Click to edit Master title style Click to edit Master title style Denver Regional Aerial Photography Project 2018 Presented by: Ashley Summers & Steve Ashbee April 2018
Click to edit Master title style Agenda Click to edit Master title style • Welcome and Introductions • Spring Flight Update • Interim WMTS and Geoserve If on the • Brief Geoserve Tour webinar, • use chat to QAQC Procedure ask ?s • Partner GCPs • Aesthetic Survey Results • Orders • Supplemental Imagery • Upcoming Milestones If in the • Communication Schedule room, • Imagery Derivatives please use • Planimetrics 2018 mics!
Overall Extent of Survey 6,031.75 Square Mile Area • 5,283 tiles @ 3” resolution – 1,320.75 sq. miles • 1,392 tiles/sq. miles @ 6” resolution • 3,319 tiles/sq. miles @ 12” resolution • Total of 9,994 orthophoto tiles 3
Control and Flight Plan Overview 3” Acquisition Sensor: Ultracam Eagle Focal Length: 100mm Bands: R,G,B, NIR Height AGL: 4,733’ Flight lines: 139 Images: 27,292 Side O/L: 35% End O/L: 80% Plan is supplemented with additional flight lines along street C/L’s in downtown core area. 4
Control and Flight Plan Overview 6” Acquisition Sensor: Ultracam Eagle Focal Length: 100mm Bands: R,G,B, NIR Height AGL: 9,466’ Flight lines: 41 Images: 3,717 Side O/L: 30% End O/L: 80% 5
Control and Flight Plan Overview 12” Acquisition Sensor: Ultracam Eagle Focal Length: 100mm Bands: R,G,B, NIR North & East Blocks – Spring Flight Height AGL: 18,932’ Flight lines: 30 Images: 841 Side O/L: 30% End O/L: 60% West Block – Summer Flight Height AGL: 12,692’ Flight lines: 32 Images: 1,506 Side O/L: 30% End O/L: 60% 6
2018 Spring Acquisition Summary Timeframe • Contract Spring Flight season scheduled 15-Feb to 15 April • Conditions offered opportunities to fly beginning 27-Feb • Complete coverage was accomplished by 17-March – One additional re-flight authorized 24-April to remedy a couple of small areas affected by clouds or cloud shadows. 7
2018 Spring Acquisition Summary Equipment • 3 twin-engine, pressurized aircraft 2 Turbo-Commanders (N940U, N690EH) • 2 1 Turbo Merlin III (N9900) 8
2018 Spring Acquisition Summary Equipment • 3 Vexcel UltraCam Eagle Cameras • Image size 20,010 by 13,080 pixels • Color (multi-spectral capability) 4 channels – R, G, B & NIR • Pixel size 5.2 μm • Input data quantity per image 842 Mega Bytes 9
2018 Spring Acquisition Summary Stats • 13 flight days – Roughly 70 flight hours • 16 mission (including re-flights) • Approximately 62,000 exposures – About 45 sensor hours Challenges • Air Traffic, especially east part of 3” ortho area, very busy air space • Weather at beginning and end of flight schedule Opportunities • ATC helpful and understanding • Dry winter, little snow cover • Weather was generally cooperative, especially during 1 st two weeks of March 10
Click to edit Master title style Interim Imagery - “Quick Ortho” Services Click to edit Master title style • Interim data is being streamed already – months earlier than in previous projects! • The “Quick Ortho” methodology is meant to provide you with the earliest possible access to the 2018 imagery. You will likely see positional accuracy and aesthetic issues (all to be corrected in your final deliverable). • Everyone has access to the highest resolution captured, because: • Creating multiple services and restricting access would delay delivery; • The services are temporary and will expire when final deliveries are made; • QAQC will be better if everyone is looking at the best data; and • It’s an opportunity to show the quality of the 3 -inch data to those that haven’t yet paid in for that resolution (there’s still time to buy -up!).
