Grab the geometry centroid - from each geometry; procude a delta x and a delta
y between the two centroids, and then calc he angle using the Math atan2
function
(http://download.oracle.com/javase/1.4.2/docs/api/java/lang/Math.html#atan2(double,%20double)).
This is the direction.
I think JTS may also have an angle utility class that may be easier. Here it is:
http://www.vividsolutions.com/jump/javadoc/com/vividsolutions/jump/geom/Angle.html#angle(com.vividsolutions.jts.geom.Coordinate,%20com.vividsolutions.jts.geom.Coordinate)
Jody
On 02/09/2010, at 8:00 PM, Feras Odeh wrote:
>
> I’m trying to solve this problem But I reach to a point where I can get the
> intersection features but how could I get the direction of each feature
> relative to the selected feature?
>
> Thanks
> Feras
> From: Jody Garnett [mailto:[email protected]]
> Sent: Sunday, August 29, 2010 5:38 PM
> To: Feras Odeh
> Cc: [email protected]
> Subject: Re: [Geotools-gt2-users] How to navigate through shapefile parcels
>
> Have you been through the docs on the website yet? The query tutorial will
> let you request features which touch the current one.
>
> Jody
>
> On 29/08/2010, at 5:28 PM, Feras Odeh wrote:
>
>
> Thanks Jody..
>
> Is there a tutorial to show me how to do that as I’m new to geo tools?
>
> Thanks
> Feras
>
> From: Jody Garnett [mailto:[email protected]]
> Sent: Friday, August 27, 2010 4:57 AM
> To: Feras Odeh
> Cc: [email protected]
> Subject: Re: [Geotools-gt2-users] How to navigate through shapefile parcels
>
> You can do a query to see which features "touch" the current one. Determining
> what direction each parcel is in may be a bit of fun (take the angle between
> the centroid of each feature? what about a parcel that surrounds another
> parcel (often seen with lakes surrounded by private land).
>
> You can also set up a graph based on the touch relationship; but I am not
> sure how useful that would be.
>
> Jody
>
>
> On 26/08/2010, at 4:37 PM, Feras Odeh wrote:
>
>
>
> Hello..
>
> I have a multi polygon shape file for a country every polygon represent a
> parcel. If I ‘m now on a selected parcel is there a way to navigate through
> parcels –i.e gets the south parcel , north one ……-?
>
> Thanks
> Feras
> ------------------------------------------------------------------------------
> Sell apps to millions through the Intel(R) Atom(Tm) Developer Program
> Be part of this innovative community and reach millions of netbook users
> worldwide. Take advantage of special opportunities to increase revenue and
> speed time-to-market. Join now, and jumpstart your future.
> http://p.sf.net/sfu/intel-atom-d2d_______________________________________________
> Geotools-gt2-users mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
>
>
------------------------------------------------------------------------------
This SF.net Dev2Dev email is sponsored by:
Show off your parallel programming skills.
Enter the Intel(R) Threading Challenge 2010.
http://p.sf.net/sfu/intel-thread-sfd
_______________________________________________
Geotools-gt2-users mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/geotools-gt2-users
