Path: csiph.com!usenet.pasdenom.info!dedibox.gegeweb.org!gegeweb.eu!nntpfeed.proxad.net!proxad.net!feeder1-2.proxad.net!nerim.net!novso.com!news2.euro.net!newsgate.cistron.nl!newsgate.news.xs4all.nl!post.news.xs4all.nl!not-for-mail
From: tkhan10 <tkhan10@masonlive.gmu.edu>
To: python <python-list@python.org>
Subject: RE: Help about finding a python script on geographic masking
Thread-Topic: Help about finding a python script on geographic masking
Thread-Index: Ac4EhxdBH9odK6p3QbOFddUpPZokewACE0OAAAAgjOoADTgkAAAfAHEl
Date: Thu, 7 Feb 2013 14:56:34 +0000
References: <B42277EDBA29364895CF4E9878D3700720A771E5@SN2PRD0102MB103.prod.exchangelabs.com> <511292C3.30600@gmail.com> <B42277EDBA29364895CF4E9878D3700720A7722F@SN2PRD0102MB103.prod.exchangelabs.com>, <5112EC54.4030902@gmail.com>
In-Reply-To: <5112EC54.4030902@gmail.com>
Accept-Language: en-US
Content-Language: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
Precedence: list
Newsgroups: comp.lang.python
Message-ID: <mailman.1450.1360249009.2939.python-list@python.org>
Lines: 82
NNTP-Posting-Host: 2001:888:2000:d::a6
Xref: csiph.com comp.lang.python:38351

Thank you for your reply.=0A=
=0A=
Actually I wanted to post it on the list but didn't notice that it went onl=
y to your email. =0A=
=0A=
For the shape file part: yes I have a sample patients' data in a shape file=
 with the patients' address locations (where the lat/long for the addresses=
 are available) and these actual locations need to be masked. Some arbitrar=
y points have to be made to represent these locations so that actual addres=
ses (privacy of the patients) can be protected.=0A=
 =0A=
I am very much interested in creating my own script but the fact is that my=
 adviser wants me to find if there any script available from the people who=
 did work with these methods. Actually for making my script I just need to =
understand detail of these methods so that I will have ideas how I should p=
roceed. But I am trying to make my own script and I hope to get help from y=
ou and others on that.=0A=
=0A=
Thank you so much=0A=
 =0A=
________________________________________=0A=
From: Python-list [python-list-bounces+tkhan10=3Dgmu.edu@python.org] on beh=
alf of Michael Torrie [torriem@gmail.com]=0A=
Sent: Wednesday, February 06, 2013 6:50 PM=0A=
To: python=0A=
Subject: Re: Help about finding a python script on geographic masking=0A=
=0A=
Let's keep this on the mailing list.  Replying to back to the list.=0A=
=0A=
On 02/06/2013 10:47 AM, tkhan10 wrote:=0A=
> Yes I have some shapefiles where some locations are geocoded. You can=0A=
> think it as a layer containing some points. I need to hide the actual=0A=
> point locations and create a new locations in a way that further=0A=
> analysis on that point layer would not affect the result but i can=0A=
> hide the actual point locations.=0A=
=0A=
It definitely helps when asking questions on the list to include all=0A=
these important, relevant details, such as the fact you are trying to=0A=
process shapefile data.=0A=
=0A=
But more questions remain.  What are you trying to do with the=0A=
shapefile?  Are you trying to parse a shapefile, remove certain things,=0A=
add other things, and generate a new shapefile?  Who or what are you=0A=
trying to hid things from?  From your comment below I gather you want to=0A=
do some sort of transform to the shapefile?  And the output is a=0A=
shapefile?=0A=
=0A=
Do have any python code you've been working on?  Check out:=0A=
=0A=
https://github.com/sgillies/shapely=0A=
=0A=
It appears to be an actively developed GIS library for python.  I think=0A=
you could use it to read the shape file and then you could program any=0A=
transformation you want using math libraries like numpy.  There are=0A=
other GIS libraries for python; you only have to google to find them.=0A=
Though I know nothing of their state or communities.=0A=
=0A=
> There are some methods available on masking including:: aggregation=0A=
> of area or point  / affine transportation/ random sample perturbation=0A=
> [random points are created within a buffer and then actual locations=0A=
> are assigned to random points]  /  attribute perturbation/ location=0A=
> swapping  /   transformation [[ translation (shift locations at a=0A=
> fixed distance and direction); scale (expand or contract points by a=0A=
> scaling factor), rotation (rotate points by a fixed angle about a=0A=
> pivot point) ]]=0A=
=0A=
Not being a GIS person or a linear algebra person, I'll take your word=0A=
for it.=0A=
=0A=
Your question seems more to be about finding and using a ready-made=0A=
tool, more than about python programming.=0A=
=0A=
> there are many articles are out there where these methods have been=0A=
> utilized and I think for some of these the authors made their own=0A=
> script. I am trying to search for any of these types of script. if I=0A=
> can find one, I will have idea how to do these maskings.=0A=
=0A=
You might contact these authors.=0A=
--=0A=
http://mail.python.org/mailman/listinfo/python-list=0A=
=0A=