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Alaska DEM Workshop George Y. G. Lee Anchorage, Alaska July 2008.

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Presentation on theme: "Alaska DEM Workshop George Y. G. Lee Anchorage, Alaska July 2008."— Presentation transcript:

1 Alaska DEM Workshop George Y. G. Lee Anchorage, Alaska July 2008

2 2 Outline Why elevation is important to USGS National Digital Elevation Program (NDEP) The National Map and elevation data Lidar activities and Lidar for the Nation Alaska requirements and National Elevation Plan

3 3 Importance of Elevation Data to the Nation USGS responsibility as A-16 data category Value of nationally, consistent elevation data set Importance to the Digital Orthophoto Program, including Urban Area data for Homeland security Importance of elevation data to the commercial satellite companies Importance of higher resolution elevation data to USGS science programs, especially climate change studies

4 4 USGS Data Requirements A-16 responsibilities (hydro, elevation, orthoimagery, and names) The National Map needs Other USGS Discipline missions (Geology, Water Resources, BRD) Science Program (i.e., climate change)

5 5 USGS Elevation Data Acquisition Ancient past (completion of 1:24K series and DOQ first coverage) Recent past (10-meter DEM partners) Current priorities (Hazards, 10-meter partners, Urban Areas) Future priorities (data maintenance, hi-res DOQs, other agency needs and partnerships, emergency response, and science programs)

6 6 NDEP Established to promote the exchange of accurate digital land elevation data among government, private, and non-profit sectors and the academic community and to establish standards and guidance that will benefit all users Federal (11 agencies), State (NSGIC Rep) Open Invitation to participate Organization - Steering Committee, Technical Subcommittee, Project Coordination Subcommittee

7 7 National Digital Elevation Program BLM FEMANASA NGA NOAA NRCSUSFSUSGSUSACE NSGIC A consortium of agencies coordinating the collection and application of high-resolution, high-accuracy elevation data USFWS US Census

8 8 NDEP Goals Enhance data sharing among Federal, State, and local agencies; the private sector; and academia Minimize redundant data production Leverage resources to satisfy multiple requirements Develop flexible standards that meet the needs of most users Ensure the availability and accuracy of digital topographic data

9 9 Technical Subcommittee Dean Gesch, USGS Forum for information exchange Standards development Technology assessment

10 10 Standards Development USGS 30-meter DEM standard Guidelines for digital elevation data – best practices Inventory of agency-specific specifications and standards USGS FEMA NOAA Others Framework Elevation Standard ASPRS Lidar Guidelines

11 11 Project Coordination Subcommittee Bryon Ellingson, USGS Project Tracking System Project Information Form Minimal Elevation Specific Metadata set Viewer View w/ Query tools GOS Harvestable (supports Module 3), Link with RAMONA and FEMA MIP activity

12 12 NDEP Project Tracking

13 13 ROMONA FEMA supported, Paul Rooney NSGIC pockets of interest Is it being used? Why and why not?

14 14

15 15 NDEP Mode of Operation Signed Charter NDEP Organizational Structure, Chairperson, Executive Secretary Meetings and telecons Public website update and maintenance Quickplace website for internal communications

16 16 New Directions for NDEP Focus on coordinated elevation data acquisition and maintenance of a national database Support new budget initiatives Develop National Elevation Plan

17 17 USGS Research and Applications Activities Limited basic research Limited applications within Geography and GIO Limited multi-discipline cooperative research Limited development and testing with Corp of Engineers Research primarily in support of data acquisition, derivative products, and production systems development Accuracy and comparison of new acquisition methods No other recall of any cooperative research with other agencies

18 18 Agency Issues and Concerns Lack of data maintenance program Not meeting needs of other Federal agencies Lack of National Elevation Program Plan Lack of adequate funding Licensed data model Lack of quality assurance guidelines for sensors and data acquisition

19 19 ElevationElevation Geographic NamesGeographic Names HydrographyHydrography Land CoverLand Cover OrthoimageryOrthoimagery Boundaries (Government Units)Boundaries (Government Units) StructuresStructures TransportationTransportation The Nation Map

20 20 Age of USGS topographic maps in the National Elevation Dataset (NED) Vintage of Elevation Data Terrain data in USGS topographic maps are on average 35 years old

21 Multi-Resolution NED 1 arc second1/3 arc second1/9 arc second

22 22 Feature Extraction: B

23 23

24 24

25 25 The National Map Needs: The National Map needs higher resolution elevation dataThe National Map needs higher resolution elevation data The National Map needs up-to-date elevation dataThe National Map needs up-to-date elevation data The National Map needs lidar data to map other map category featuresThe National Map needs lidar data to map other map category features Not “Lidar for the Nation” but rather “National Elevation Program”Not “Lidar for the Nation” but rather “National Elevation Program”

