Cloud-Sourcing: Using an Online Labor Force to Detect Clouds and Cloud Shadows in Landsat Images
Received: 15 December 2014 / Revised: 19 January 2015 / Accepted: 10 February 2015 / Published: 26 February 2015
Abstract: We recruit an online labor force through Amazon.com’s Mechanical Turk platform to identify clouds and cloud shadows in Landsat satellite images. We find that a large group of workers can be mobilized quickly and relatively inexpensively. Our results indicate that workers’ accuracy is insensitive to wage, but deteriorates with the complexity of images and with time-on-task. In most instances, human interpretation of cloud impacted area using a majority rule was more accurate than an automated algorithm (Fmask) commonly used to identify clouds and cloud shadows. However, cirrus-impacted pixels were better identified by Fmask than by human interpreters. Crowd-sourced interpretation of cloud impacted pixels appears to be a promising means by which to augment or potentially validate fully automated algorithms.
Interactive Virginia Tech map offers customization, rich data layers, ease of use
BLACKSBURG, Va., Aug. 15, 2013 – A newly released interactive campus map offers a highly-customizable tool for finding specific buildings, discovering accessible routes, and exploring the Virginia Tech campus in new ways.
The map is the result of collaboration between Virginia Tech’s Enterprise Geographic Information Systems, University Relations, Facilities Services, and the Office of Equity and Access. The map was designed for use on mobile devices or in standard browsers, and includes a new high-resolution aerial photography layer in addition to the familiar color-coded Virginia Tech campus map. The mapping tool facilitates the location of campus points of interest, and provides rich new features that make it easier to get around by bus, bike, car, on foot, or using assistive devices.
Enterprise Geographic Information Systems provides community access to statewide aerial imagery
BLACKSBURG, Va., Aug. 13, 2013 – Through a partnership between Virginia Tech's Enterprise Geographic Information Systems and the Virginia Geographic Information Network (VGIN), the university and community now has access to a locally-hosted copy of the entire archive of the Virginia Base Mapping Program’s aerial imagery of the Commonwealth of Virginia.
The server is available at http://garden.gis.vt.edu, and is available to students, faculty, and the general public.
Virginia Tech is able to provide this resource through VGIN’s Geospatial Archive Resource and Data Exchange Network (GARDEN).
"Game Day" GIS Application Improves Stadium Security for Home Football Games
September 6th, 2011 - A new Geographic Information Systems (GIS) application for event management was tested at the first home football game in Lane Stadium on the Virginia Tech campus. This application, which allows police and emergency responders to digitally track and view security and safety activities using a web-enabled, spatial platform, was developed by Seth Peery, Sr. GIS Architect for Enterprise GIS; Mahesh Narayanamurthi, Industrial and Systems Engineering graduate student; Luke Ward, Technology Manager; and Richard Phipps, Systems Administrator, all working under the department of Converged Technologies for Security, Safety and Resilience reporting to the Vice President for Information Technology, Erv Blythe. The map displays GIS layers for incidents, rescue squad and police resources, stadium seating location references, and interior space floor plans overlaid on top of an aerial view of the stadium and surrounding areas.
Enterprise GIS Software Training
Upon request, we will provide training to departments on the server-side GIS products that we manage (ArcGIS Server, ArcSDE, Google Maps, Google Earth Enterprise).
We are offering a number of short courses through the Virginia Tech Networked Learning Initiatives this Spring.
» NLI campus resource sessions
Important information regarding the university's password change
Enterprise GIS users,
As all of you have no doubt been made aware through multiple channels over the past few months, the University is requiring all students, faculty and staff to change their PID, HOKIES domain, and Oracle passwords by July 1. If you've not changed your password by July 1 (and have not changed it since July 1,2010), you'll be temporarily locked out of systems that depend on these credentials (e-mail, exchange, domain logins, etc.). Please see http://www.awareness.security.vt.edu/ for more detailed information on the password change initiative.
FutureForward Blacksburg is the name of the application submitted by the Town of Blacksburg, VA to Google for their fiber to the home experiment, "Think Big with a Gig". The video was prepared by the VTGIS group at Virginia Tech during the month of March 2010 and illustrates a number of applications that citizens and businesses in the Town can use gigabit ethernet for and develop innovations around.
Virginia Tech’s Vice President of Information Technology announces launch of Enterprise GIS website
BLACKSBURG, Va., March 26, 2009 – Today Virginia Tech’s Vice President of Information Technology, Erv Blythe and the Enterprise GIS group announced the launch of their website, www.gis.vt.edu.
The website establishes an online presence for the newly created Enterprise GIS group within IT, and contains information, tutorials, tools and software geared towards the needs of university researchers, administrators, and related partners interested in integrating Geographic Information Systems (GIS) analysis or visualization tools into their activities.
The Enterprise GIS Group provides centralized storage and hosting of GIS data, web mapping applications hosting and design assistance, and a centralized base map for the campus and the Commonwealth of Virginia.
» See full Press Release