Pamap program Lidar lidar workshop April 21, 2008

PAMAP Program LiDAR

• LiDAR Workshop - April 21, 2008

What is PAMAP and PAMAP LiDAR?

• PAMAP is the digital base map of the Commonwealth of Pennsylvania.

• PAMAP is being created as a seamless, consistent, high-resolution set of digital, geospatial data products and associated services.

• The map is being compiled from new high-resolution aerial photography and elevation data, and from existing digital map resources developed by state and federal agencies, counties, regional agencies, and municipalities.

• Envisioned in 2001, with operations starting in 2002

What is PAMAP?

• Digital orthoimagery

• LiDAR point clouds

• LiDAR-derived products – DEM, contours, and breaklines

• Land Use/Cover

• Building/Structure data where not provided by partners

• PennPilot historical aerial photographs

Collaboration

• PAMAP is part of the USGS National Map

• PAMAP Cooperative Agreement established with 55 of the 67 counties

• PAMAP is funded primarily by the PA Department of Conservation and Natural Resources (DCNR), with contributions from other state agencies, and USGS and FEMA

• The PAMAP Program is managed by agreement between DCNR and Penn State University

How Did LiDAR Come About?

• The topographic mission of the Bureau of Topographic and Geologic Survey

• Desire for very accurate terrain statewide

• Recognition of the importance of LiDAR data for many mapping, planning, management, and monitoring efforts

How Did LiDAR Come About?

• Estimated costs falling

• Proposal to combine orthoimagery and LiDAR efforts

• Study of synergies among imagery and LiDAR efforts

• Independent review of proposals and synergies

• DCNR providing funding

45,000 sq. mi., approx. 15,000 sq. mi. per year

PAMAP LiDAR Approach

• PAMAP elevation data is framework data

• LiDAR is the basis for elevation framework data

• Flooding is Pennsylvania’s No. 1 hazard

• Need to address flooding data needs
• Follow FEMA’s specifications for LiDAR data, but not all MapMod requirements

• Manage Expectations

PAMAP LiDAR Program

• What is LiDAR?

PAMAP LiDAR Program

• PAMAP LiDAR Characteristics

LiDAR Specifications

• Post spacing – 1.4 meters

• Vertical Accuracy

• 18.5 cm open areas – 0.61 foot
• 37 cm forested/vegetated – 1.2 foot

• Classification

• LiDAR data in LAS format
• Bare Earth (2) and Model Key (8)
• Model key for derived products
• Above Ground (1) and (12)
• Other classifications also used for smaller numbers of points

LiDAR Products

• Raw data retained

• LAS data with classifications

• Organized by PAMAP tile structure

• Derived products by PAMAP tile structure

• DEM – 3.2 foot (1 m) pixel
• Breaklines – from PAMAP orthoimagery
• 3D shapefile
• Contours – 2-foot C.I.
• 3D shapefile

LiDAR Points

LiDAR Points – Bare Earth

LiDAR Points – Above Ground

LiDAR Points – Bare Earth

LiDAR Points – Above Ground

LiDAR Points

Loyalhanna Gorge Ground Points

Loyalhanna Gorge Above-Ground Points

Residential Area Ground Points

Residential Area Above-Ground Points

DEM - Digital Elevation Model

Breaklines

Breaklines

Contours

Contours

Metadata

Quality Assurance

• Quantitative and qualitative review of LiDAR

• Quantitative review of imagery

• Independent vendor team

• GeoCue/URS DPMS used for multi-participant tracking all data/tiles

Quality Assurance

• Imagery and LiDAR have passed quantitative checks

• Qualitative review of 2006 LiDAR underway

How Will Users Get The Data?

• All PAMAP data distributed in the public domain

• Widespread distribution of final data

• Federal – USGS and FEMA distribution
• State
• Counties
• PASDA
• State Data Center

Distribution State/County

• A geospatial enterprise server architecture is established for state agencies

• All levels of government able to use database and services

• State agencies acquire copies of the data

• All Cooperative Agreement counties receive a portable hard drive with data

Distribution PASDA

• PA Spatial Data Access clearinghouse

• PAMAP data available without cost or use restriction

• Imagery
• DEM
• Contours

• FTP and web services available to anyone

• www.pasda.psu.edu

Distribution of LiDAR Point Clouds (LAS Data)

• Available from PA State Data Center

• Offline request only

• Requested data on portable hard drive or DVD

• Contact Data Center

• Email: [e-mail]
• Voice: [phone]
• FAX: [phone]
• Website: http://pasdc.hbg.psu.edu

What Are Users Doing With The Data?

• Land development

• Wind farm siting

• Floodplain mapping

• Landslide review

• Flood control

• Mining

• Education

• Geologic mapping

• Rescue

Landslide Review and Modeling

• PennDOT use of LiDAR for evaluation of landslides

• Jay, Thanks, the LiDAR information was exceptionally useful. It was much more detailed than we imagined which was great! We actually are using it on 2 emergency slide projects, one on SR 130 in Penn Hills where we have a road closed due to a slide about 200 feet wide by 800 feet long, the other is being used for rockfall remediation/removal on SR 28 in the Harmarville area where we have problems and recently had a fall where motorists were involved. The information is extremely useful especially when we don't have the luxury of getting survey as quickly as we need it. Again, Thanks.

• Joseph Schultz, District Geotechnical Engineer, PennDOT District 11

• Geologic Survey use of LiDAR for evaluation of landslides

Vegetation Analysis

• LandBase Systems Consistent Vegetation Relief & 3D VegVolume viewed in Google Earth

RETTEW Geologic Application

Mining

• PA DEP evaluating subsidence from longwall mining in western PA

• PA DEP Bureau of Abandoned Mine Reclamation evaluating LiDAR for use to replace project-specific flights and photogrammetric work

• I am IMPRESSED! I have been harping on coal mining consultants to get better surface contouring for some time now (they still just digitize the USGS 7.5 minute topo contours into ACAD). I argue that the accuracy standards and contour intervals are not good enough for the large-scale maps that they submit (usually 1:4800 or 1:2400). Now we can really get down to business. We can accurately map coal contours, confidently design erosion and sediment controls, do volumetric calculations, etc, etc. I cannot thank you enough.

• Scott Barnes, P.G., Moshannon District Mining Office

Corps of Engineers

• Clymer, PA - Flood Damage Reduction Project to design and construct flood control measures to protect Clymer Borough from flood related damages up to the 100-year level flood from Two Lick Creek and its tributary Dixon Run.

• Conemaugh Reservoir - Supplement PAMAP data with bathymetric surveys to build a complete terrain model for the reservoir.     

• Monongahela and Youghiogheny Rivers - Supplement PAMAP data with existing river sounding data to evaluate pool changes.  These evaluations include the effects of pool changes on properties along the rivers.

• East Branch Dam Break - Supplement PAMAP data with existing river sounding data as well as new bathymetric survey data to build a complete terrain model of the reservoir basin as well as a complete terrain model from East Branch Dam (East Branch Clarion River) to the confluence with Allegheny River continuing on the Allegheny River to Pittsburgh. 

Information

• PAMAP Program

• www.dcnr.state.pa.us/topogeo/pamap

• www.pamap.info

• Chris Markel

• [e-mail]

• 814-360-8406