base station.These receivers were in constant operation during the imagery mission and GPS phase data was collected at an epoch rate of 1 second. The airborne GPS data and IMU were used in combination with ground surveyed points to control the imagery. The imagery fully encompasses the project boundary. The DTM deliverable for this project was manually compiled using stereo pairs generated from the orthophoto flight. The DEM masspoint grid used to rectify the orthophotography was derived from the compiled DTM. All data produced for this project was referenced horizontally to NAD83, and vertically to Mean Sea Level(MSL), NAVD 88 in UTM meters.

Original contact information:

Contact Name: Harold Rempel

Contact Org: EarthData International, Inc.

Title: Director of Program Management

Phone: 301-948-8550



This data was collected and derived for the NOAA Office for Coastal Management in support of mapping efforts for the Greenway Corridor project area in Florida. This data set should be accompanied by both an associated metadata record and a data deliver index that includes unique database information for each tile of the data set.



Supplemental Information:



Theme Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Science Keywords
Global Change Master Directory (GCMD) Science Keywords
ISO 19115 Topic Category
None ADS40
None Aerial Photography
None Digital Elevation Model
None Digital Orthophotography
None Digital Terrain Model
None Orthoimage
None Orthos
None Remotely Sensed Imagery/Photos

Spatial Keywords

Thesaurus Keyword
Global Change Master Directory (GCMD) Location Keywords
Keywords Florida
Keywords Greenway Corridor
Keywords Panhandle

Physical Location

Organization: Office for Coastal Management
City: Charleston
State/Province: SC

Data Set Information

Data Set Scope Code: Data Set
Maintenance Frequency: As Needed
Entity Attribute Overview:

Leica ADS40 sensors Push-broom Cameras SP14 50 centimeter pixel resolution Color and color IR

Entity Attribute Detail Citation:

Not Applicable

Distribution Liability:

Users must assume responsibility to determine the usability of these data.

Data Set Credit: NOAA Office for Coastal Management

Support Roles

Data Steward

CC ID: 632011
Date Effective From: 2006-09-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


CC ID: 632013
Date Effective From: 2006-09-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Metadata Contact

CC ID: 632014
Date Effective From: 2006-09-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202

Point of Contact

CC ID: 632012
Date Effective From: 2006-09-14
Date Effective To:
Contact (Organization): NOAA Office for Coastal Management (NOAA/OCM)
Address: 2234 South Hobson Ave
Charleston, SC 29405-2413
Email Address:
Phone: (843) 740-1202


Currentness Reference: Ground Condition

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 632018
W° Bound: -86.227158
E° Bound: -85.019485
N° Bound: 30.674047
S° Bound: 29.691933

Extent Group 1 / Time Frame 1

CC ID: 632016
Time Frame Type: Discrete
Start: 2004-12-15

Extent Group 1 / Time Frame 2

CC ID: 632017
Time Frame Type: Discrete
Start: 2006-02-01

Spatial Information

Spatial Representation

Representations Used

Grid: Yes

Grid Representation 1

CC ID: 632004
Dimension Count: 3
Cell Geometry: Point
Transformation Parameters Available?: No

Axis Dimension 1

Dimension Type: Row
Size: 10000

Axis Dimension 2

Dimension Type: Column
Size: 10000

Axis Dimension 3

Dimension Type: Vertical
Size: 1

Access Information

Security Class: Unclassified
Security Classification System:


Security Handling Description:


Data Access Procedure:

Custom data creation available by contract;

Data Access Constraints:


Data Use Constraints:


Metadata Access Constraints:


Metadata Use Constraints:




CC ID: 745146
URL Type:
Online Resource

Activity Log

Activity Log 1

CC ID: 632036
Activity Date/Time: 2016-07-14

Date that the source FGDC record was last modified.

Activity Log 2

CC ID: 632035
Activity Date/Time: 2017-11-14

Converted from FGDC Content Standard for Digital Geospatial Metadata (version FGDC-STD-001-1998) using '' script. Contact Tyler Christensen (NOS) for details.

Activity Log 3

CC ID: 717342
Activity Date/Time: 2018-02-08

Partial upload of Positional Accuracy fields only.

Activity Log 4

CC ID: 745145
Activity Date/Time: 2018-03-13

Partial upload to move data access links to Distribution Info.

Technical Environment


Microsoft Windows 2000 Version 5.0 (Build 2195) Service Pack 4; ESRI ArcCatalog

Data Quality


Orthophotos were created from the aerial photography using compiled DEM data and photo triangulation data. The ground control for this project consisted of 25 vertical/horizontal photo-identifiable points.The ground control is referenced horizontally to NAD83, and vertically to Mean Sea Level(MSL), NAVD 88 in UTM meters. Airborne GPS data was collected during the acquisition mission for each flight line. The control points were measured by technicians using ISTAR software. The final bundle adjustment of this block was solved using airborne GPS. During GPS data collection, the Positional Dilution of Precision (PDOP) was monitored and held at or below 3.5 when possible. Imagery was mosaiced to provide seamless coverage. Images were then radiometrically corrected for tone balance and geometry quality control along tile edges for terrain and linear features.

Horizontal Positional Accuracy:

The digital mapping products fully comply with ASPRS Class 1 standards for production of orthophotos at a scale of 1/2400 with an orthophoto ground pixel resolution of 50 centimeters .

Vertical Positional Accuracy:

The DEM and DTM fully comply with the contracted specification of 50-centimeters RMSE in the vertical.