26 26 David J. Harding NASA Goddard Space Flight Center National Lidar Mapping Initiative: A Medium-Altitude Advanced-Technology Implementation Concept

27 27 National Academy of Sciences Recommendations: FEMA Floodplain Mapping & Earth Sciences Decadal Survey Two NRC Committee Reports Issued in January, 2007 Earth Science and Applications from Space to Advise NASA, NOAA and USGS Global topo & vegetation structure 5 m spatial resolution 0.1 m vertical precision for ground Launch time frame: Floodplain Mapping Technologies Commissioned by Congress to Advise FEMA Elevation for the Nation Nationwide, seamless, consistent, public- domain, elevation data set created using airborne laser swath mapping (ALSM) Contours: 1 ft (low relief), 4 ft (high relief) LIDAR Surface Topography (LIST) Update 10 m & 30 m NEDUpdate 30 m & 90 m SRTM

28 28 Carbon / Biomass Urban Response Coastal Inundation Wildland Fires Hydrologic / Hydraulic Volcano Monitoring Land Cover Earthquake Faults A Wealth of Information Derived from Lidar State-wide lidar mapping completed or in progress

29 29 Low Altitude (1 to 2 km) Imposing Narrow Swath (~ 1 km) Local (<20 km) Kinematic GPS INS+GPS Attitude (0.01°) Single Beam and Detector Incomplete Reference Frame Ad Hoc Error Analysis Current Geoid for Ortho Heights High Altitude (e.g. 15 km) Enabling Wide Swath (e.g. 10 km) Regional (e.g. 1,000 km) PPP GPS INS+StarCamera Attitude (0.001°) Multiple Beams and Detectors Rigorous Reference Frame Systematic Error Analysis Concurrent Aerograv for Better Geoid Approaches to Accomplish National Lidar Mapping Utilize Existing Capabilities Invest to Advance Capabilities ±

30 30 Potential Scenarios to Accomplish National Lidar Mapping Scenario 1: compete coverage by existing capability no use of advanced capability Scenario 2: complete coverage by existing capability continental datum tie-lines using advanced capability Scenario 3: logistically easier areas mapped by existing capability logistically challenging areas mapped by advanced capability Scenario 4: Conterminous U.S. mapped by existing capability Alaska mapped by advanced capability Scenario 5: local high-resolution mapping by existing capability complete coverage by advanced technology capability Increasing Role for Advanced Capability

31 31 The selection of an implementation scenario should be driven by which maximizes total benefit for the nation: Quality and uniformity of the resulting data and products Time-frame over which the job is completed Cost to complete the job Capabilities and infrastructure established while doing the job Advancement of the U.S. mapping and remote sensing industries Suitability for continued mapping for change detection and map updating Decision Factors for National Lidar Mapping +

32 32 USGS: project leadership and management Local, state and federal agencies: requirements and standards for lidar data & DEM products meeting their mandates NASA: integrate and test medium-altitude airborne lidar instrumentation implement data processing methods & infrastructure provide instrumentation and infrastructure for operation by commercial sector Commercial Sector: acquire and process medium-altitude, nation-wide data acquire and process low-altitude, higher-resolution data for high-priority areas and for QC/QA produce derived parameters using classification & feature extraction procedures produce DEM products TINs, DSMs, DTMs, canopy structure, building shapefiles create and market value added products NASA and USGS: QA raw data, derived parameters and DEM products USGS: archive and distribute raw data, derived parameters and DEM products Local, state and federal agencies: use derived parameters, DEM products & value added products to meet their mandates National Lidar Mapping Initiative Concept: Potential Partner Roles

33 33 Partners interested in National Coverage The concept of a national Lidar survey was explored at a September 2006 meeting NASA, USGS, NOAA, Association of American State Geologists NASA, USGS, USACE, NOAA, NGA, FEMA, NRCS, Forest Service, and other Federal agencies already collect Lidar data Growing interest in a full return Lidar baseline dataset for the nation to meet multiple requirements

34 34 Next Steps for the Lidar Effort Establish USGS Advisory Committee Define strategy Provide periodic review Invite other agency participation Define requirements Propose national program plan Define specifications

35 35 Proposed FY 2010 Budget Good news is: $$ M for mapping and integration Includes $ M for Liar Bad news is: Mapping is only part of $$$ M over target initiatives within DOI

36 36 Need for a National Elevation Plan GeoLOB Bureau Data Resource (data call): Impact on Federal agencies A-16 Performance Reporting for National Spatial Data Infrastructure Data Themes Lidar for the Nation (Background, Workshop Summary, Future Plans) Development of National Elevation Plan

37 37 Summary Alaska needs good elevation data Alaska needs DOQs Alaska seems to be neglected Alaska IS different Not a single solution Complex project management and QA issues Alaska elevation needs should be a part of the National Elevation Plan Public domain is still a general requirement

38 38 Thanks Questions???

39 39 Contact information: George Lee, ,


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