Mapping from Space: Photogrammetry Using Commercial Satellite Imagery

Transcription

1 Mapping from Space: Photogrammetry Using Commercial Satellite Imagery An overview prepared for MAGIC 2012 Conference April 25, 2011 Ron Schonegg, Account Manager Steve Roberts, Survey Manager Mapping from Earth, Sky, and Space

2 Corporate Background Established in 1999 HeadquarteredinMadison Madison, WI Additional offices in Indianapolis, IN and Kansas City, MO Staff of ~25

3 Photogrammetric Capabilities Focus on primary geospatial data creation Aerial photography Satellite imagery Photogrammetric mapping Lidar acquisition and processing Aerial and mobile collection Imagery products Digital vector products Dt Data integration ti services Remote sensing data extraction Mobile lidar data of railroad tunnel

4 Who We Work For Federal Clients include USACE, USGS, National Park Service, USFWS, NGA DOTs: Experienced in 12 different state specifications Master Contracts with Wisconsin, Minnesota, Indiana, and Tennessee DOTs. Project for 12 other state DOTs including Texas Very High Accuracy: up to 005 vertical 0.05 accuracies County and Municipal government clients Private Manufacturing and Engineering Firms Utility Companies

5 Mapping from Space Commercial Satellite Photogrammetry: Moving to the Mainstream

6 History of High Resolution Satellites Oct. 6, 2009 WorldView-2 50cm 50-cm / 2.0-m Pan / 8-band MS Sept. 24, 1999 IKOOS 80-cm / 3.2-m Pan / MS Sept. 18, 2007 WorldView-1 50cm Pan Oct. 21, 2001 QuickBird 60-cm / 2.4-m Pan / MS Coming Soon. SPOT Pleiades 1 & GeoEye-2 late 2012 Sept. 6, 2008 GeoEye-1 50-cm / 2.0-m Pan / MS

7 Spaced Based vs. Aerial Mapping Platforms : : the clear cut distinction between satellite and aerial photogrammetry is disappearing Why Now?

8 Why Now? Processing Innovations Business i Solutions

9 Processing Innovations & Business Solutions Rational function model (or rational polynomial coefficient) for high res satellites stabilized and implemented in many photogrammetric software packages Provides the mathneeded to transform from image to object space in a geographic reference system (camera model)

10 Processing Innovations & Business Solutions Rapid adoption in many photogrammetric and Remote Sensing packages (2010) ENVI, ERDAS, BAE Socet Set, Datem, Intergraph, Others Standard d df formats for ephemeris wrap allowing for easy photogrammetric software ingest Help Available through software providers and photogrammetry/remote sensing community Body of recent comparative accuracy assessments

11 Processing Innovations & Business Solutions Commercial satellite firms (and others) adjusting tomeet need Pricing models in place to compete with aerial for many applications Customer focused order processing, monitoring, and delivery systems (kmz, start date, end date, off nadir restrictions, resolution, color/pan, cloud % limit, stereo/mono, ftp pull) Liability appropriately balanced between providers and photogrammetric buyers

12 Why use a Satellite instead of Aerial? Our job as photogrammetrists is to find solutions to build primary (foundational) geospatial data Satellite solutions now in the mix for many project designs Currency, Clarity, Contentdecisions

13 Moving it to Main Street Accuracy for many applications comparable / acceptable compared to aerial solutions Cost (collection and processing) sometimes advantageous Global Reach Access/Speed/Refresh

14 Common Satellite Services Orthoimagery Better clarity and/orcurrency than web based baseddata data Change Detection Algorithms guide user to potentialchanged area(s) Multispectral Including Near IR, and 4 additional bands Volumetric Studies Volume of pits and piles accurately measured in 3D Archival Imagery Less expensive than mission specific tasking

15 Brief Commercial Satellite Comparisons GeoEye 1 Resolution: 0.5 m Panchromatic & 1.65 m multispectral 4 bands total Swath width of 15.2 km minimum size order of 100 km 2 WorldView 1 Resolution: 0.5 m Panchromatic no multispectral Swath width of 17.6 km minimum size order of 64 km 2 WorldView 2 Resolution: 0.5 m Panchromatic & 1.82 m multispectral 8 bands total Swath width of 16.4 km minimum size order TBD Stereo coverage is only guaranteed on new orders!

16 Stereo Coverage

17 Workflow Mirrors typical Photogrammetric project Acquire stereo imagery Acquire suitable ground control Perform Absolute Orientation View/collect in stereo Auto correlated surface Output data in client format

18 Project Example Pipeline Corridor Quarterly Pipeline Monitoring (FERC required) pipeline miles, reaching into 3 states Baselinemappingfrom aerial inplace Need: change detection at 1/8 th acre cell size along 500 wide corridor Deliverables: change detection cells, ortho insets of change areas, plan mapping for changes within 200 corridor

19 WV2 Tasking Feasibility Study Weather + Competition + Accesses Estimated 45 days per season 15% or less cloud cover ~6 WV 2 strips

20 Example:WorldView 2 8 MS bands 2 m MS / 50 cm pan Swath ~16 km wide Extremely agile Stereo capable High XY accuracy 3 4 day refresh at 40N X, Y, Z RMSE s(w/ control) m m m

21 Change Detection Workflow 1. Image to to image registration Not completed in winter or 1 st 2. Resample to 1/8 acre pixels 3. Determine changed pixels Via 8 band weighed difference difference and thresholding Major shifts veg. to human made; made; human made made to veg. Work to minimize false negatives 4. Create polygon of changed pixels Chopped to 750/1,500 ft pipeline pp corridor quarter Iterative process Ideas to explore Season to season change detection Thematic class based change detection Additional ortho and plan map updates as required

22 Project Example Coal Pile Volume Mining site in Northwest NM totaling ~70 acres Goal: coal pile(s) volume calculations Used WorldView 2 05meter 0.5 panchromatic Deliverables: DTM surface in 3D, 2 contours, Volumetric report, and m digital it orthophotos h t Compared satellite collected DTM to aerial photography volume calculations within 1%

23 0.5 meter panchromatic ortho

24 2 Contours from DTM

25 Where we see opportunity Urban/ Infrastructure planning applications Regional scale change detection and monitoring Globalreach projects, usinggloballyavailable globally available ground control Opportunities are limitless! itl

26 Isometric view

27 Future?? Not yet Resolution is controlled by US govt restrictions

28 Thank You / Questions??? Ron Schonegg, Account Manager rschonegg@continentalmapping.com Steve Roberts, LS, CFedS Survey Manager sroberts@continentalmapping.com