VCGI Notice Regarding Heartbleed Vulnerability Bug

April 22, 2014

You might be aware of a widespread software vulnerability named Heartbleed, which has affected a large number of servers on the internet.

We want to let you know that VCGI’s website (, web map services (, and mapping sites ( are not vulnerable to the Heartbleed bug. We have come to this conclusion by reaching out to our vendors to determine if any of their software products are vulnerable to the Heartbleed bug.

For more general information on Heartbleed, visit

VCGI Update

April 14, 2014


Request for Information posted re: VT Open GeoData Portal:

The VT Center for Geographic Information (VCGI) currently hosts Vermont’s Open GeoData Portal (herein referred to as the GeoData Portal), which allows users to access and use geospatial information and services. This Request for Information (RFI) is designed to gather information from geospatial technology providers regarding the development of a new VT Open GeoData Portal. The results of the RFI may or may not lead to the release of a Request for Proposals (RFP).

The full RFI has been posted here

NOTE: All questions related to this RFI should be emailed to by April 28, 2014: 3PM EST. All questions and associated responses will be made publicly available by May 5, 2014: 3PM EST on VCGI’s website.

All 2013 Orthoimagery has been posted:

Ortho imagery covering the northwest portion of the state as well as the Barre-Montpelier area was collected in the spring of 2013. All of the northwest corner was collected in 4-band color infrared as well as black and white with .5 meter pixels. Additionally, much of Chittenden County was collected at a resolution of .15 meter pixels, with the more mountainous eastern edge of the county being collected at .2 meter pixels.  The Barre-Montplelier area was collected as a resolution of .3 meter pixels.  More info here:

Mapping it up in VT and NH (webinar) scheduled:

VT and NH both have powerful, newly updated online map viewers.  While each viewer is customized to the state’s GIS resources, they share a common framework and much of the same functionality.  Come for a tour of the new interface(s), layers and tools for both viewers. Participants in this webinar will learn how to make maps from the layers provided by VCGI and NH GRANIT, add your own data to the maps, save your map as an image or to print, and more.

Date:  Wednesday, April 30, 2014

Reserve your Webinar seat now at:

Grants Awarded for Northern VT Parcel Mapping!

March 24, 2014


14 towns will receive funding from VCGI…

The Northern Border Regional Commission, whose focus is to help address the community and economic development needs of the most severely distressed portions of the Northern Forest region, awarded VCGI a grant for $169,100 in late 2013. The purpose of the project is to provide support to a subset of towns in Vermont’s Northern Border Region so that they can successfully contract with the private sector for the creation or update of parcel data for their town that meets the VT GIS Parcel Data Standard. Planning for a successful economic future in Vermont’s Northern Border Region requires visualizing current and future conditions. Maps are a vital tool in that process, and many towns in the region are hampered by old, inaccurate, or absent parcel maps. Modern mapping requires digital map data (also called GIS data) from a variety of sources, including municipal tax maps – the source of parcel data.

VCGI and its Regional Planning Commission Partners (NRPC, LCPC, NVDA) are looking forward to working with the following towns to support their effort to create or update and improve their parcel data: Derby, Troy, Jay, Glover, Holland, Waterford, Burke, Enosburg, Berkshire, Franklin, Sheldon, Wolcott, Eden, and Elmore.  In addition to providing about $160,000 worth of financial support, RPC and VCGI staff will provide technical specifications, template documents to guide the towns through a Request for Proposals process (in some cases), a mapping contract template, and support drafting a plan for future data maintenance to keep the data useful into the future.

This project is part of a larger effort to develop a statewide parcel data program in VT to ensure up-to-date, consistent, and useful parcel data is developed and maintained for all towns. The VT Enterprise GIS Consortium oversees that effort.

For more information: or 802-882-3002

VT Parcel Boundary Map Service Now Available!

February 13, 2014

Leslie Pelch, VCGI


VCGI has posted a Parcel Boundaries Web Map Service that will be updated at least annually as we receive updated parcel data. Web map services allow users to bring map layers and imagery into their GIS projects or map mashups without actually downloading any data by connecting to the service of choice via the internet.

