On Sat, Jul 25, 2015 at 4:31 AM, Sven Van Caekenberghe <sven@stfx.eu> wrote:

Arturo,

In Pharo itself, you could just do it yourself, like this:

T3GeoTools class>>#is: position inside: polygon
�� "T3GeoTools is: 5.33732@50.92601 inside: { 5.48230@50.82249. 5.49523@50.81288. 5.50138@50.82008. 5.50228@50.82595. 5.49265@50.82560. 5.48230@50.82249 }"

�� "T3GeoTools is: 5.49007@50.82205 inside: { 5.48230@50.82249. 5.49523@50.81288. 5.50138@50.82008. 5.50228@50.82595. 5.49265@50.82560. 5.48230@50.82249 }"

�� "Point in polygon - ray casting algorithm - http://www.ecse.rpi.edu/Homepages/wrf/Research/Short_Notes/pnpoly.html"

�� | inside otherIndex |
�� inside := false.
�� otherIndex := polygon size.
�� polygon doWithIndex: [ :each :index | | other |
�� other := polygon at: otherIndex.
�� (((each y > position y) ~= (other y > position y))
�� and: [ position x < (((other x - each x) * (position y - each y) / (other y - each y)) + each x) ])
�� ifTrue: [ inside := inside not ].
�� otherIndex := index ].
�� ^ inside

Inside circle, rectangle etc are trivial.

Sven

> On 25 Jul 2015, at 01:19, Arturo Zambrano <arturo.zambrano@gmail.com> wrote:
>
> Hi All,
>�� I would like to get some advice regarding which path I should take.
>
> Problem:
>�� Given a coordinate I want to know to which geographical object it belongs to.
>
> Path 1
>�� Using Glorp to make a query to a Postgis instance containing the boundaries of the geobjects
>
>
>
> Path 2
>�� Use the data form GADM data (according to this thread).

>
>
> I would avoid path 1 in order to avoid installation of postgi. From the
> thread mentioned above, I thing that it requires some development.
>
>
> Regarding Path 2, I don't see which framework or library should I use to
> import and query the data contained in the KMZ from GADM.
>
>
> Any advice is welcome.
>
> Best regards.
> Art
>
>