Yep - I agree that it is a fruitless venture - quite frankly, even the
"license to use" methodology gives one no real peace of mind.
When this request popped into my mailbox, I figured it was worth a shot
putting it "out there", as I had not given this any thought for a number
of years now.
Interestingly, nothing has changed.
It is local authority information, and I have very strong views that it
should be "free to all", because public money was used to
gather/assemble the data set in the first place.
But, as I said, the request was not from a South African authority, so
maybe that (African) country still needs to go down that road.
Mankind is not known for learning from history :-)
Regards & thanks to all who gave some input.
Zoltan
On 2014/01/29 20:45, Alex Mandel wrote:
I think authorities have tried to do this in the past with poor quality
images and pdfs where all the layers are sandwiched together and not
meant to be disassembled. So that the only way to extract the data
beyond viewing is hand digitizing and recoding of the attributes.
I agree with Denis though that a more sensible approach is to just state
the time limits on the data. Or you can be nefarious like some road
atlas producers and seed small fictitious data that makes it easier to
catch people using the data improperly.
Enjoy,
Alex
On 01/29/2014 12:22 AM, Denis Rouzaud wrote:
The best way is to provide your data with a proper disclaimer of use.
Trying to add some lock is just useless. Anyone who will really wants to
fully get or edit the data will still be able to do it.
You will just make your bundle less usable, and loose some time/money at
trying to implement this.
How do you think that the survey services are publishing the land
registry? For sure not on DVDs with DRM. But their data has time frame
validity and is supposed to be read-only....
Cheers,
Denis
On 29. 01. 14 09:10, Zoltan Szecsei wrote:
On 2014/01/29 09:59, Alex Mandel wrote:
On 01/28/2014 10:53 PM, Zoltan Szecsei wrote:
Hi List,
I have a friend, not in South Africa, who has a need to bundle raster &
vector data with a map viewer, so that the entire package can be
deployed via a DVD.
The catch is that usage of the data bundled with this DVD, needs to
expire after 12 months.
So, does anyone know of a QGIS based solution - even if it comes with a
proprietary encryption module that allows for an expiry date?
I'd be curious if anyone has implemented such solution.
I also think that there may be a possibility of fee for someone to
develop such capability.
Regards and thanks,
Zoltan
That's a pretty messed up product I wouldn't go anywhere near. But short
answer is this isn't a QGIS specific thing it's DRM which the Video Game
industry has plenty of solutions for, most of which are completely
circumventable by smart computer users.
Enjoy,
Alex
Largely my thoughts too - but I didn't think of steering him towards
the gaming industry.....
Just to narrow down the prejudice a bit, what about a situation where
a local authority is giving out a specific dataset that needs to be
current, or at least non-editable?
I expect one could watermark the datasets with a routine that the
source-code is not available for. This watermark could have multiple
date-stamps that would "help" in not being able to turn the computer
clock back - and the data encryption could render it useless for
anything except the viewer it came with - in QGIS case, the inclusion
of a hook to the binary subroutine that encrypted (ok, messed up :-) )
the data.
Just a thought to stir up some discussion.
Z
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Zoltan Szecsei PrGISc [PGP0031]
Geograph (Pty) Ltd.
GIS and Photogrammetric Service
P.O. Box 7, Muizenberg 7950, South Africa.
65 Main Road, Muizenberg 7945
Western Cape, South Africa.
34° 6'16.35"S 18°28'5.62"E
Tel: +27-21-7884897 Mobile: +27-83-6004028
Fax: +27-86-6115323 www.geograph.co.za
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