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20260303
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FGDC
Shawn Benham
Sanborn Map Company, Inc.
Vice President of Programs
719-502-1296
305 S. Rockrimmon Blvd., Suite 200
Colorado Springs
Colorado
80919
US
sbenham@sanborn.com
20260303
ArcGIS Metadata
1.0
DE_Imagery_2024
2025-04-10
State of Delaware
remote-sensing image
<div style='text-align:Left;'><div><div><p><span>This data set consists of 0.152-meter pixel resolution (approximately 0.5-foot), 4-band orthoimages covering the entire State of Delaware. With a total of 2,010 X 1700-meters by 1700-meters (2.89 square kilometers) full orthoimage tiles providing imagery in blocks on the ground with no "no data" space, the total area of the project is 5,808.9 square kilometers (3609.48 square miles). There is no image overlap between adjacent tiles. An orthoimage is remotely sensed image data in which displacement of features in the image caused by terrain relief and sensor orientation have been mathematically removed. Orthoimagery combines the image characteristics of a photograph with the geometric qualities of a map. The design accuracy is estimated not to exceed 1.52-meters NSSDA 95% confidence (0.88-meters Root Mean Squared (RMSE) Error XY (0.62 meter RMSE X or Y). The projected coordinate system is Delaware State Plane. The horizontal datum is NAD83 2011. The vertical datum is NAVD88. The units are in meters.</span></p></div></div></div>
This orthoimagery depicts geographic features on the surface of the earth in the project area of interest under leaf-off conditions. It was created to provide easily accessible geospatial data which is readily available to enhance the capability of The State of Delaware.
This data is meant for use by requested parties. This data cannot be used without express consent.This data is meant for use by requested parties. This data cannot be used without express consent.
Kim Cloud, GISP
State of Delaware, Department of Technology and Information
Location Intelligence Team
302-739-9611
801 Silve Lake Blvd.
Dover
Delaware
19904
US
kim.cloud@delaware.gov
The State of Delaware, USA.
Delaware
Northeast USA
USA
Keywords
0.152 meter orthoimage
orthophoto
rectified image
orthoimagery
4-band orthophoto
0.152 meter orthoimage
orthophoto
rectified image
orthoimagery
4-band orthophoto
Delaware
Northeast USA
USA
<div style='text-align:Left;'><div><div><p><span>None. However, users should be aware that temporal changes may have occurred since this data set was collected and 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 its limitations.</span></p></div></div></div>
None
None
N/A
Microsoft Windows 10; ArcMap 10.8.1; ArcGIS Pro 3.4; Global Mapper v25; UltraMap v6.3.1; OrthoVista v14.1
true
-75.8081
-75.0334
39.8439
38.4498
ground condition
2024-02-19
2024-03-12
The information in the report is the result of ground control surveys performed between the dates indicated and the general conditions at the time of flight. The bounding coordinates provided within the Spatial Domain Section represents a rectangle covering the total area in which the project is located.
1
-75.807468
-75.040043
39.843909
38.449846
Last metadata review date: 2017-10-31
N/A
Since the ortho images are raster products, the logical consistency is based on how well the images fit between image tiles and between individual photo frames use to produce the ortho mosaics.
The 2010 ortho image tiles are checked for missing pixels, gaps, overlaps and other anomalies generally associated with digital orthophoto products. Any discrepancies in the ortho tiles are resolved through the use of proprietary and industry editing tools. Once the images are copied to the deliverable media they are further checked for naming, image completeness, and ability to be loaded in ArcMap.
This orthoimagery meets ASPRS Class 1 Accuracy Standards for 1"=100' scale mapping
None
The digital orthoimagery is comprised of a 4-band true color and near infrared image that is organized in four bands or channels which represents the red, green, blue and near infrared (R,G,B,IR) portions of the spectrum. The 0.152 meter pixel resolution ground sample distance (GSD) orthoimagery covers the entire State of Delaware. The imagery was acquired between February 19 and March 12, 2024, and flown at an altitude of 2740 meters (AGL) using an UltraCam Eagle M3 camera. Imagery and GPS/IMU data is downloaded from disc on the plane to disc on the ground. GPS/IMU mission data is processed together with simultaneously collected ground-based GPS base station data in forward and reverse directions. This precisely determines the aerial camera's position and orientation in the terrain (project) coordinate system and allows for correct orientation of the imagery. The LiDAR DTM is then reviewed and updated as needed to meet the final orthorectification standards set in this project. Using the processed GPS/IMU data and correctly oriented imagery, a bundle adjustment is computed (AT). The imagery is orthorectified using the AT solution and LiDAR. The orthoimagery is then color balanced to the acceptable parameters established by the customer. Orthoimagery then undergoes manual quality control to check for issues as outlined in the Digital Orthoimagery Acceptance Criteria document. Issues such as warps, smears, misalignments, etc. are corrected using proprietary tools and Adobe PhotoShop. Upon completion of the QC process, the orthoimagery is provided to the client for review in uncompressed TIFF/TFW format. All imagery was processed in required projection: Delaware State Plane, horizontal datum is NAD83 2011, units are in meters.
2025-04-10
Shawn Benham
Sanborn Map Company, Inc.
Vice President of Programs
7195021296
305 S. Rockrimmon Blvd., Suite 200
Colorado Springs
Colorado
80919
US
sbenham@sanborn.com
2010
2
1
0
-8438848.692100 4643170.357700
-8438848.692100 4843285.357700
-8353419.342100 4843285.357700
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Green
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Blue
255.000000
0.000000
8
Infrared
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0.000000
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