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Representative Projects

Nassau County Traffic Scanning

Mineola, NY

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Key Project Elements

  • Scanning Record Drawings

  • GIS System Design
  • GIS Data Creation
  • DBMS Programming
  • VB/MapObjects Programming
Project Description

Before we came onboard, the Traffic Division had a completely manual system for maintaining as-built records of their pavement markings throughout the County.  Of the more than 2000 C-size drawings in the system, at least 1700 were hand drawn on paper or mylar.  The other 350 were in various stages of Autocad - some in paper space, some in local model space, and others registered to the State Plane Coordinate System via the County’s GIS.  There was no discernable system for determining which documents were as-built and which were proposed.  We found as many as four copies of each drawing in various directories on the network but no one knew which ones were current.

We began the system upgrade by digitizing the drawing locations from their cloth index book into an ArcView shape file.  We wrote a small MapObjects program to display the shape file on top of the County road system and deployed the application to users’ desktops.  At this point, users no longer had to go to the files to locate the name of a particular document.

Next, we scanned the 1700 paper documents, filing them in the digital index system we had just created.  Now the users could retrieve and view the paper documents at their desktops.

Quality control was an important next step - sorting out the drawings that existed with no corresponding entry in the index, and the index entries that had no paper drawing to match them.

We also purchased several copies of AutoCad Map 2002 and CAD Overlay for delivery to the Traffic Division.  We trained them in the use of this software so that they could make simple updates to the raster images rather than working on paper or completely re-drawing the documents in Autocad.

We have met with the Division a number of times now to document the life cycle of the pavement marking drawings and have used that documentation to expand the Visual Basic/MapObjects application to completely manage the creation and archiving of Autocad drawing files via an Engineering Change Order system.  All edits to the drawings are automatically recorded in an Access database to maintain a history of changes to the County road system.
 

 Copyright 2010, DeBruin Geomatics, LS, PE, PC