Lubbock 2021 Digital Orthophotography

Identification_Information:

Citation:

Citation_Information:

Originator: Bohannan Huston, Inc.
Publication_Date: 20220419
Title: Lubbock 2021 Digital Orthophotography
Geospatial_Data_Presentation_Form: vector digital data
Series_Information:

Series_Name: Lubbock Aerial LiDAR Survey Project 2021
Issue_Identification: Linear aerial LiDAR guided by USGS LBS 1.3

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:

Light detection and ranging (LiDAR) data was acquired over the City and County of Lubbock Texas. The project area covers approximately 1,148 square miles of urban and rural areas. The LiDAR data were acquired following guidance to achieve a US Geological Survey (USGS) Quality Level 2 (QL2) standard. Nominal point cloud density is 3.1 points per square meter. LiDAR acquisition was captured under normal ground conditions. The LiDAR acquisition platform for the project was a turbocharged Cessna 206 equipped with an Optech Galaxy T2000 LiDAR sensor, collecting multiple return x, y, and z values. A single series of these classified point cloud data were created and tiled into a project tiling scheme. Classified (categorized) point cloud datasets for the project cover 4,621 individual data tiles established for data processing and deliverable derivative products.

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.

Supplemental_Information:

Data produced in this project area include LAS classified point cloud and derivative surface format tiles base upon a project tiling scheme. Project tasks included: 1) Data Capture of aerial LiDAR point cloud data 2) Project Control, 2) LiDAR point cloud classification, 3) breakline development for specific feature conditions related to hydro characteristics, 5) Quality Review and 6) Delivery Preparation. A total of 4,621 tiled files for each elevation deliverable were produced to cover this area. The flight design achieved a nominal ground resolution sufficient for developing USGS QL2 minimum specification point cloud. In addition to airborne Global Positioning System (GPS) control and Inertial Measurement Unit (IMU) data, ground control were acquired under the supervision of a licensed Texas surveyor at sufficient density and accuracy to support production of digital elevation to the required specifications.

Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20210506
Ending_Date: 20210509

Currentness_Reference: ground condition

Status:

Progress: Complete
Maintenance_and_Update_Frequency: As needed

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -102.15480436431613
East_Bounding_Coordinate: -101.5475191716385
North_Bounding_Coordinate: 33.849500655378996
South_Bounding_Coordinate: 33.305537254080754

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; LAS/LAZ, GeoTIFF, LiDAR standard toolkits

Data_Quality_Information:

Logical_Consistency_Report:

Point cloud data set were collected from LiDAR (Light Detection and Ranging) and very large scale aerial photography for orthophoto rectification and feature interpretation of ground and non-ground surface data. Both automated and manual interpretation of these sources contribute to the classification of the point cloud.

Completeness_Report:

Deliverable data tiles were inspected to ensure complete terrain data coverage to the extent possible with overlapping LiDAR strip data within individual tiles. Therefore data tiles may be comprised of multiple flight line data sources including classified LiDAR point data. Sources covering the site are defined by flight line index information. The resulting elevation digital product tiles are a square.

Positional_Accuracy:

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

Quantitative_Vertical_Positional_Accuracy_Assessment:

Vertical_Positional_Accuracy_Value: 0.076
Vertical_Positional_Accuracy_Explanation:

Nonvegetated Vertical Accuracy (NVA) is defined as the elevation difference between open, unobstructed, typically hard-surface ground surveyed static points and the elevation of the LiDAR surface at that same horizontal location. The vertical accuracy was tested with existing field control surveys located in open terrain. There were 163 survey check points distributed throughout the project work area in vegetated and non-vegetated locations. The RMSEz of tested values over the NVA area is 0.202 ft and VVA RMSEz is 0.296 ft. Tested 0.395 ft at 95 percent confidence level in open terrain using NVA RMSEz x 1.9600.

Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Originator: Hugo Reed and Associates.; Robby Christopher, R.P.L.S.
Publication_Date: 20210426
Title: 2021 Survey Control

Source_Scale_Denominator: 240
Type_of_Source_Media: Portable Document Format
Source_Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 20210426

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. Hugo Reed and Associates were subcontracted to establish photo control panels tied to the previoous projects coordinate system.

