Lubbock 2022 Digital Orthophotography

Identification_Information:

Citation:

Citation_Information:

Originator: Bohannan Huston, Inc.
Publication_Date: 20221214
Title: Lubbock 2022 Digital Orthophotography
Geospatial_Data_Presentation_Form: raster digital data
Series_Information:

Series_Name: Lubbock Digital Orthophotography Project 2022
Issue_Identification:

RGB with color infrared (CIR) four band (4) digital orthoimagery (DOI)

Publication_Information:

Publication_Place:

1314 Avenue K Lubbock, Texas 79401

Publisher: City of Lubbock

Other_Citation_Details:

This dataset was created as a joint effort between the City of Lubbock, Bohannan Huston, Inc. and Aero-Graphics, Inc. in support of the City of Lubbock Geographic Information Systems’ mission. The data is owned by the City of Lubbock.

Online_Linkage:

Data transfer online is free at: http://ewebmap.ci.lubbock.tx.us/images/2021tiffs3in/

Description:

Abstract:

This digital orthophotography dataset consists of tiled orthophotos covering approximately 1,148 square miles as part the City of Lubbock 2022 digital orthophotography project. The 4,568 tiles of orthophotography depict four-band color (Red, Green, Blue, and Infrared (RGBI)) digital aerial photographs acquired in the late spring of 2022. The project tiling scheme of one-quarter square mile tiles is organized according to the City's grid scheme. Lens and terrain distortion have been removed through orthorectification and tonal differences between adjacent images have been minimized to form a color-balanced mosaic of the entire project area. The project area includes the City jurisdiction, Lubbock County, and the Lake Alan Henry Reservoir in Texas. Orthorectified imagery corrects for geometric distortion and creates an image-based map with features represented appropriately at ground level. Above-ground features such as buildings and bridges may show some distortion or lean due to elevation. Bridges and elevated roads have been checked for warping due to elevation modeling and corrected. Each orthorectified pixel is exactly 0.25 ft. square. This orthophoto product conforms to American Society for Photogrammetry and Remote Sensing (ASPRS) Class I Standards for 1"=50' horizontal mapping or current ASPRS Positional Accuracy Standards for Digital Geospatial Data for Standard Mapping product where Horizontal Accuracy at the 95% Confidence Level is less than or equal to 3 pixels. Project coordinate systems were established on the Texas State Plane North Central Zone 4202 projection (WKID=2276), with horizontal datum referenced to the North American Datum of 1983 (NAD83), and vertical datum to the North American Vertical Datum of 1988 with units of U.S. Survey Feet.

Purpose:

The purpose of this project is to support activities throughout the City of Lubbock, including but not limited to Geographic Information Systems data maintenance, urban, community and regional planning; project and infrastructure planning; project reporting; floodplain mapping; stormwater management; vegetation analysis; change detection; and initial project reviews.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20220514
Ending_Date: 20220527

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -102.0977357606149
East_Bounding_Coordinate: -100.9787311577625
North_Bounding_Coordinate: 33.841746586140424
South_Bounding_Coordinate: 33.0003244038146

Keywords:

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword:

imagery, base maps, Earth cover, aerial photo, orthophoto, digital photo, digital aerial photo, tiff, aerial photography, 3-inch pixel aerial photo, digital orthoimagery

Place:

Place_Keyword_Thesaurus: http://www.getty.edu/research/tools/vocabularies/tgn/
Place_Keyword: City of Lubbock
Place_Keyword: Lubbock County
Place_Keyword: Texas
Place_Keyword: United States of America

Access_Constraints: Access to this data set is provided by the City of Lubbock.
Use_Constraints:

Neither City of Lubbock, nor Bohannan Huston, Inc. (BHI) assumes liability for misuse of the data. Data should be used at the scale for which they were intended. No warranty, expressed, or implied, is made by the City of Lubbock nor BHI regarding the utility of the data on any other system, nor shall the act of distribution constitute such warranty.

THIS PUBLICATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. THE CITY OF LUBBOCK SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO THE USE OF THIS PUBLICATION, WHETHER OR NOT THE CITY OF LUBBOCK IS ADVISED OF SUCH DAMAGE.

Point_of_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: City of Lubbock
Contact_Person: Susan Nagihara

Contact_Position: GIS and Data Services
Contact_Address:

Address_Type: mailing address
Address: 1314 Avenue K
City: Lubbock
State_or_Province: Texas
Postal_Code: 79401
Country: USA

Contact_Voice_Telephone: 806-775-3163
Contact_Electronic_Mail_Address: gisanddataservices@mylubbock.us

Data_Set_Credit:

Acknowledgement of the City of Lubbock, TX GIS & Data Services Department, Bohannan Huston, Inc. and Aero-Graphics, Inc. would be appreciated for products derived from these data. Data is owned by the City of Lubbock.

