Beginning to Explore and Use the...

transcript

21 October 2009 MN GISLIS Workshops 2009

Mashups, Web Services & KML

Beginning to Explore and Use the GeoWeb

AJ Wortley – UW State Cartographer’s Office David Hart – UW Sea Grant

Welcome – let’s get started• Laptop, wireless internet• Filezilla(?), Notepad or equiv., GE, if avail.• Open Workshop Home page ….{Type http://greatlakesmashups.net/MNworkshop/index.html

in your browser}

• Logistics – restrooms, break• Introduce instructors

• Give a sense of how Mashups fit into a Web 2.0 culture of technologies

• Give opportunity for hands-on experimentation

• Inspire ideas for uses in your work and give leading references to not only get started but continue exploring well beyond this workshop !

– Overview –

• Introduction to Web 2.0 and the GeoWeb– Introduction to Web 2.0, web services, KML– Introduction to Mashups Tutorial

• Planning a Lake Superior Boat Trip– Integrating KML & Web Services: 2 approaches– Integrated Mashup Tutorial

• Wrap-up, Questions & Evaluations

The Context

• Globalization• Shrinking resources• Information society• Moving from Maps as art and output …to geospatial as an organizing principle in

support of efficiency, economy, knowledge communication and measuring well-being

Author: Ludwig Gatke

URL: http://www.railsonwave.it/2007/1/2/web-2-0-map/

What is Web 2.0

Author: Tim O’Reilly

URL: http://www.oreillynet.com/oreilly/tim/news /2005/09/30/graphics/figure1.jpg

Author: Markus Angermeier

What is Web 2.0

Web 2.0According to Tim O'Reilly:

"Web 2.0 is the business revolution in the computer industry caused by the move to the Internet as platform, and an attempt to understand the rules for success on that new platform."

An IBM social-networking analyst, Dario de Judicibus, has proposed a different definition which focuses more on social interactions and on architectural implementation:"Web 2.0 is a knowledge-oriented environment where human interactions generate content that is published, managed and used through network applications in a service-oriented architecture."

Web 2.0 can be defined as "the philosophy of mutually maximizing collective intelligence and added value for each participant by formalized and dynamic information sharing and creation."

Wikipedia, the free encyclopedia

Web 2.0 – in other words

• Internet = platform –> connected devices• Government and corporate data combined

with user-created data (UCG,VGI, crowd- sourced)

• 2-way interaction encouraging interactive participation and collaboration

• Data push including authoring data as (re)usable web services

Web 2.0 Content Services

• Blog content• Web surveys, polls, feedback • Photo sharing, Video sharing• Searching, shopping• Social networking sites• Location, maps and mappable things… Enter Web services & Mashups

Web services

A Web service (also Web Service) is defined by the W3C as "a software system designed to support interoperable Machine to Machine interaction over a network." Web services are frequently just Web APIs that can be accessed over a network, such as the Internet, and executed on a remote system hosting the requested services.

{Note: API = Application Programming Interface }

“Open” Web services

• Differentiate … (all location examples)– Proprietary services (e.g. ArcWeb Services)– Commercial APIs (e.g. Yahoo/Google Maps)– Standards-based web services (OGC)

• Open Geospatial Consortium• + ISO, XML …• KML, WMS, WFS, WCS

– Defining Open … not always 100% clear

OGC Web service standardsOf primary interest…• Web Map Service (WMS) Image• Web Feature Service (WFS) Feature• RSS/GeoRSS Event• KML 3D View(not really a service, but we’ll come back.)

Of secondary interest …• Web Coverage Service (WCS) Grid• Catalog Service for Web (CSW) Catalog

On-line Mapping Applications and Open Geospatial Web ServicesInteractive ApplicationsWeb Browser Requirements for Interactive Maps:

Soil Landscapes of Canada

Version 3.0 Interactive Map

Version 2.2 Interactive Map

Soil Landscapes of Canada (SLCs) describe the major characteristics of soil and land for the whole country. SLCs were compiled at a scale of 1:1 million, and information is organized according to a uniform national set of soil and landscape criteria based on permanent natural attributes. More Info

Ecosystem FrameworkInteractive Map

Open Web Services: WMS GetCapabilities WFS GetCapabilities Ecozones Context Document

The National Ecological Framework provides a consistent, national spatial context within which ecosystems at various levels of generalization can be described, monitored, and reported on. The use of such a framework of standard ecological units provides for common communication and reporting between different jurisdictions and disciplines, and provides a common ground to report on the state of the environment and the sustainability of ecos

http://sis.agr.gc.ca/cansis/systems/online_maps.html

Map Web Service Authoring Tools

• MapServer• simpleWMS• GeoServer• Featureserver• …• Autodesk MapGuide & MapGuide Enterprise

• ArcGIS Server (ArcIMS, ArcObjects)

Web Service Clients• Web clients (Site, application, mashup)

– E.g. Targeted ads, RSS reader, weather site• Thin clients (software-lite, service-heavy)

– E.g. 2D: QGIS, gvSIG, UDig, Gaia– E.g. 3D: Worldwind, Google Earth,ArcGIS

Explorer • Thick clients (often traditional software)

– E.g. ArcGIS, AutoDesk Map, Intergraph

Map-based Web Services

• Map image• 3D image, photo image • Geocoding, reverse geo-coding• Gazetteer, place name search• Analytical processing services• Geo-tagged content services• Geosocial networks

Explore Our Planet ExploreOurPla.net has a OGC WMS database with +200 public servers and more than 30,000 layers. Most of them are viewable as base map and overlay with Google Maps as framework. You may combine them with transparency to visualize more information.An OGC Web Map Service (WMS) produces maps of spatially referenced data dynamically from geographic information. Combining different layers and extensions gives you a unique control and you will reach faster want you to achieve. In any case you can generate a handy geoLink or copy the URL as permalink to come back later or use the infomation about latitude, longitude, maps, overlays, etc in mails.

