DATA ACQUISITION PROJECTS
October 2021
Ashley Summers, Information Systems Manager
AGENDA
• High-level timeline
• Status updates for
• Imagery 2022
• Lidar 2020
• Planimetric Data 2020
• Land Cover 2020
• Program-level update
TIMELINE
IMAGERY 2022
IMAGERY 2022
We have two offerings for imagery in 2022
• A custom flight similar to collections from
2002-2020
• A supplemental Nearmap imagery subscription (metro area only)
?
IMAGERY 2022 – CUSTOM FLIGHT
What’s the same?
• approximately 6,000 square miles of collection
• four-band orthoimagery
• snow-free and leaf-off flight timing
• meets American Society for Photogrammetry and Remote Sensing positional accuracy standards for mapping and geographic
information systems work
• independent quality control provided by partners and volunteers
• Vendor is The Sanborn Map Company (since 2016)
IMAGERY 2022 – CUSTOM FLIGHT
What’s new?
• Additional ground control (check points) for our independent verification of positional accuracy.
• A true-ortho process in areas historically affected by building lean errors
• No historical imagery services
• Web Mercator as a new projection option (if there is enough interest)
IMAGERY 2022 – CUSTOM FLIGHT
• Why might you want Web Mercator?
• 79% of partners that responded to a survey last spring said they need the imagery to work well in ArcGIS Online (AGOL)
• ESRI suggests using Web Mercator in AGOL to speed up performance, but it is not required.
• What should you do next?
• Respond to the survey with your interest so I know if it’s worth the extra expense to add this option to the project.
NEXT STEPS FOR IMAGERY
• 11/17 - Seek approval from DRCOG’s Finance and Budget Committee to enter into contracts
• 11/30- Collect letters of intent (LOIs) from partners to
determine who is committed to funding – extended date for those still waiting on their own budget approvals
• 12/15 – Execute contracts with Sanborn and Nearmap
• 12/31 – Nearmap subscription starts
• 2/15 – Sanborn flight window opens for Areas 1, 1a, 2
LIDAR 2020
LIDAR SPECIFICATIONS
Approximately 5,000 square miles of lidar proposed for collection.
Deliverables, captured according to U.S.
Geological Survey Lidar Base Specifications:
• classified lidar point cloud: quality level 2 and quality level 1
• bare-earth digital elevation model
• first return intensity raster
• breaklines
• Federal Geographic Data Committee metadata
• 1-foot and 2-foot machine-generated contours add-on
CONTOUR SPECIFICATIONS
Partners spent several months determining
contour methodology.
• Sample 1 – too messy
• Sample 2 – too smooth
• Sample 3 – too messy
• Sample 4 – just right
MILESTONES
Milestone Completion date
Flights ✓ September 4, 2020
QL1 and QL2 pilot available for review ✓ November 24, 2020
Lidar delivered to USGS for review March 31,2021 June 14, 2021
USGS review due to Sanborn May 31, 2021* August 1, 2021* 10/26/2021 Sanborn delivers corrections June 30, 2021* September 1, 2021* 11/30/2021 2nd USGS review due to Sanborn July 31, 2021** October 1, 2021** 1/30/2022 Reprojection/contour creation,
Hard drives shipped to partners
August 31, 2021** November 1, 2021** 2/28/2022
Available online for public download by tile 3/31/2022
This schedule assumes that a 3rd review is not required.
PROCESSING AREAS
QL2 East QL2 West
QL1
• For processing and quality control, the project area has been split up into 3 areas:
• QL2 East
• QL2 West
• QL1
SCHEDULE
• Why are we behind schedule?
• Infrastructure failure at Sanborn (~2.5 months delay)
• USGS received 3x more data to review than normal over the summer (~2.5 months delay)
• DRCOG’s prioritization request for QL2 East got lost in the shuffle for review but is Section Delivery of
Data to USGS for QC
1st Review by USGS
Completed
Corrections Resubmitted
2nd Review of USGS
Completed
Data delivered to Partners
QL1 5/7/2021 9/15/2021 10/18/2021 12/15/2021 1/15/2022
QL2 East 5/14/2021 10/26/2021 11/30/2021 1/30/2022 2/28/2022
QL2 West 6/14/2021 10/13/2021 11/8/2021 1/8/2022 2/8/2022
DELIVERY LOGISTICS
Data will be delivered:
• In the appropriate state plane zone (North or Central), with considerable overlap so that jurisdictions are
covered entirely by one or both.
• On hard drive shipped by Sanborn.