Completeness Measure:

Cloud Cover: 0

Completeness Report:

The following methods are used to assure imagery accuracy. 1. Use of IMU and ground control network utilizing GPS techniques. 2. Use of airborne GPS in conjunction with the acquisition of imagery. The following software is used for validation of the 1. Aerotriangulation - ISTAR 2. DEM data - photogrammetrically compiled 3. Digital Orthophotography - ISTAR The following software was used for the validation. 1. Bentley - Microstation 2. ISTAR 3. ZI OrthoPro 4. ESRI - ArcInfo 5. EarthData Proprietary software

Conceptual Consistency:

Compliance with the accuracy standard was ensured by the collection of photo identifiable GPS ground control before and after the acquisition of aerial imagery. The following checks were performed. 1. The ground control and airborne GPS data stream were validated through a fully analytical bundle aerotriangulation adjustment. 2. The DEM data was checked against the project control. The technician visited and confirmed the accuracy of the points during initial processing 3. Digital orthophotography was validated through an inspection of edge matching and visual inspection for image quality. 4. Planimetry was validated through an inspection of edge matching and visual inspection for data quality.



Florida Greenway Corridor. Aerial Acquisition

CC ID: 631997
Contact Name: EarthData Aviation
Publish Date: 2006-02-01
Extent Type: Discrete
Extent Start Date/Time: 2004-12-15
Scale Denominator: 2400
Source Contribution:

The aerial imagery acquisition for the Florida Greenway Corridor was flown to support the creation of digital orthophotography with a 50 centimeter pixel. The imagery was acquired in four sorties at 15,700 feet AMT, using the Leica ADS40 sensors, SP14. | Type of Source Media: external hard drive

Florida Greenway Digital Orthophoto Ground Control

CC ID: 631998
Contact Name: Terrasurv Inc.
Publish Date: 2005-02-25
Extent Type: Discrete
Extent Start Date/Time: 2006-03-13
Scale Denominator: 2400
Source Contribution:

Terrasurv Inc. was contracted by EarthData to provide survey services in the NW Greenway located in Bay, Calhoun, Franklin, Gulf, Walton and Washington Counties, Florida. Digital aerial imagery (Leica ADS-40) observations were made for the project.Terrasurv utilized the Global Positioning System (GPS) to establish the control network. 1) The photo control stations were established post flight; therefore all new stations are photo-identifiable points. No permanent stations were set. There were a total of 25 new photo identities established. In addition, there were 3 temporary base points and the airborne GPS (ABGPS) base station used by the flight crew. 2) 17 additional photo identities were obtained in December of 2005 to support the reflight of several flight lines. | Source Geospatial Form: model | Type of Source Media: paper

Florida Greenway DTM and DEM

CC ID: 631999
Contact Name: EarthData International Inc
Publish Date: 2006-04-27
Extent Type: Discrete
Extent Start Date/Time: 2006-04-27
Source Contribution:

Photogrammetrically compiled DTM was used for the bare earth ground elevation dataset deliverable of this project. A gridded, DEM was derived from this dataset to rectify the orthophotography for this project. Stereo imagery generated from the ADS40 flight data was used for the photogrammetric collection. The scale of the sources was 30 meter and 2 meter grids. | Source Geospatial Form: map | Type of Source Media: external hard drive

Process Steps

Process Step 1

CC ID: 632000

The airborne GPS data were processed and integrated with the IMU. The results were imported into the ISTAR system for use in the aerotriangulation. The ADS40 imagery was downloaded onto the EarthData server and brought over to the UNIX based ISTAR system. The ground control was used in conjunction with the processed ABGPS results for the aerotriangulation. The properly formatted ISTAR results were used for subsequent processing.

Process Date/Time: 2005-06-16 00:00:00

Process Step 2

CC ID: 632001

This process describes the import and QC of the photogrammetrically-derived DEM surface from stereo pairs for use in the ISTAR processing system. 1. Using the DEM data set, the technician performed a visual inspection of the data to verify that the flight lines met correctly. The technician also verified that there were no voids, and that the data covered the project limits. The technician then selected a series of areas from the dataset and inspected them where adjacent flight lines met. A process, which utilizes 3-D Analyst and EarthData's proprietary software was run to detect and color code the differences in elevation values and profiles. The technician reviewed this information and located the areas that contained systematic errors or distortions that were introduced by the auto correlation. 2. Systematic distortions highlighted in step 1 were removed and the data were re-inspected. Corrections and adjustments can involve the application of angular deflection or compensation for curvature of the ground surface that can be introduced by crossing from one type of land cover to another. 3.The data were checked against the control network to ensure that vertical requirements were maintained.

Process Date/Time: 2005-06-22 00:00:00

Process Step 3

CC ID: 632002

The digital orthophotography is comprised 50 centimeter pixel Ground Orthos. Once the DEM data was integrated into the ISTAR system the initial radiometric adjustments were performed on the imagery for each flight line attempting to reach the best possible histogram. The rectification process was run using the processed DEM surface and the radiometrically balanced imagery on each flight line. A second set of radiometric adjustments were made and mosaic lines were placed. QA/QC was performed looking for smears and other indications of problems within the digital orthophoto creation process. The final imagery data set is removed from the ISTAR environment in a process called "packaging" where the individual tiles are created. The created tiles are reviewed again for anomalies and interactive radiometric adjustment applied where needed. The final product was GeoTIFF format digital orthos.

Process Date/Time: 2005-06-30 00:00:00

Catalog Details

Catalog Item ID: 48369
GUID: gov.noaa.nmfs.inport:48369
Metadata Record Created By: Anne Ball
Metadata Record Created: 2017-11-14 14:43+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2023-05-30 18:09+0000
Metadata Record Published: 2018-03-13
Owner Org: OCM
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2018-03-13
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2019-03-13