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[Fwd: RE: Developer's Guide for MIT/GIS Web Services]


ben et al. --

can you demonstrate an instance in which the interface
linked below produces correct outlines, but the
corresponding raw DXF has an error?  greg knight of
MIT says that this can't/shouldn't happen, since the
GIS interface is exporting data derived from the DXFs.
so i'm curious to see if there really is any discrepancy.

seth

-------- Original Message --------
Subject: RE: Developer's Guide for MIT/GIS Web Services
Date: Tue, 5 Oct 2004 10:39:53 -0400
From: Greg Knight <GKnight@PLANT.MIT.EDU>
To: 'Seth Teller' <teller@csail.mit.edu>


When I said 'corrected' I was using your terminology.  A more accurate term
would be 'rectified' - which would include rotating, scaling, and
translating to real world coordinates.

Greg

-----Original Message-----
From: Seth Teller [mailto:teller@csail.mit.edu]
Sent: Tuesday, October 05, 2004 10:30 AM
To: Greg Knight
Subject: Re: Developer's Guide for MIT/GIS Web Services



greg, thanks for this. a question:

 > The floorplans are
 > 'corrected' with map queries.

what does this mean?  if there's an error in the DXF
source, by what means is it corrected?  and how does
the correction "stick" for future queries?

thanks,

seth

Greg Knight wrote:

Seth,

This interface serves up the content for our internal space management system (sms) as well as the content for whereis.mit.edu.

The source of the spatial data is our campus map and floorplans -- the same data sources for the dxf data we provide you. The floorplans are 'corrected' with map queries. The interface doesn't serve up a complete floorplan data set however - just the space polylines - and not architectural elements.

Greg



-----Original Message-----
From: Seth Teller [mailto:teller@csail.mit.edu]
Sent: Sunday, October 03, 2004 7:03 PM
To: Greg Knight
Subject: Developer's Guide for MIT/GIS Web Services



greg,

my students and i came across

<http://ims.mit.edu/help/index.htm>

and we're confused -- what is the relationship between
this interface and the DXF source data?

it appears that this interface exports corrected
floorplan data -- is that right?  if so, where do
the corrections come from?

thanks,

seth