Presentation on theme: "Uses of LiDAR Derived Data Products at WVDEP West Virginia Association of Geospatial Professionals Conference May 9, 2012."— Presentation transcript:
Uses of LiDAR Derived Data Products at WVDEP West Virginia Association of Geospatial Professionals Conference May 9, 2012
Introduction WVDEPs TAGIS Unit established a rigorous in-house QC review and editing workflow and successfully produced derived data products (deliverables), including: o Intensity image o Breaklines o Digital elevation model (DEM) o ESRI elevation grid o Hillshade o 100 foot contours o 20 foot contours o Slope and aspect datasets Currently, there are deliverables still under construction, these are: o Contiguous, watershed-size 2 foot contour dataset o Vegetation canopy height dataset may yet be initiated o 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. 2
Received Deliverables from NRAC Three deliverables so far Deliverable are watershed-based 3 1st 2nd 3rd *Natural Resource Analysis Center *
QC Checking 4 Status 1 FEMAs QC Contractor Dewberry 1 WVDEP FirstSecond 1 st Deliverable PassedN/ACompleted 2 nd Deliverable Failed 2 In progressCompleted 3 rd Deliverable 4 th Deliverable 1 FEMA contracted Dewberry to look at only 5% of tiles for micro errors. TAGIS QC process looks at all tiles in NRACs deliverables. 2 An automatically but incorrect adjustment in elevation by NRACs production software produced an error they discovered in tiles for McDowell County after submittal of 2 nd deliverable to Dewberry. Corrected dataset is expected for delivery to WVDEP the week of May 6 th, 2012.
Derived Data Products Production 5 Product1 st. Deliverable2nd. Deliverable Intensity ImageCompleted BreaklinesCompletedIn production Digital Elevation Model (DEM) Completed ESRI Elevation GridCompleted HillshadeCompletedDraft Completed 100 ContoursCompleted 20 ContoursCompleted 2 ContoursNearly Completed 1 SlopeCompleted AspectCompleted Building footprintsNot Started Vegetation canopyNot Started 1 Aggregates (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.
LiDAR Derived Hillshade Results of completion of the projects first large, multi-county size hillshade o Expected uses several now confirmed Subsidence Portals Refuse piles Slips o Unexpected uses only one confirmed but its a biggie! 6
Salt was King before Coal Only 8 miles from WVDEPs 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. 8
Salt Created the 1 st 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 River o They made annually a million bushels of salt and … o consumed five million bushels or two hundred thousand tons of coal. 9
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. 10
11 What started it all … info about a nearby pre-Civil War - 1910 mine never located in the field DEPs HQ LiDAR Derived Hillshade portals
Hillshade and Suspected Portals … on a Roll 12 Green vectors are West Virginia Geologic and Economic Surveys coal outcrop dataset
Another Hillshade, Suspected Portals and Coal Outcrop Example 13
Hillshade and Old Mine Map Alignment 14 Use of the LiDAR derived hillshade to adjust scale and orientation of scanned mine maps was totally unanticapted!
Going a Little Off the Deep End Portal Wise … Within an 8 mile radius of DEPs Headquarters … more than 800 suspected old portals were found in just a few hours of looking. None are in the AML Inventory. 15
Hillshade and Traces of the Past Walnut Grove was a pre-civil war plantation owned by the Summer family. 16
Hillshade, History and Archeology 17 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.
Other Discoveries Using Hillshade Landslides Wildcat mines Underground mine fires 18 Logan Airport
LiDAR Derived Hillshade difference grid 19 Wyoming County has two LiDAR datasets 2003 FEMA 2009 WVDEP Fills Cuts
Public Access to LiDAR and Derived Datasets.LAS files now downloadable by any interested parties from West Virginia View.West Virginia View April roll out of an aggregated hillshade dataset from TAGIS Mining Data Tools.Mining Data Tools 20
21 Aggregated Hillshade and WVSAMB WVSAMB photogrammetrically-based hillshade is above and left of green lines. WVDEPs LiDAR-based hillshade elsewhere
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