Native_Data_Set_Environment: ESRI ArcGIS; ArcMap; ArcGIS Pro; GeoTIFF

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Radiometric qualities of the imagery have been inspected and color balancing processing applied to create near seamless imagery mosaics. Slight radiometric differences may exist between adjacent orthorectified photos. Radiometric differences may be attributable to changes in time and date of source image acquisition and sun angles differences along flight lines. To minimize these variations image flight acquisition adhered to ASPRS capture standards requiring at least a 30 degree sun angle above horizon for all flights. Tonal balancing was also performed during image mosaicking to adjust and optimize color matching between adjacent photos. Slight post process image sharpening was applied to the project imagery.

Logical_Consistency_Report:

Orthophoto tiles have been validated for image file/pixel size and inspected visually to ensure logical relationships between expected data elements.

Completeness_Report:

Deliverable data tiles were inspected to ensure complete image data coverage. Data tiles may be comprised of multiple flight line data sources. Sources covering the orthophoto mosaic tiles are defined by flight line photo index information. The resulting digital orthophoto image (DOI) tile is a square.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Tested 0.22 ft. (RMSE) and 0.43 ft. horizontal accuracy (NSSDA 95% confidence) to well-defined primary aerial photography control. Independent accuracy testing of reasonably defined photo ID features tested to 0.22 feet RMSE horizontal accuracy.

Quantitative_Horizontal_Positional_Accuracy_Assessment:

Horizontal_Positional_Accuracy_Value: 0.00
Horizontal_Positional_Accuracy_Explanation:

Orthoimagery/planimetric data were tested horizontally with 54 ground control points. Evaluation was made by comparison of the horizontal ground control coordinates to the corresponding control point locations on orthophotography. These were measured at the visible center of each control point panel to form the basis of the horizontal test. Reported accuracies developed from the sample of control points exhibit an RMSE of 0.22 ft or 6.7 cm and are validated 0.43 ft at the 95% confidence interval according to the Federal Geographic Data Committee (FGDC) National Standard for Spatial Data Accuracy (NSSDA).

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Bohannan Huston Inc.; Alan Benham R.P.L.S.
Publication_Date: 20220426
Title: Survey Control Report for Lubbock 2022 Orthophotography

Source_Scale_Denominator: 240
Type_of_Source_Media: Portable Document Format
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20220426

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: Control Sheets.pdf
Source_Contribution:

Geodetic control were established for the project to provide a primary control network for orthophotography mapping in the project coordinate system. Bohannan Huston, Inc. establish photo control panels tied to the existing and previous projects coordinate system.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Aero-Graphics Inc.
Publication_Date: 20220614
Title:

Airborne Collection - Microsoft/Vexcel UltraCam Eagle M3 (UCE) digital camera system with Inertial Measurement Unit (IMU) and on-board Global Positioning System (GPS).

Geospatial_Data_Presentation_Form: Image

Source_Scale_Denominator: 600
Type_of_Source_Media: Hard drive
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20220514
Ending_Date: 20220527

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: GC
Source_Contribution:

Digital aerial imagery was collected at a nominal average orthometric height of 9,250 ft. at altitude using the Microsoft/Vexcel UltraCam Eagle M3 (UCE) digital camera system. The UCE aerial imagery served the purpose of supporting the production of 3-inch ground sample distance (GSD) resolution digital orthoimagery.

Process_Step:

Process_Description:

1. Aerial Triangulation - Images were aerotriangulated to finalize their exterior orientation (EO). Intergraph ISAT and wase used to perform digital point matching/mensuration/block adjustments and quality control queries respectively. Final block adjustments were evaluated at sub-pixel accuracy.

Process_Date: 202206

Process_Step:

Process_Description:

2. Orthorectification - Images were orthorectified to remove distortions caused by changes in the elevation of the terrain, camera orientation and lens distortion. The orthorectification process used a cubic convolution interpolation method and ground elevations sampled from existing 2021 LiDAR bare-earth surface digital elevation models (DEM). Intergraph ImageStation OrthoPro® software used was for orthorectification.

Process_Date: 202209

Process_Step:

Process_Description:

3. Orthomosaic - Images were color balanced and color corrected individually to ensure color consistency between flight lines, time(s) of day, and date(s) of capture. Images were mosaicked into large aggregate tiles and automatic seamlines were used to combine the most nadir components of individual images. Aggregate tiles were again tonally balanced and color corrected with the entire project in view. A second global color adjustment was performed to minimize color changes across images. Project deliverable tiles were cut from the mosaic and formatted for delivery. Trimble OrthoVista® software was used to perform these steps.

Process_Date: 202210

Process_Step:

Process_Description:

4. Orthophoto Quality Control (QC) and Delivery. Review processes were developed to comprehensively assess output orthophoto data tiles. This process was designed to identify any areas requiring additional effort to correct issues in automatic seam line placement and/or orthorectification (and bridge warping in particular). During this assessment, all orthophoto tiles were reviewed by analysts in QGIS V3.28. Issues requiring additional work were flagged using a “call” feature indicating the type of fix required. Specific rework sites were reprocessed with Adobe Photoshop® to remedy issues identified by call features. Final review of fixed tiles was performed by an independent analyst to verify (Quality Assurance) that the call was corrected as required. Final QC data tiles were then formatted for delivery to include production of compressed (GeoTIFF, MrSid, and ECW format) and uncompressed (GeoTIFF) tiles.

