I may be missing something here, when we talked about polygon we mean
the borders on a map;
a map can be territory of a nation or a simple building with rooms or
a piece of land.
When we use google map, what we actually using is a map that was drawn
using polygon and in turn
each polygon is identifed by a zipcode and address.when you say for
example map(zipcode='20090')
we mean a polygon identified by zipode '20090',assuming the function
map is there that takes zipcode and return other attributes.
It is simple to port google map into web2py as far as territory of a
nation is concerned. But, this is only for a country
that already has the polygon drawn on the geo political map identified
by address and zipcode or by one of them. For countries with no
digital map in place, we should think having a tool that takes ploygon
as an attribute and
togther with other attributes, like address or zipcode etc.--- the
reason I am saying is,the polygon can be identified by GPS for a map
outside of a building, and by a tool that traces manually a map and
identify the x,y coordinate of lines (sides)of a ploygon where GPS
does not work.
Call it longitude and latitude in a computer it is always x,y with
distance scaling.
One can draw the polgon outside and port points of a ploygon to
web2py, e.g, points for polyon on a map are 2,3;4,5;6,7; and closed
ploygon. -- web2py will be able to draw the polygon on a console.
db.define_table('myCountryMapy',
db.field('polygon', 'points'),
db.field('zipCode'),
db.field('address'),
db.field('city'),
db.field('state'),
db.field('country'))
All fields are required.
for building :
db.define_table('myBuilding',
db.field('polygon', 'points'),
db.field('BuildingName'),
db.field('RoomName'),
db.field('Floor'))
All fields are required.
The former is for geo political map, and later is for building for
home automation and location identification of equipment with sensors
attached to them.
If possible web2py can incorporate reading of points from GPS, and
from tools used to identify points of a ploygon by tracing a map.
Regards:
dbb
On Apr 8, 3:26 pm, AchipA <attila.cs...@gmail.com> wrote:
> The big question is how web2py will evolve with regard to plugin/
> appliance architecture, because that would determine how to go about
> adding geo stuff in a systematic manner. I'm not sure I'd like
> it as a t2-style addon, but then again adding it to the core would
> mean way too many dependencies and try/catching.
>
> A quick glance how I could imagine geo func in web2py (this is just me
> thinking out loud, I'm aware of sahana and other projects and do not
> mean to impose these ideas on them):
>
> MODEL - the DAL would need to be extended with geometry types (I know
> Massimo is not too keen on this one :), which would allow for some
> operator magic web2py is known for. So you could do something like
>
> db(GEOM_POINT(5,5) in db.table.polygon_column).select()
> db(db.table.polygon.length > 100).select
> (orderby=~db.table.polygon.area)
>
> also, some geo-specific velidators could be useful (IS_CONTAINED,
> IS_IN_RANGE, etc).
>
> VIEW - It would be nice to have a generic helper which we could
> interface to popular web mapping tools. Think
> layer1=LAYER(backend='googlemaps', name.., params....)
> MAP([layer1, layer2], _width=320, _height=200)
>
>
>
> dbb wrote:
> > Tim:
>
> > The URL posted by individuals may have other functions which are not
> > related to mapping. What we need is to filter out
> > the Model,controller, and view of the mapping aspect and work on that.
> > Since this area by itself is big and has many usage in data
> > communication world- wired and wireless ( including sensors in the
> > home and outside of home (GPS)).
> > What I am requesting the people who had URL posted related to the
> > topics in question, to post a URL that related to mapping only.
> > As far as my request for mentor is concerned, it is related only to
> > launchpad.
>
> > Best Regards:
> > dbb
>
> > On Apr 8, 4:39 am, dbb <debe...@yahoo.com> wrote:
> > > Tim: I have applied for membership.
>
> > > On Apr 7, 11:52 am, Timmie <timmichel...@gmx-topmail.de> wrote:
>
> > > > Hello,
> > > > yesterday I created a web2py team at
> > > > launchpad.https://launchpad.net/~web2py
>
> > > > Please feel free to add yourself to the team.
> > > > It doesn't mean something special so far. But maybe this can
> > > > facilitate common development at later stage!
>
> > > > Also, I started a project for Geo stuff:
> > > > web2py Geo & GIS Extensions -https://launchpad.net/web2py-geo
>
> > > > My idea is to develop demo & example applications that are using
> > > > spatial information.
> > > > Maybe we could grant all team members commit rights to the repository.
>
> > > > I will try to develop some blueprints for the above mentioned example
> > > > applications.
>
> > > > I also asked the Launchpad administrators for a project
> > > > group:https://answers.launchpad.net/launchpad/+question/66678
>
> > > > This could provide a umbrella for us to link all individual projects
> > > > using web2py together.
>
> > > > I hope you appreciate these actions!
>
> > > > Regards,
> > > > Timmie- Hide quoted text -
>
> > > - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
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