• Download option from Regional Data
North
Central
PLANIMETRIC DATA 2022
PROJECT AREAS AND SCHEDULE
Area Ready for QC
Partner QC Due
Final Delivery 1 6/15/21 7/23/21 8/30/21 2 8/9/21 9/1/21 9/10/21 3 10/5/21 10/26/21 11/11/21
4 11/9/21 11/30/21 12/21/21 5 12/8/21 12/29/21 1/19/22
Currently on schedule and working on Area 3 of 7
QC EFFORT
• AGOL webmap and services
• Student volunteers from Front Range Community College
• Issue in Group 3:
• What if modified
change doesn’t show real change?
DELIVERY PLANS
• Partners receive incremental deliveries whenever an area is finalized.
• In April 2022, when all areas are finalized, a merged layer for each feature will be created and put on the Regional Data Catalog for public download.
LAND COVER 2020
PROJECT SPECIFICATIONS
• 1-meter resolution land cover for the 10-county region (same extent as custom imagery)
• 9-classes including:
1. Structures
2. Impervious surfaces 3. Water
4. Grassland/prairie 5. Shrubland/scrubland 6. Tree canopy
SCHEDULE
• Sanborn/UVM are finding that the 2020 planimetric data is very valuable for creating the land cover data so they want to align the land cover
delivery schedule with the planimetric delivery schedule.
• The original schedule (shown below) is being reworked with roughly the same deadlines, but different areas delivered.
Deliverable Date
Pilots 7/30/21, 9/20/21
Area 1a 11/30/21
Area 1 12/31/21
Area 2 1/31/22
Area 3, metadata, accuracy assessment
2/28/22
PROGRAM UPDATE
CURRENT INVESTMENT
100%
60%
74%
30%
26%
20%
40%
50%
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
Imagery Lidar Planimetric Land cover
The 2020/2021 cycle is DRCOG’s most
ambitious to date.
Datasets from these
four projects (imagery, lidar, planimetric data and land cover) are valued at $2.9 million.
INVESTMENTS OVER TIME
$500,000
$1,000,000
$1,500,000
$2,000,000
$2,500,000
$3,000,000
$3,500,000
UPCOMING INVESTMENTS - PROPOSED
2020 – 2021 cycle
imagery
lidar
planimetric data
land cover data
2022 – 2023 cycle
imagery
planimetric data
2024 – 2025 cycle
imagery
planimetric data
land cover data
2026 – 2027 cycle
imagery
planimetric data
2028 – 2029 cycle
imagery
lidar
planimetric data
land cover data
PARTICIPATING LOCAL GOVERNMENTS
1. Adams County 2. Arapahoe County
3. City and County of Broomfield 4. Clear Creek County
5. City and County of Denver 6. Douglas County
7. Gilpin County 8. Jefferson County 9. City of Arvada 10. City of Aurora 11. Town of Bennett
15. City of Castle Rock 16. City of Centennial
17. City of Cherry Hills Village 18. City of Commerce City 19. City of Dacono
20. City of Englewood 21. Town of Erie
22. City of Federal Heights 23. Town of Firestone
24. Town of Frederick 25. City of Glendale
29. City of Lakewood 30. City of Littleton 31. City of Lone Tree 32. City of Longmont 33. City of Louisville 34. Town of Morrison 35. Town of Nederland 36. City of Northglenn 37. Town of Parker 38. Town of Superior 39. City of Thornton
GOVERNMENT AND NONPROFIT PARTNERS
1. Arapahoe County Water and Wastewater Authority
2. Colorado Department of Transportation 3. Colorado Water Conservation Board 4. Denver Water
5. E-470 Public Highway Authority
6. Jefferson County Communications Center Authority
7. Metro Wastewater Reclamation District
8. Mile High Flood District
9. Pinery Water and Wastewater District 10. Prospect Recreation and Park District 11. Regional Transportation District
12. South Metro Fire Rescue
13. South Suburban Parks and Recreation 14. United Power
15. U.S. Geological Survey
FEATURED USE CASES
Emergency response Community planning
Infrastructure improvements Event planning
Pedestrian Infrastructure and Vulnerable Populations
Permitting for Marijuana Businesses
• DRCOG showcases how imagery, lidar, planimetric data, and land cover are used in our communities.
• Consider contributing your own use case.
REMINDERS
• Commitments for DRAPP 2022 are due ASAP.
• Monthly updates are sent out to all partners. Please let me know if want to be on the list.
• Our next meeting will be in the spring.
THANK YOU! Ashley Summers
Information Systems Manager, Regional Planning and Development