The picture above is only a preview of common used layers:

Mashup Concepts• Mashups – The merging of services and content

from multiple web sites in an integrated, coherent way is called a mashup.

• Most mashups do more than simply integrate services and content. Sites that do mashups typically add value. They benefit users in a way that's different and better than the individual services they leverage.

Source: http://java.sun.com/developer/technicalArticles/J2EE/mashup_1/

(Location) Map MashupsMashups are appearing on the web at an extremely fast rate. Three new mashups typically appear on the web each day. You can see some of the newest ones on the ProgrammableWeb site. The bulk of the mashups on the web involve the use of maps. Many of these sites use mapping services such as those provided by Yahoo Maps and Google Maps.

Source: http://java.sun.com/developer/technicalArticles/J2EE/mashup_1/

http://www.burbankca.org/planning/projectsmap.html

Mashups Utility in Planning & Management• Project communication

• Relevant regulations

• Participatory mapping

• Public outreach

• Combining multiple map services for visual interpretation

Enterprise Support

for Mashups

Exchange

(moving beyond shapefiles…)• First there was XML …

• Then there was GML …

• Now there is KML …

What is KML ?

• XML representation of a spatial perspective

• XML container format accomodating data, service and presentation elements

• Highly applicable in 3D visualization or 3D globe environments

KML Examples• WI Land Economic Inventory Maps Demo

~ Bordner Survey– http://sco.wisc.edu/maps/bordner_main.php

• Wisconsin Coastal Guide– http://www.wisconsincoastalguide.org/

• Great Lakes Information Network – http://gis.glin.net/

Wisconsin Coastal Guide – Map Features

• Land– Circle Tour route– Parks

• Shore– Beaches– Lighthouses

• Water– Shipwrecks

• Viewing– Panorama photos– Webcams

Use the map as a means to link to existing web content

KML Tools• Excel2KML, KML2SHP, SHP2KML…

Zonum Solutions’ KML Toolbox• ESRI export to KML• GeoServer, KaMeLwriter KML Editor• Google’s online KML Interactive Sampler• KML (V2.2) Validator beta by Galdos, Inc.• KML Clients (Google Earth, ArcGIS

Explorer, NASA Worldwind)

Good Sources of KML Files• Google Earth Gallery • “How Google Earth Ate Our Town” - Nanaimo, BC

– http://earth.nanaimo.ca/• Denver Regional Council of Governments Data

Catalog• Wisconsin Coastal Guide• Great Lakes Environmental Research Lab• Great Lakes Information Network GIS Catalog• NOAA (NWS, NOHRSC), NASA, USGS• Make your own !

To Make A Mashup

Process & NeedsDeconstructing a mashup

Constructing your own

Process re-cap

• Identify Problem/Question/Reporting need• Conceptualize Use Case Scenario• Identify data source and preparation• Identify map source, API, map function• Identify web page & server to host

Needs• A web server (host)• A web page on that host• An editor to edit web page• A code sample to get started• Possibly an API key to allow access• Possibly software tools, website tools or other

APIs for additional processing or webpage functions

• Motivation to revise, test & revise again

Deconstruction of a mashup

View Source is your friend

Sourcecode clues… google ‘em

Tag/ bookmark links for further research

Constructing a Starter Mashup

• Identify Problem/Question/Reporting need– Ex.: Great Lakes Recreational Boating

• Conceptualize Use Case Scenario– See map, click to see brief info., link to web

cam or further information• Identify data source and preparation• Identify map source, API, map function• Identify web page & server to host

Needs• A web server – http://69.59.176.25/• A web page on that host –

http://greatlakesmashups.net/MNworkshop/chicagoX/last name.html

• An editor to edit web page – Notepad, etc.• A code sample to get started –

www.mapbuilder.net• Possibly an API key to allow access –

GMaps API key• Motivation to revise, test & revise again

Mashup Tutorial

• Log-in to MapBuilder and Create Map• Save Map Center, zoom and overlay• Find addresses to geolocate or pick points• Add caption, description and marker• Export and save Source Code• Paste in GMAP KEY• Upload to webserver for testing.

Mashups Re-visited

• Walk Score – www.walkscore.com

• See, Click, Fix - www.seeclickfix.com

• City of Miami – www.miamigov.com

Integrated Mashup Tutorial

• Start with previous mashup code• Add KML to mashup• Add web map service (WMS) to mashup• Upload and preview/test

What’s Coming – Online Mapping/Mashup Frameworks

• Google MyMaps - http://maps.google.com/• GeoCommons – Maker!

http://maker.geocommons.com/• SpatialKey beta - http://spatialkey.com/• …

Beyond tools - considerations• Audience/ Use Case Scenario

• Interface usability and device independence

• Data access

• Information quality, privacy and security

• Resources and skills to get it done.

What it all means … mashing up

• Lower overall skills threshold and lower cost of ownership

• Faster development and rollout often soliciting iterative feedback

• Useful mid-project as well as for communication of results

• Extensible to other web services and api’s• May be the ‘right tool’ for some jobs

Learning more:

• Blogs, forums and listserves• Peers and social networking{Twitter, RSS feeds, conference news}

• On-line training and tutorials• Download, trial and error• Books

Thank You !Questions or Comments ?

AJ WortleyUniversity of Wisconsin

State Cartographer’s Officelwortley@wisc.edu

http://www.sco.wisc.edu/

David HartUW-Madison, Wisconsin Sea Grant

dahart@wisc.eduhttp://coastal.lic.wisc.edu/

http://www.seagrant.wisc.edu/gis/

Beginning to Explore and Use the...

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