Contact Leslie ( or 802-882-3002) if you need help understanding how to connect to this service. More info here:


VCGI Winter Webinars: LiDAR and Raster Topics!

January 23, 2014

Introduction to the Vermont LiDAR Initiative


Know Your LiDAR Data


Unlocking LiDAR Data for Use In Public Work Projects


Tips on Working with Raster Data in ArcGIS






Vermont LiDAR Initiative Data Announcement

January 2, 2014


Mike Brouillette, VCGI

With technical support from our partners in the Enterprise Geospatial Consortium LiDAR Workgroup (a.k.a. VTeam LiDAR), VCGI is happy to announce the initial offering of LiDAR “derivative data” under the umbrella of the “Vermont LiDAR Initiative” effort. For more information on the effort, the state LiDAR plan, status graphics and other support data please visit the new VCGI LiDAR web page at

Current data availability includes 1.4m resolution Digital Surface Models (DSMs) “ElevationOther_DSM1p4m” and Digital Elevation Models (DEMs) “ElevationDEM_DEM1p4m“ covering the Missisquoi subbasin and a majority of Bennington County. 2’ Contours from these areas will be integrated with the existing 2’ contour layer “ElevationOther_CN2T” early in the New Year. See the LiDAR web page for status graphic, project data extents and more.

To download these data select the “download” icon located in the “All new or updated data” of the “Data and Imagery” page All LiDAR raster data is in the Erdas Imagine file format and organized at two levels for flexibility in downloading:

1) Ortho 9 tiling scheme; and

2) Original project “footprint” extent – as delivered by vendors.

Index maps and Index shapefiles are provided in the download data folders to help users find tiles of interest, e.g., “_Index_ElevationDEM_DEM1p4m.pdf” and “”.


For a readily available advocacy/information brochure please see the “VT LiDAR Initiative Brochure” on the web page.


  •  Addison County Data – Release of the data is still pending QAQC issues with the vendor. No firm delivery date is available.
  • Essex County Data – Missing data tile discovered upon regenerate DEM & DSM from source point cloud has slowed release of this extent. Efforts underway to recover it and move forward. Original vendor delivery only included a 3m resolution DEM/DSM though data supports 1m resolution, thus the recreation effort. IF YOU THINK YOU HAVE THE ORIGINAL “POINT CLOUD” SOURCE DATA FOR 2005 ESSEX COUNTY PLEASE CONTACT ME!
  • ALL-LDR Product – External hard drive containing all available LiDAR data including “point cloud” and all derivatives. For information and links to vendor supplied “point cloud” metadata see -
  • Secondary derivative layers: “ElevationOther_ASPECT1p4m”, “ElevationOther_HILSH” (hillshade), “ElevationOther_nDSM” (“normalized” DSM) and “ElevationSlope_SLOPE” raster layers will be made available via the VGIS as time permits in 2014. These are available on the ALL-LDR product for project extents they have been generated for (ATM: Missisquoi subbasin and Bennington County).

Please feel free to contact me directly with questions and/or feedback about the data, the VT LiDAR Initiative or the LiDAR web page etc: or 802-882-3008

Democracy Depends Upon Access to Government Geodata

December 12, 2013

From Sensors and Systems:



“Is my property being taxed fairly?”
“Are zoning variances being granted in a consistent manner?”
“Is my flood insurance rate justified?”


These are the types of questions concerned citizens may ask, both in their own interest, and in the interest of maintaining a responsive and equitable democracy. Our democratic system of government is supposed to conduct the public’s business fairly and consistently within the explicit directives of the citizens’ elected representatives. But how can citizens know if that is happening? And how can citizens know that their representatives are actually conducting “the people’s business” rather than their own? Transparency is required for maintaining our governments’ accountability to its citizens.


Transparency means giving citizens access to their governments’ records, to the same information that government agencies themselves use to make decisions and conduct operations. With it, interested persons can understand, verify, and possibly challenge a governmental action. Since most governmental actions impact specific locations, geographic information is critical to governmental accountability, and GIS technology and professionals are critical to analyzing that information.

- See more at:


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