Click to edit Master title style Interim Imagery - “Quick Ortho” Services Click to edit Master title style • Two options for access: Geoserve and a WMTS • Geoserve is a proprietary web interface developed by Sanborn that shows the imagery with other important contextual layers. • This is what we will use in the fall for QAQC. • The WMTS can be loaded in ArcGIS (be sure to Add WMTS Server instead of a WMS server). • One layer in the service – coming May 2018 • Color-balance – coming July 2018 • Final WMTS (ortho, no seamlines) – coming December 2018 • Credentials were distributed via email on 3/15/18.
Click to edit Master title style Click to edit Master title style BRIEF GEOSERVE TOUR
Click to edit Master title style QAQC Procedure Click to edit Master title style • Partners • Use Geoserve to report aesthetic issues including: • Seamlines, shadows, building lean, blur, haze, bridge distortion, etc. • Assignments have already been accepted. • Work will be done in the fall. • Training and criteria will be provided. • DRCOG • Who is responsible for DAT this • year? We are! Use past project GCPs to evaluate positional accuracy. • Why? To save money and to evaluate firsthand the cost/benefit of doing it ourselves…
Click to edit Master title style Partner GCPs Click to edit Master title style • Did you lay out panels for the spring flights? • Will you lay out panels for the summer flights? • If yes, please: • Send to DRCOG in case we need additional points for DAT. • Reference these guidelines.
Click to edit Master title style Aesthetics Survey Results Click to edit Master title style • Conducted in February • 23 respondents • Focused on contrast, since we determined color and brightness preference during DRAPP 2016. • The vote was to increase contrast for all resolutions (between 25% for urban 3inch and 45% in rural 12inch when compared to 2016).
Click to edit Master title style Orders Click to edit Master title style • No SID this year because a bug in the LizardTech software is keeping us from generating multi-resolution SIDs. We still offer a compressed format (JPG2000). • Orders have already been provided to Sanborn so they can plan for packaging/shipping. • If you didn’t respond to the order email, I used your 2016 order as a guide. • You’ll get one more opportunity to review your order (September 2018) to make any last minute changes. • The full area might be delivered later after everything else.
Click to edit Master title style Supplemental Imagery Click to edit Master title style • Partners received quotes in mid-June 2017 that • RFP in January 2018 for compared: supplemental streaming • Resolution • Flight timing services. • Estimated delivery dates • Cost • Coverage • Google (via Sanborn) won • Positional accuracy the evaluation, but the • QAQC Procedures consortium voted (96%) to • Deliverables • Trial availability not pursue that solution. • Access to historical imagery • Licensing • Support for derivatives (e.g. planimetrics) • Google had the most interest. • Not enough interest in any option to fund it.
Click to edit Master title style Supplemental Imagery Click to edit Master title style • What have I learned from these exercises? • Past off-year imagery (i.e. 2017) is not enticing. • Partners want fast turnaround time on current imagery. • The supplemental options available to us are lacking, either: • Not the right time period of capture • Slow turnaround time • License terms that don’t work for us • Partners’ needs for supplemental imagery are more varied than for the primary imagery (DRAPP)… so we are having a harder time determining a suitable solution. • Discussion questions • Is the DRAPP 2018 interim imagery WMTS satisfying the need for quick turnaround on current imagery? • Does our project still need a supplemental source? If so, what kind?
Click to edit Master title style Upcoming Milestones Click to edit Master title style • Pilot review June 18 • Reach out if you want to be involved! • Mountain flight window June - July 18 • If surveying panels, do so by the end of May! • Processing & QAQC Fall 18 • Be ready to take on your QAQC assignment! • Deliveries & partner invoicing (#2) Dec 18 • Check your email for order confirmations and invoices!
Click to edit Master title style Communication Schedule Click to edit Master title style • Meetings (est. at major milestones): • Kickoff – May 2017 ✓ • Update (specs) – August 2017 ✓ • Update (spring flights) – May 2018 ✓ • Update (summer flights) – August 2018 • Wrap up – March 2019 • Most project communication will come to you via email and will include: • Letters of Intent – September 2017 ✓ • Invoices – March 2018 ✓ and December 2018 (or at your request) • Flight status – multiple throughout spring and summer 2018 • WMS credentials – spring 2018 ✓ and winter 2019 • Custom order information – spring 2018 ✓ • Polls – as needed
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