Calling all Surveyors, Aerial Photographist (sp?) and Assorted Basemappers….


For those of you in the greater New York City area, the NYC Department of Design and Construction has new requirements for you.  If you work frequently with them, i am not telling you anything new, but thought the community at large could benefit from this information.  Enough already, what’s the skinny?

As of January 2, 2007 (see, told you it wasn’t a newsflash), all new NYDOT, select NYDEP and any related CADD files need to be in a 3-D format. What the? 3-D? So, if i have those silly looking red & blue glasses, I can see the CAD file?  Nope, not this time anyway.  🙂

The deal is that all drawing features must contain 3-D intelligence so that a surface model can be created.  For Aerial firms, this really doesn’t change anything.  Let’s continue…  Apparently, the end game for the DDC is that the basemapping destination is Civil 3D! Additionally, any required alignments and profiles must be in a 3-D format useable in Civil 3D; either native objects or LandXML.

What does all this mean, other than the obvious submission requirement?  That at the core, they are moving from 2-D to 3-D designs.  This is awesome news!  For those firms struggling to carry both Microstation and Autodesk can now at least focus on one platform to support contracts with the DDC as well as supporting their own Engineering divisions more effectively!

Cheers to the NYC DDC for leading the way!


About Kevin
Hi… I am a husband, father, brother and neighbor. I am employed as a Civil Engineer and have enjoyed playing the drums for the last 30+ years.

2 Responses to Calling all Surveyors, Aerial Photographist (sp?) and Assorted Basemappers….

  1. James Maeding says:

    did they nail down the accuracy level? do people have to model every feature, or just centerline, curb/gutter, and grading?
    Modeling local depressions and cross gutters, as well as the precise grading around houses is a lot of work.


  2. Kevin says:

    James, from what i’ve been told, the technical quality aspect hasn’t changed, ie-level of accuracy, just the manner in which it is delivered, meaning a cad file with 3d intelligence. For most aerial firms, that is the norm for them anyway. But some of the old school basemappers prefer the contours be correct. Where they know the grade breaks and imply them with the contours. The idea is now to deliver the underlying “surface knowledge” instead of the pretty picture. So for those folks, the level of accuracy will be the challenge for them.


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