Section 1. Purpose
In order to integrate geo-spatial technology into the work flow of multiple divisions under the West Virginia Department of Transportation (WVDOT) the collection of accurate and consistent geo-spatial data is critical. Therefore, to ensure and improve compatibility between the divisions, geo-spatial data standards need to be implemented throughout the Department. This is needed to provide accurate and integrated analytical quality data to assist the WVDOT with its mission to provide a safe, effective, and efficient movement of resources for the people of West Virginia.
Section 2. Policy
This policy establishes minimum standards for the collection and documentation of coordinates for all geo-spatial information regulated under or within the jurisdiction of the West Virginia Department of Transportation (WVDOT).
The goal of this policy is to increase geospatial accuracy, promote integration, and improve precision within the WVDOT and meet standards for all Divisions. It is also intended to facilitate the integration of high-accuracy data into the WVDOT's Geographic Information Systems (GIS), thereby promoting the enhanced use of geo-spatial analyses to improve informed decision making throughout the WVDOT.
This policy applies to all WVDOT personnel and programs including contractors and grantees that collect geospatial data. Requirements of this policy apply to all spatial data collected including, but not limited to, survey data, global positioning systems data, computer aided design (CAD) data, and aerial photography.
Henceforth, geospatial coordinates are to be collected utilizing technology capable of a 1-meter level of accuracy. Techniques such as GPS or conventional surveying should be used to obtain positions at accuracies greater than 1 meter. GPS should be used to obtain positions at the highest possible accuracy.
The recommended standard for representing and reporting geospatial data is as follows.
Universal Transverse Mercator (UTM)
height above mean sea level (MSL) meters
Alternate format that will be accepted:
US State Plain 1983
WV North 4701 or South 4702
height above mean sea level feet
Any deviation from above formats must be approved by the WVDOT GTI Section.
Legacy geo-spatial data
There will be a systematic process of improving legacy geospatial data to
the new higher accuracy standard.
In cooperation with the WVDOT GTI Section, each division will develop a plan within 6 months of signing this policy to move legacy data to the new standard.
Future geospatial data
All positions obtained utilizing GPS will be differentially corrected and will adhere to policy standards.
All computer aided design (CAD) work will be in either the recommended coordinate standard or one of the alternate formats.
All remotely sensed information being purchased and/or services requested will be coordinated with WVDOT GIS Section.
It is important that the WVDOT develops a national reputation of providing high quality geospatial data in compliance with the Federal Geographic Data Committee (FGDC) standards.
Therefore, if geospatial data is to be used for the purpose of populating a GIS external of WVDOT then the distribution of that data is to be completed by WVDOT GTI Section.
Purchase of software, hardware and contractual services related to GIS and GPS are to be coordinated with and approved by WVDOT GTI Section.
All geo-spatial data collected by any and all WVDOT Agencies will be provided to WVDOT GTI Section digitally in one of the above designated projection systems in a timely manner.
This policy does not preclude or rescind more stringent regional or program-specific policy requirements