DC GIS

NLT is proud to have provided IT consulting and technical support services to the DC Office of the Chief Technology Officer for over 15 years! NLT has led and supported a wide range of critical projects and initiatives over this period including the development of the award winning DC Guide web portal, Master Address Repository (MAR), DC GIS data and enterprise GIS services, Citywide Planimetric Update, First Citywide 3D Multi-Patch Dataset, DC Office of Tax and Revenue and DC GIS, and much more.

Citywide Planimetric Update
In support of the DC GIS Strategic Plan, DC GIS undertook a citywide planimetric update in 2005. The original GIS planimetric data was produced from 1999 aerial photography. This effort was designed to update that pivotal dataset using new aerial photography obtained in 2005. NLT, in coordination with Fugro EarthData and DC GIS staff, worked to update and capture various planimetric layers to more accurately reflect the District’s ground conditions.

First Citywide 3D Multi-Patch Dataset
NLT, in partnership with CyberCity, supported the development of the first citywide 3D multi-patch dataset. In total, there are approximately 125,000 3D buildings, making it one of the world’s largest 3D models. NLT also developed three-dimensional spatially accurate photo-realistic models of Washington, DC, by merging the multipatches with oblique imagery. The goal was to aid DC GIS in developing an implementation plan for various 3D technologies and visualizations. NLT performed the initial pilot work leading to the development of this project and continues to support the District’s application and use of the data.

DC Office of Tax and Revenue and DC GIS
NLT is providing data editing, quality assurance, and quality control on Vector Property Map (VPM) layers at the DC Office of Tax and Revenue. The VPM is a comprehensive property database that provides detailed boundary information for lands throughout the District of Columbia. This effort includes researching and digitizing the city’s federal reservation property data. Until now, documents for those reservations had been missing and scattered. The location and dimensions of the reservations were contained in scanned paper documents from DC’s Office of the Surveyor, documents from the National Park Service, and digitized planimetric data gathered by DC GIS. NLT’s work involves converting the paper data sources into digital format using ArcGIS Desktop COGO, Editor, and Advanced Editing tools. NLT also fills special requests using property data and property source images to produce reports, maps, and supporting documentation.

DC Guide – Web GIS Design & Development
NLT led the design and deployment of the award-winning GIS portal for the DC Guide. In recognizing NLT’s work on this project, the National Association of State Chief Information Officers noted that the GIS technology in the DC Guide allows the application to seamlessly deliver a vast amount of information at a much faster rate than similar municipal websites.
Online mapping tools help website visitors find their way around the city, learn about DC history, research real estate property values, and more.

Geospatial Education
When DC GIS set out to improve the quality and lower the cost of geospatial education provided to DC Government personnel, it called on NLT. NLT’s trainer worked onsite with DC GIS and the Center for Workforce Development to compose training procedures; customize courses, documentation, and newsletters; enhance tools; and secure hands-on training facilities. Over the course of the project, NLT conducted GIS training for more than 700 DC Government employees. Our efforts met the goals of increasing awareness of the DC GIS program and educating DC employees about how to use GIS effectively.

NLT has also led a range of data development projects for the district including:

  • Routable multi-modal transportation network transportation model
  • Compressed high-resolution imagery for distribution to customers
  • Historical maps digitization and geo-referencing
  • Data model for DHS geospatial data exchange
  • FGDC (Federal Geographic Data Committee) standards compliance and exchange
  • Metadata creation
  • FCC and National Park Service datasets creation

Recently, NLT has been awarded an IDIQ contract to provide GIS services on a task order basis. Our first assignment under that contract involves Arc2Earth Google Data Services Enhancement.