Special Event Permit Detail

Application Information

ID: 7203   Event: USGS Dual Sensor Topographic Lidar Accuracy Assessment and Validation Field Survey
Application Date: 09/06/2023    Event Date: 09/19/2023   Thru: 09/28/2023
Organization: U.S. Geological Survey   Phone:
Contact 1 Name: Jeff Irwin
Address: 47914 252nd Street
Sioux Falls SD 57198
Email: Send email
Contact 2 Name:


Event Information

Permit Type(s): Parks and Open Spaces
Type of Event: Other
Horsetooth Mountain Open Space

Airborne lidar can provide high quality information about topography, vegetation, and infrastructure over large areas. The U.S. Geological Survey (USGS) 3D Elevation Program (3DEP) seeks to systematically acquire lidar data for the conterminous U.S., Hawaii, and the U.S. territories. The U.S. Department of Agriculture (USDA) Farm Production and Conversation Business Center (FPAC-BC) is the largest funding partner for 3DEP. In addition to helping fund 3DEP lidar collections, FPAC-BC also administers the National Agriculture Imagery Program (NAIP). NAIP contracts for airborne imagery collection during the peak growing season in the US and insular areas. NAIP is 4-band imagery collected at 60 cm or better resolution. One half of each state is collected each year by NAIP, with entire US coverage every two years. FPAC-BC is funding two pilot studies that will be attempting to collect imagery that meets NAIP specs and lidar that meets 3DEP Quality Level 1 (QL1) specs at the same time in a single aircraft. FPAC-BC and 3DEP are investigating these Dual Sensor collections as means to reduce the costs of collecting data for both programs. Several contractor proposals were reviewed and two were selected to collect two separate areas of interest (AOIs), one in the state of Washington and one in the state of Colorado. FPAC-BC is contracting for these data collections during the typical NAIP flying seasons for each AOI. In contrast to NAIP, 3DEP typically has lidar data collected during leaf off times so that the best representation of the topography can be obtained. Since these data will be collected under conditions that are not considered optimal for lidar, it is critically important for 3DEP to understand the accuracy and quality of the lidar data being collected in these two pilot studies, especially in vegetated areas. The goal of this study is to evaluate the performance of the topographic lidar sensors that will be collecting data under leaf on conditions. In order to do so, high accuracy Global Navigation Satellite System (GNSS), total station, and ground based lidar (GBL) data will be collected to assess the airborne lidar data. Ground truth data will be collected on geometric, amorphous, and linear features. Several forested plots will also be measured with GBL scans and total station collected ground points.

Estimated Participants: 6   Estimated Spectators: 0

Food / Alcohol:
  Food is NOT being Served.
 Alcohol is NOT being Served

   Tue. 09/19/2023: 7:00 AM - 5:00 PM
   Wed. 09/20/2023: 7:00 AM - 5:00 PM
   Thu. 09/21/2023: 7:00 AM - 5:00 PM
   Fri. 09/22/2023: 7:00 AM - 5:00 PM
   Sat. 09/23/2023: 7:00 AM - 5:00 PM
   Sun. 09/24/2023: 7:00 AM - 5:00 PM
   Mon. 09/25/2023: 7:00 AM - 5:00 PM


Reviewing Agency Comments/Status

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Parks & Open Lands

Status: Not Reviewed Yet


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Risk Management

Status: Approved

Comments: We can waive the requirement to provide proof of insurance for USGS since we are aware that the Federal government does not purchase insurance. Thank you

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Status: Approved


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