[Gvsig_english] querying a shapefile

[Nik Go]

Thank you for your help Simon. I just wrote Nacho and will be waiting
for his response.

Regards and happy new year,
Nik

On 1/12/10, Simon Cropper (Botanicus Australia Pty Ltd)
<scropper at botanicusaustralia.com.au> wrote:
> Nik,
>
> My first choice would be approach Nacho (nachouve at gmail.com) about
> getting a precompiled version, along with instruction on how to set it
> up (relatively easy). I have all the pertinent details and files but I
> would need express permission to send you a copy as Nacho bypassed the
> list server when interacting with me (I took this to mean that compiled
> files were not necessarily public). He did post the source code onto the
> public server as noted on my previous post.
>
> Unfortunately I do not use Ubuntu and I have not yet found an easy way
> of compiling java source to a workable JAR file. By all accounts the
> best option is establishing Eclipse IDE (http://www.eclipse.org/) but I
> have not tried this myself.
>
> Cheers Simon
>
> Simon Cropper
> Botanicus Australia Pty Ltd
> PO Box 160, Sunshine, Victoria 3020.
> P: 9311 5822. M: 041 830 3437.
> mailto: scropper at botanicusaustralia.com.au
> <mailto:scropper at botanicusaustralia.com.au>
> web: www.botanicusaustralia.com.au <http://www.botanicusaustralia.com.au>
>
>
> On 12/01/2010 2:18 PM, Nik Go wrote:
>> My apologies for the oversight. I asked the same question from the
>> Quantum GIS mailing list, and I forgot to edit the question. My bad.
>>
>> Thank you, Simon for answering. I will look into the requirements of
>> the new version and see if I could compile Java without trashing my
>> system. Would you have any tips for a 64-bit Ubuntu user on getting
>> this done?
>>
>> On 1/12/10, Simon Cropper (Botanicus Australia Pty Ltd)
>> <scropper at botanicusaustralia.com.au>  wrote:
>>
>>> Nik,
>>>
>>> This is the mailserver for gvSIG not QGIS.
>>>
>>> That said, QGIS has the ability to establish distances between polygons.
>>> Look in the [Main Menu] [Vector] [Analysis Tools] [Distance matrix]...
>>>
>>> gvSIG + Sextante also has the ability to make a matrix -- city name
>>> along column and row with intersecting cell containing minimum distance.
>>>
>>> The latest version of Sextante (the one a lot of people are having
>>> trouble setting up at the moment) has a tool called "distance and angle"
>>> this may also help.
>>>
>>> Recently I had a need to establish the distance between polygons/points
>>> with the output being Unique ID1, Unique ID2, Distance, Bearing, etc...
>>> That is, one row per comparison.
>>>
>>> I received help from Nacho Uve who can be contacted on the Sextante
>>> Mailserver. He is developing a routine called CartTools. The Beta
>>> version of this program worked really well -- the only problem was that
>>> when comparing two polygons that were the same (zero distance) the
>>> bearing and angle output were returned as 90° and 0° respectively when
>>> it should actually return an error or warning (i.e. these values are not
>>> applicable and should not be returned).
>>>
>>> In this format it is simply a matter of applying the 'x' and 'y'
>>> attribute for each city and you have your answer.
>>>
>>> Nacho has submitted his routine to the Sextante source code repository
>>> http://forge.osor.eu/plugins/scmsvn/viewcvs.php/soft/sextante_lib/vectorTools/src/es/unex/sextante/vectorTools/distanceAndAngle/DistanceAndAngleAlgorithm.java?root=sextante&view=markup
>>> <http://forge.osor.eu/plugins/scmsvn/viewcvs.php/soft/sextante_lib/vectorTools/src/es/unex/sextante/vectorTools/distanceAndAngle/DistanceAndAngleAlgorithm.java?root=sextante&view=markup>.
>>> If you can compile java you will have no problem.
>>>
>>> Cheers Simon
>>>
>>> Simon Cropper
>>> Botanicus Australia Pty Ltd
>>> PO Box 160, Sunshine, Victoria 3020.
>>> P: 9311 5822. M: 041 830 3437.
>>> mailto: scropper at botanicusaustralia.com.au
>>> <mailto:scropper at botanicusaustralia.com.au>
>>> web: www.botanicusaustralia.com.au<http://www.botanicusaustralia.com.au>
>>>
>>>
>>> On 12/01/2010 5:11 AM, Nik Go wrote:
>>>
>>>> Hello. Happy new year to all.
>>>>
>>>> I have a shapefile of cities, is it possible to do the following in QGIS
>>>>
>>>>      * determine and visually display all cities with attribute "x" or
>>>> "y"
>>>>      * find out if the "x" cities share a border with other "x" cities
>>>>            o if they do, I want to add an attribute to the database
>>>>              indicating it as a neighbor of another "x" city
>>>>      * find out if the "y" cities share a border with other "y" cities
>>>>            o if they do, I want to add an attribute to the database
>>>>              indicating it as a neighbor of another "y" city
>>>>
>>>> Thank you and regards.
>>>>
>>>> Nik
>>>>
>>>>
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