Stormwater GIS Build-Out

Geoindexed GIS with 648 As-Builts & Mobile Field Data

The City of Bowie, Maryland contracted Weston & Sampson to build out their stormwater utility GIS system.

Our team received a sample of GIS data, approximately 700 digital as-built PDFs, and raster data stored in an Esri file geodatabase. Plans were categorized into public and private developments, and relevant pages were converted to TIF format for georeferencing. Using 1,403 georeferenced images, we established a geographic index (geoindex) of the as-built plans, which enabled in-GIS retrieval of the original PDFs. Stormwater assets—including gravity mains, force mains, catch basins, manholes, outfalls, fittings, and detention basins—were digitized with full attribute data. We also captured elevations of structure rims (manholes and catch basins), as well as inverts and slopes for gravity mains, to support hydraulic modeling and 3D representation. A pilot area guided the approach, and the project was completed on time and on budget.

Location
Bowie, MD
Year
2020
Industry
Municipal
Services
Stormwater, GIS & GPS
Categories
Permitting & Compliance
Contact Us
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Project Highlights

  • 648 Individual As-Built Sets Geoindexed
  • 1,403 Individually Referenced Images
  • 160 Miles of Stormwater Gravity Main Digitized
  • 2,000 Stormwater Manholes Digitized
  • 4,800 Catch Basins Digitized
project testimonial “Thank you very much for helping us with this important project! You and your team provided excellent and timely deliverables which greatly helped us to meet our stormwater permit requirement. The whole project implementation and delivery process is smooth, well planned and pleasant. Your communication is very efficient and your team’s product quality is fantastic. I do highly appreciate you and your team’s effort!” – Hong Yin, Assistant Director of Public Works

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