VT GIS Standard

Bridge and Culvert Data Exchange Standard

25 March 2009
This Standard is intended to define a common data exchange format for bridge and culvert data (xy locations and inventory information) collected in the State of Vermont. The hope is that this standard will enhance data compatibility and sharing between local municipalities, Regional Planning Commissions, and State Agencies.

Road Centerline Spatial Data Standard

25 January 2005
This Standard is intended to draw together all documentation and references related to the development and maintenance of Vermont's master road centerline spatial data layer. It outlines the structure of Vermont's road centerline data layer (TransRoad_RDS), herein referred to as RDS. This document will act as a road map to the future of this data layer. This standard will be phased in over a period of time. It will not be implemented all at once. Financial and organizational constraints will dictate the pace of implementation.

Surface Waters Standard

25 September 2008
The purpose of the surface waters standard is to adopt nationally accepted “framework” data models, their standards and associated programs as the foundation for developing and maintaining surface water and hydrologic unit boundary data in Vermont.

VT Geographic Area Codes Standard

14 October 2020
This standard defines codes for various incorporated and widely-used geographic areas in Vermont. Existing federal standards are leveraged by this standard to ensure maximum compatibility with state and federal data. A primary use of these standard codes is to store and link data related to these geographies. One capability of GIS is the creation of thematic maps (maps in which towns or other areas are shaded in based on the values for the different areas). An example would be a thematic map of population density for Vermont's towns. Thematic maps will be easier to produce from various data sources if users adhere to these standard geographic codes. The inclusion of these codes within state data at both the local and statewide level will also enable the linking of data from different sources and regions to perform analyses across municipalities, statewide, and at the national level.

VT GIS Metadata Standard

12 October 2016
This standard transitions Vermont’s from the FGDC Content Standard for Digital Geospatial Metadata (FGDC CSDGM) standard, which was adopted as the metadata standard for Vermont in 2006, to the North American Profile of ISO (International Standards Organization) 19115:20032 — Geographic Information — Metadata (NAP — Metadata) geographic metadata standard. This ISO Metadata has been adopted as the official standard for all VT GIS metadata in Vermont.

Land Use / Land Cover Codes

25 June 1995
Maps of land use and land cover are fundamental tools for natural resource management and planning. These land use/cover codes provide a standard system by which units of land can be categorized. Land use/cover maps serve to: assess the area and distribution of individual land use/cover categories (such as cropland and pasture, code 21), show the diversity of the landscape, contrast the land diversity of different regions, monitor changes in land use and/or cover over time. The VGIS Land Use/Land Cover Codes have been developed to provide compatibility with existing USGS codes, provide codes tailored to Vermont's landscape, permit land coding at a various resolutions (local, regional and state), avoid and clarify redundant classifications which depend on interpretation.

Map Coordinate System

25 March 1998
Standards for a map coordinate system are critical to retaining the integrity of Vermont Geographic Information System (VGIS) spatial data. Therefore geographic data stored in other coordinate systems require conversion for use in VGIS.

Digital Data Conversion

25 March 2019
The purpose of this document is to provide guidelines covering the digital conversion of existing manually drawn data into GIS format. The goal is to obtain the best possible digital map representing an original analog map. As such, it is assumed that a suitable source map exists. While the ultimate quality of the database is dependent on the quality of the source materials and the care used in automation, the procedures for original mapping are not discussed. It must be remembered that precise automation procedures will not improve an inferior base map.


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Vermont Center for Geographic Information
133 State Street
Montpelier, VT 05633-0210
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Tim Terway, Helpful GIS Professional
(802) 585-0820

John E. Adams, Director
(802) 522-0172

VCGI is your source for the State of Vermont's geospatial data, information, and activities.