NEARC Fall 2016 has ended
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Technical Session [clear filter]
Tuesday, October 18


Technical Session. Extracting 3D Features from Publicly Available LiDAR Data
AUTHORS: Kris Berglund, Blue Marble Geographics

ABSTRACT: As LiDAR data permeates the mainstream, its use and utility is becoming much more widespread and diverse. As a spatial commodity, LiDAR is the raw material from which a wide variety of 3D datasets are generated. Using a series of customizable algorithms applied to the geometric structure and other attributes of the point cloud, buildings, vegetation, utility cables, and other features can be effectively identified, classified, and ultimately extracted into vector models of the features they represent. Subsequently ground points can be isolated and gridded to form an accurate terrain model as the basis for precise volumetric calculation, terrain analysis, and change detection. In this workshop, we explore the workflow whereby features are identified and extracted from publicly available data. We walk through the procedures for point cloud filtering and noise removal; identification and automatic reclassification of ground points; 3D building model creation; height calculation of forest canopy and individual trees, and delineation of above-ground utility cables. We will also demonstrate the workflow for manually digitizing identifiable objects in a 3D environment.

Tuesday October 18, 2016 10:30am - 12:00pm


Technical Session. Creating a 3D GIS Program in the City of Cambridge
AUTHORS: Jeff Amero, City of Cambridge

ABSTRACT: The City of Cambridge has been working on integrating 3D into the GIS workflow for the past several years. Many of the technical challenges of working with 3D maps have improved significantly as both GIS software and computer hardware have evolved. The Cambridge 3D project has focused on 3D data development, internal workflow within City departments, interactive mapping, and a 3D Web page with data download capabilities. The City now has a plan in place for data maintenance and for developing a 3D city map which will be integrated with 2D GIS and related tabular data. In this presentation we will look at all aspects of building a 3D model, collaborating with our Community Development Department, creating a workflow for both staff and the developer community, building a 3D program within the GIS framework, getting 3D out to the public, and the road ahead.

Tuesday October 18, 2016 1:30pm - 2:00pm


Technical Session. 3DEP - 3D Elevation Program
AUTHORS: Dan Walters, US Geological Survey

ABSTRACT: The primary goal of 3DEP is to systematically collect enhanced elevation data in the form of high-quality light detection and ranging (lidar) data over the conterminous United States, Hawaii, and the U.S. territories over an 8-year period. Interferometric synthetic aperture radar (IfSAR) data will be collected over Alaska. A 2015 USGS Broad Agency Announcement (BAA) established a competitive solicitation procedure for partnering with federal agencies for lidar acquisition. So far 3DEP has provided funds in partnership with 54 projects yielding over 200,000 sq. mi. of high-quality elevation products. This presentation will describe the program, review its impact on the northeast and highlight the tools used to make the program successful.

Tuesday October 18, 2016 2:00pm - 2:30pm


Technical Session. Historical Data Visualization for Contaminated Sites - In 3D and Online
AUTHORS: Kelsey Lanan, Katie Budreski, Dan Voisin, David Healy - Stone Environmental

ABSTRACT: Data visualization is an indispensable tool for understanding the nature and extent of contamination at contaminated sites. Such sites, especially large and heavily contaminated areas like superfund sites, have often been studied for long periods of time, and have decades’ worth of historical data for contaminant concentrations in soil, water, air, etc. Unfortunately, these data are often contained in myriad reports, maps, and files in various formats, from multiple labs and companies, and with varying degrees of legibility and data completeness. In addition, it is difficult to visualize years’ worth of data (often hundreds of samples) on traditional static maps, especially when the contamination at many sites is a complex 3-dimensional problem involving geology, groundwater flow, multiple contaminants, and multiple sources of contamination. To solve all of these problems, Stone Environmental has developed a systematic way of compiling all historic data into a single comprehensive site database and visualizing that data in 3D models and with ArcGIS online. These tools allow us to visualize highly complex and detailed sites in intuitive and data-rich formats that are easier to use, share, understand, and present than traditional methods.

Tuesday October 18, 2016 2:30pm - 3:00pm