Source_Information:

Source_Citation:

Citation_Information:

Originator: Aero-Graphics Inc.
Publication_Date: 20210510
Title:

Airborne LiDAR Collection - Optech Galaxy T2K laser scanner with Inertial Measurement Unit (IMU) and on-board Global Positioning System (GPS).

Geospatial_Data_Presentation_Form: LiDAR Point Cloud

Type_of_Source_Media: External Hard Drive
Source_Time_Period_of_Content:

Time_Period_Information:

Range_of_Dates/Times:

Beginning_Date: 20210506
Ending_Date: 20210509

Source_Currentness_Reference: ground condition

Source_Citation_Abbreviation: 2021 Lubbock LiDAR Digital_Flight_Index
Source_Contribution:

LIDAR data was captured using an Optech Galaxy T2K system with an inertial measurement unit (IMU) and dual frequency GPS receiver. Project acquisition with LiDAR sensors was organized into east/west flight lines and perpendicular cross flight lines as needed. Data acquisition across the project was designed to achieve a minimum of 3 points per square meter density.

Process_Step:

Process_Description:

1. LiDAR Calibration/Automatic Classification. After initial data post processing, point cloud data processing included calibration to project ground control and initial automated classification of point cloud data. LiDAR data were inventoried and tested for preliminary vertical accuracy verification against project control. Point cloud source data were processed initially as ground (class 2) or non-ground points (class 1) through automated means in TerraScan® and classification refined using other automated techniques.

Process_Date: 202106

Process_Step:

Process_Description:

2. Production Staging. Analysis of point cloud data was conducted to produce full production tile sets. This inventory step ensured that overlapping production tiles were considered to provide for a consistent production tiling scheme without overlap. Once a production tiling scheme was organized, a full set of quality control (QC) shaded relief products were derived from the initial automatic classification using Geospatial Data Abstraction Library (GDAL) Utilities. Data processing priorities were established to initial focus on urbanized and vegetated areas.

Process_Date: 202106

Process_Step:

Process_Description:

3. Review and Classification. Shaded relief QC products were distributed to analysts for review. Analysts placed polygonal calls identifying anomalies categorized into building, bridge, pit/spike, bunker, ridge, and other. Building calls drove manual reclassification of points from ground to unclassified using ERDAS Imagine and Safe Software FME. Pit/Spike calls were addressed through automatically reclassification by statistical means which explored for data outliers falling outside of three (3) standard deviations from the mean surface. A feedback loop at the end of the review and classification process provided an updated shaded relief image. A second analyst verified all calls to ensure correct classification.

Process_Date: 202107

Process_Step:

Process_Description:

4. Breakline Classification. Sparse breakline data was integrated for use in classification of point cloud data. Breaklines were used as reference to classify water (9), Ignored ground (near a breakline) (10). For waterbodies, extracted breaklines were conditioned to the LiDAR elevation using a review of contours and shaded relief imagery.

Process_Date: 202108

Process_Step:

Process_Description:

5. Derivative Product Develpment. From the final classified point cloud data and develped breakline information, several derivative elevation products were developed to include LAS/LAZ, DEM GeoTiffy, Contours, and surface visualization data.

Process_Date: 202109

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: Point

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:

Overview_Description:

Entity_and_Attribute_Overview: This section is not required for LiDAR LAS deliverables.
Entity_and_Attribute_Detail_Citation:

http://pubs.usgs.gov/tm/11b4/pdf/tm11-B4.pdf National Geospatial Program LiDAR Base Specification Chapter 4 of Section B, U.S. Geological Survey Standards Book 11, Collection and Delineation of Spatial Data U.S. Department of the Interior U.S. Geological Survey Techniques and Methods 11–B4 Version 1.0, August 2012 Version 1.1, October 2014 Version 1.2, November 2014 U.S. Department of the Interior U.S. Geological Survey

Distribution_Information:

Distributor:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: City of Lubbock
Contact_Person: Susan Nagihara

Contact_Position:

City of Lubbock GIS Manager, GIS and Data Services

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 2021 Digital Orthophotography

Metadata: