[Qgis-user] Converting Alberta Township System

[Brent Fraser]

Michael,

     The Alberta Township System can be a pain to relate to geographic 
coordinates. While it is a survey system (or land parcel definition 
system) defined by physical monuments placed on the ground, it is often 
just "estimated" using the original rules used in laying out the 
monuments back in the late 1800s.

     The official source of the data is 
http://www.altalis.com/products/property/ats.html.  While the polygon 
file is provided at a cost ($1000), a text file of survey corners is 
available for free.  But joining the corners into polygons is not for 
the faint of heart.

     If all you want to do is check general correctness of your data, 
and not the positional accuracy of your locations, you could use the 
federal government's approximation of the township system available at
http://geoscan.nrcan.gc.ca/starweb/geoscan/servlet.starweb?path=geoscan/downloade.web&search1=R=224039

     This is a 1gb download with several Canadian reference systems, 
including the township polygon shapes down to the section level 
(unfortunately not down to the quarter section level).  The files you 
would be interested in are named
\DATA\RFGRD\SHP\dls_w456_n83_polygon.* in the zip file.

Best Regards,
Brent Fraser

On 5/20/2014 4:34 AM, Michael Giebels wrote:
> Thanks Phil,
>
> but none of the sources listed there really help. The offered 
> ressources do not provide a layer as far as I skipped through it. A 
> layer would be just fine, but all I came up to was this converter and 
> a very poor Township Grid, available here:
>
> http://www.ags.gov.ab.ca/gis/map_converters/conversion_tools.html
>
> Still looking for a good solution that does not force me to do wild 
> guesses at sections when comparing wtih satellite imagery.
>
> Cheers
>
> Michael
> Michael Giebels
>
> Am 20.05.2014 12:10, schrieb Sir Phil Wyatt:
>> HI Michael,
>>
>> I don't suppose it's available as a layer already? There seems to be quite a
>> few resources here
>>
>> http://canadiangis.com/data.php
>>
>> Cheers - Phil
>> (at the other end of the planet - Tasmania, Australia!)
>>
>>
>
>
>
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