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Uses of LiDAR Derived Data Products at WVDEP. West Virginia Association of Geospatial Professionals Conference May 9, 2012. Introduction. - PowerPoint PPT Presentation
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Uses of LiDAR Derived Data Products
at WVDEP
West Virginia Association of Geospatial Professionals Conference
May 9, 2012
2
Introduction WVDEP’s TAGIS Unit established a rigorous in-house QC review and editing workflow and
successfully produced derived data products (“deliverables”), including:o Intensity image o Breaklineso Digital elevation model (DEM)o ESRI elevation grido Hillshadeo 100 foot contourso 20 foot contourso Slope and aspect datasets
Currently, there are deliverables still under construction, these are:o Contiguous, watershed-size 2 foot contour dataseto Vegetation canopy height dataset may yet be initiatedo Building footprints dataset
The .LAS files covering the first deliverable area were provided to West Virginia View where they were recently made available to any interested party for download.
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Received Deliverables from NRAC Three
deliverables so far
Deliverable are watershed-based
1st2nd
3rd
*Natural Resource Analysis Center
*
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QC CheckingStatus 1FEMA’s QC Contractor Dewberry 1WVDEP
First Second 1st Deliverable
Passed N/A Completed
2nd Deliverable
Failed2 In progress Completed
3rd Deliverable4th Deliverable1FEMA contracted Dewberry to look at only 5% of tiles for micro errors. TAGIS’ QC process looks at all tiles in NRAC’s deliverables. 2 An automatically but incorrect adjustment in elevation by NRAC’s production software produced an error they discovered in tiles for McDowell County after submittal of 2nd deliverable to Dewberry. Corrected dataset is expected for delivery to WVDEP the week of May 6th, 2012.
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Derived Data Products ProductionProduct 1st. Deliverable 2nd. DeliverableIntensity Image CompletedBreaklines Completed In productionDigital Elevation Model (DEM)
Completed
ESRI Elevation Grid CompletedHillshade Completed Draft Completed100’ Contours Completed20’ Contours Completed2’ Contours Nearly Completed1
Slope CompletedAspect CompletedBuilding footprints Not StartedVegetation canopy Not Started1Aggregates (22 blocks created from 2144 tiles) were created but attempts at editing along edges crashes ArcGIS. Planned May onsite collaboration with Virtual Geomatics technical staff to produce a contiguous dataset.
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LiDAR Derived Hillshade
Results of completion of the project’s first large, multi-county size hillshadeo Expected uses several now confirmed
• Subsidence• Portals• Refuse piles• Slips
o Unexpected uses only one confirmed but it’s a biggie!
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LiDAR Derived Hillshade subsidence
Major opening Related Sinks123
12
3
Meters
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Salt was King before Coal Only 8 miles from WVDEP’s headquarters is
the town of Malden, WV. In Colonial America, salt was rare and very
expensive. From 1806 to 1808, in present day Malden,
David and Joseph Ruffner developed the world's first deep well drilling process.
That area became known as the "Kanawha Salines“, a very wealthy industrial region on the frontier.
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Salt Created the 1st Market for Coal It was in connection with the salt industry that
the coal industry of the Great Kanawha Valley was started.
John P. Turner, a New Yorker, discovered coal there and opened a mine in 1817 for the purpose of supplying the Kanawha Salines’ furnaces 600,000 bushels of salt were produced in 1814.
Professor William Barton Rogers, University of Virginia, reported in 1840 ninety furnaces along the Kanawha Rivero They made annually a million bushels of salt and …o consumed five million bushels or two hundred thousand
tons of coal.
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Coal and River Corridors Coal fired keelboats distributed salt in the Ohio
Valley, the Mississippi Valley, and throughout President Jefferson's new Louisiana Territory.
Salt was not the only commodity carried on our region's rivers as markets for coal opening up elsewhere resulted in its serious export too.
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What started it all … info about a nearby pre-Civil War - 1910 mine never located in the field
DEP’s
HQ
LiDAR Derived Hillshade portals
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Hillshade and Suspected Portals … on a Roll
Green vectors are West Virginia Geologic and Economic Survey’s coal outcrop dataset
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Another Hillshade, Suspected Portals and Coal Outcrop Example
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Hillshade and Old Mine Map Alignment
Use of the LiDAR derived hillshade to adjust scale and orientation of scanned mine maps was totally
unanticapted!
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Going a Little Off the Deep End Portal Wise …
Within an 8 mile radius of DEP’s Headquarters … more than 800 suspected old portals were found in just a few hours of looking.
None are in the AML Inventory.
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Hillshade and Traces of the Past
Walnut Grove was a pre-civil war plantation owned by the Summer family.
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Hillshade, History and Archeology
Walnut Grove Area
The new hillshade dataset also
clearly shows the old trail system used by settlers
and Native Americans
sometimes called the Mary Ingles
Trail.
The site of log cabin.
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Other Discoveries Using Hillshade Landslides
Wildcat mines
Underground mine fires
Logan Airport
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LiDAR Derived Hillshade difference grid
Wyoming County has two LiDAR datasets
2003 FEMA 2009 WVDEP
Fills
Cuts
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Public Access to LiDAR and Derived Datasets
.LAS files now downloadable by any interested parties from West Virginia View.
April roll out of an aggregated hillshade dataset from TAGIS’ Mining Data Tools.
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Aggregated Hillshade and
WVSAMB
WVSAMB photogrammetrically-based hillshade is above and left of green lines. WVDEP’s LiDAR-based hillshade elsewhere
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