Process_Date: 202212

Spatial_Data_Organization_Information:

Indirect_Spatial_Reference: GeoTIFF
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:

Raster_Object_Type: Pixel
Row_Count: 10,560 per tile; 4,568 tiles
Column_Count: 10,560 per tile; 4,621 tiles

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Grid_Coordinate_System:

Grid_Coordinate_System_Name: State Plane Coordinate System 1983
State_Plane_Coordinate_System:

SPCS_Zone_Identifier: Texas_North_Central_FIPS_4202
Lambert_Conformal_Conic:

Standard_Parallel: 32.133333
Standard_Parallel: 33.966667
Longitude_of_Central_Meridian: -98.5
Latitude_of_Projection_Origin: 31.66666666666667
False_Easting: 196855.0
False_Northing: 6561666.666666666

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column
Coordinate_Representation:

Abscissa_Resolution: 0.001
Ordinate_Resolution: 0.001

Planar_Distance_Units: U.S. Survey Feet

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983
Ellipsoid_Name: Geodetic Reference System 80
Semi-major_Axis: 6378137
Denominator_of_Flattening_Ratio: 298.257222101

Vertical_Coordinate_System_Definition:

Altitude_System_Definition:

Altitude_Datum_Name: North American Vertical Datum of 1988
Altitude_Resolution: 0.001
Altitude_Distance_Units: U.S. Survey Feet
Altitude_Encoding_Method: Implicit coordinate

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: value
Entity_Type_Definition:

4-band true color and near infrared orthoimagery is organized in four bands or channels which represent the red, green, blue, and near infrared (R,G,B,IR) portions of the electromagnetic spectrum. Each image pixel is assigned a triplet of numeric values, one for each band stored as 8-bit image data with 256 gray levels ranging from 0 to 255 for each band

Entity_Type_Definition_Source:

U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, Va.

Attribute:

Attribute_Label: value
Attribute_Definition: gray-scale
Attribute_Definition_Source:

Radiometric image brightness values generated during orthophoto processing.

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 255
Enumerated_Domain_Value_Definition: no data
Enumerated_Domain_Value_Definition_Source: User-defined

Overview_Description:

Entity_and_Attribute_Overview:

For color-infrared and natural color image composites, a digital number from 0 to 255 will also be assigned to each pixel and for each band in a three-band image represented by red, green, and blue, (natural color composite - RGB) or infrared, red and green (as RGB for a false color-infrared (CIR) composite). Areas where the rectification process is incomplete because of incomplete data (that is, lack of image data) are represented as white or 255 in all three bands.

Entity_and_Attribute_Detail_Citation:

http://nationalmap.gov/standards/pdf/6META997.PDF National Mapping Program Technical Instructions U.S. Department of the Interior U.S. Geological Survey National Mapping Division Part 6 Digital Orthophoto Quadrangles Standards for the Preparation of Digital Geospatial Metadata

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: City of Lubbock
Contact_Person: Susan Nagihara

Contact_Position:

City of Lubbock IT Operations Division Director

Contact_Address:

Address_Type: mailing address
Address: 1314 Avenue K
City: Lubbock
State_or_Province: TX
Postal_Code: 79401
Country: USA

Contact_Voice_Telephone: (806) 775-3163
Contact_Electronic_Mail_Address: gisanddataservices@mylubbock.us

Resource_Description:

Distribution_Liability

Distribution_Liability The City of Lubbock, Texas, is furnishing these geographic data on an "as is" basis, and makes no guarantee, representation or warranty concerning the accuracy or completeness of information contained in the geographic data. The City of Lubbock further makes no guarantees, representations or warranties, either expressed or implied, as to any other matter whatsoever concerning the data and product, including, without limitation, the condition of the product, or its fitness for any particular use or purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers of Bohannan Huston, Inc. (BHI) and served by the City of Lubbock, no guarantee, representation or warranty, either expressed or implied, is made regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such guarantee, representation or warranty. In no event shall the City of Lubbock or BHI have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of the delivery, installation, operation, or support.

THIS PUBLICATION IS PROVIDED BY THE CITY OF LUBBOCK "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. THE CITY OF LUBBOCK SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO THE USE OF THIS PUBLICATION, WHETHER OR NOT THE CITY OF LUBBOCK IS ADVISED OF SUCH DAMAGE.

Fees, if any, will be charged as set forth in the Texas Government Code, Chapter 552, Subchapter A, Section 552.009; Subchapter D, Section 552.205; and Subchapter F, Sections 552.261 through 552.274. For ordering, submit requests to gisanddataservices@mylubbock.us

Distribution_Liability:

Lubbock 2022 Digital Orthophotography

Metadata: