managing georeferenced content with Plone and collective.geo

managing georeferenced content with Plonecollective.geo

Giorgio Borelli

What is collective.geo?

collective.geo is a package bundle for Plone that allows to georeference contents and to display them on a map

http://plone.org/products/collective.geo

what is collective.geo?

Existing solutions for Plone?

• Products.Maps

• Products.ATGoogleMaps

• raptus.article.maps

• they are specific for Archetypes

• they can only georeference points

• they can only use Google Maps

• it is developed for a specific project (Raptus Article)


I need a new product• that takes advantage of ZCA

• that is Plone3/4 specific

• that takes advantage of other projects that are developed by people that know GIS well

• that is modular, so that some of its parts could be used separately

• that gives the possibility to use maps that are not Google

• that can be easily extended in the future


2009 the first releasecollective.geo - step 1

• it provides a simple user interface to zgeo packages (from the gispython project)

1. zgeo.geographer (zgeo.plone.geographer)

2. zgeo.kml (zgeo.plone.kml)

• it uses openlayers (Google, Yahoo, Bing, Openstreetmap)


collective.geo step 2

• code refactoring

• project on coactivate

http://www.coactivate.org/projects/collectivegeo

• more contributors (rockdj, gweis)

• a nice logo

first stable release


collective.geo packages

Installation

• Shapely >= 1.0.14

• libgeos_c >= 3.1

• geopy

• BeautifulSoup

collective.geo.bundle

[buildout]...

extends= http://good-py.appspot.com/release/plone.app.z3cform/0.5.3?plone=4.0.5...

eggs= collective.geo.bundle BeautifulSoup...


c.geo.contentlocations

c.geo.openlayers c.geo.geographer

c.geo.settings

c.geo.mapwidget

c.geo.kml

Internal dependencies


collective.geo.openlayers

includes the javascript library Openlayers in Plone and some other javascripts that are useful for managing maps in collective.geo


collective.geo.geographer

• based on zgeo.geographer and zgeo.plone.geographer

• provides the basic mechanism to enter geographic data into georeferenceable contents.

• any object can be georeferenced if it implements IGeoreferenceable and IAttributeAnnotatable


collective.geo.geographer>>> class Placemark(object):... implements(IGeoreferenceable,... IAttributeAnnotatable)

>>> placemark = Placemark()

>>> from collective.geo.geographer.interfaces import IGeoreferenced>>> geo = IGeoreferenced(placemark)

Now set the location geometry to type "Point" and coordinates 105.08 degrees West, 40.59 degrees North

>>> geo.setGeoInterface('Point', ... (-105.08, 40.59))

A georeferenced object has "type" and "coordinates" attributes which should return the correct coordinates

>>> geo.type'Point'>>> geo.coordinates(-105.08, 40.59)

Example


collective.geo.settings• based on plone.app.registry

• store default settings for collective.geo

• map center

• zoom level

• which layers have to be shown on the map

• which contents can be georeferenced

• default styles for all features



collective.geo.settings

collective.geo.mapwidget

• manages the mechanism that handles Openlayers maps in Plone

• each map widget is a Zope component which contains a series of layers

• each map layer is an Openlayers layer and a series of page templates that take care of registering some Metal macro in order to include maps into pages.



map widget

map layers



>>> from collective.geo.mapwidget.maplayers import MapLayer

>>> class BingStreetMapLayer(MapLayer):... ... name = u"bing_map"... Title = _(u"Bing Streets")... type = 'bing'... ... jsfactory = """... function() { return new OpenLayers.Layer.VirtualEarth('%s',... { 'type': VEMapStyle.Shaded,... 'sphericalMercator': true });}""" % Title

Example

<metal:use use-macro="context/@@collectivegeo-macros/map-widget" />


collective.geo.contentlocations

• user interface for georeferencing Archetypes content types

• data is inserted in WKT format, then processed by the Shapely library and passed to collective.geo.geographer

• coordinates can also be specified through the Google geocoding service (geopy)

• for each georeferenced object it is possible to set customized styles that will make it different from others.


collective.geo.contentlocations

edit toolbar

geocoding

WKT data


collective.geo.contentlocationscustom styles


collective.geo.kml

registers a kml view on the georeferenced objects and on folderish contents such as Folders and Collections.


other possibilities

collective.geo.mapcontent - Makina Corpus

other possibilities

http://plone.org/products/collective.geo.mapcontent

collective.geo.flexitopic - Christian Ledermann

http://iwlearn.net/iw-projectsother possibilities

further development

further development

collective.z3cform.mapwidget

a specific widget for z3c.form that allows to manage thegeographic data in a easy way

from z3c.form import field, formfrom collective.z3cform.mapwidget ... import MapWidget

class MyForm(form.Form): fields = field.Fields(IMyInterface)

fields['geodata'].widgetFactory = MapWidget

http://svn.plone.org/svn/collective/collective.z3cform.mapwidget

further development

collective.geo.behaviour

a behaviour for Dexterity that allows to georeference contents and uses the annotations mechanism of collective.geo.geographer for registering data

http://svn.plone.org/svn/collective/collective.geo.behaviour

ContributorsSean Gillies

Silvio Tomatis - silviotGerhard Weis - gweis

David Breitkreutz - rockdjMakina corpus

Christian Ledermann - nanMaurizio Delmonte - miziodel

Alice NarduzzoEnrico Barra

managing georeferenced content with Plone and collective.geo

Technology

Transcript of managing georeferenced content with Plone and collective.geo