[Talk-ca] [Imports] [Import] Ottawa Buildings & Addresses [Statistics Canada project]

[Stewart C. Russell]

On 2016-10-21 11:41 PM, James wrote:
> Sounds like it, but the data handed to us didnt have sidewalks and
> roads, driveways etc. Ottawa may have exported data from this file

Yes, for sure.

I've now had more of a chance to look at the data (thanks, Ottawa, for
providing no docs at all ...). I'm pretty sure that the data at
http://data.ottawa.ca/dataset/cad-topographic-data is the source of what
the Ottawa group were given.

In the 31 gigabytes of converted files, about 8-10 of the 177 total
layers might be of interest. But:

* The files are in some kind of MTM projection, but I don't know the
datum. Some munis still love their NAD27, so getting this right is crucial.

* These were digitized 2010-2011 at the latest. Since municipalities
share data with NRCan, aren't these outlines already available in a
recent iteration of CanVec in a much more useful (i.e., anything but
DWG) format?

My notes on the files, so far:
https://gist.github.com/scruss/e7f85da2e7943cb1a1d13772fbe144d3#file-ottawabfomapdata-md

(feel free to use/modify/etc)

If anyone wants 31 GB of converted DXFs, let me know. It took Teigha
several hours on a quad core with SSDs to convert this, so I'm not going
to delete it lightly.

cheers,
 Stewart