Usability in the GeoWeb

Why Web Design Firms can Eat Your Lunch Dave Bouwman / Data Transfer Solutions / http://blog.davebouwman.net

are geo-geeks

we know spatial data

analyze data

create impressive maps

and all was good… until…

your manager sent a memo…

Era of “WebGIS”

stuff “GIS” in a browser

Cram desktop into A browser

a lot tolearn

new Web Manager applications

customization meant…

WebGIS Lesson Plan Same tools Programming 1. Object Oriented 2. VB.NET / C# / Java Same workflows 3. Intro to HTML and CSS 4. ESRI WebADF Same terminology 5. Webservices 101 Worse performance

before long…

.NET XHTML CSS Javascript Visual Studio

Screen shot of CDOT

about your lunch…

what if we were web developers

how would we see “WebGIS”?

most “WebGIS” sites are…

“Data”

“Tools”

interface

“Tasks”

“Analysis”

market analysis

Complex Cost Usability Value

budgets: high expectations: low

Complexity Cost Usability Value

“WebGIS” means opportunity

and right about this time…

your manager sends another memo…

GeoWeb

GIS meets… two dot oh

address spatial business problems in a browser

publish &consume services

more to learn

Todays Lesson Plan Same tools Javascript 1. Object Oriented 2. Ajax: GETting and POSTing Same workflows 3. Intro to JQuery and Dojo 4. Designing RESTful services Same terminology 5. JSON and JSONP 6. CSS and browser tweaks Worse performanceweb 7. Designing for social the social

more tools

FireBug & Aptana

how do we tackle this?

protect your lunch?

we must accept…

we must understand…

usability trumps features

we must master…

Atom WFS .NETXHTML CSS TDD Ajax Javascript RSS JSON REST XML GeoRSS WMS

users love…

users want…

Project Overview Same Bird Flu Database •Global tools Same ModuleModel •Spatial workflows •Complex Data in a CMS Same terminology • 2000 Tables • >10,000 Stored Procedures WorseEarth + Dojo Toolkit UI •Virtual performance

Example 2

Project Overview Same tools Management •Roadway Project •Workflow Application SameBack-end workflows •SAP SameToolkit+UI •Dojo terminology •OpenLayers WMS Worse performance

real performance

Get Extent Get Points Cluster Return to Browser

>50,000 As Points As X,Y’s in a Table ArcSDE + AGS: > 5 seconds Tabular Query: 0.3 seconds SQL2008: ~ 2 seconds *Supports complex queries

JSON: = fast custom { quot;ClusteredPointLocationIdsquot;:[34480,34355,34354], quot;PointLocationIdquot;:34480, quot;IsClusteredquot;:true, Locationquot;:{quot;Latquot;:-2.15,quot;Lonquot;:-80.53} }

geo-geeks

push pins?

perceived performance

activity indicators

SAP Get Project List

what’s should I do?

handle the “null-case”

Focused Tools

I only want to see the data for Calidris alpina, in Turkey, between 1998 and 2008

generic tool could work…

automatic validation

pre-validate whenever possible

validate as soon as possible

SAP Ref Selection

map the workflow

debug on paper

stop scope-creep

release early

release often

iterative development Iteration 2 Weeks Project Iteration Product Backlog Backlog

receive feedback

Zen of Usability Same tools •Faster = Better Sameon the wire •Lean workflows •Use what works Samesmall bites •Take terminology •Provide Feedback WorseSuccess •Pit of performance •Design & Validate Usability

Summary:

kung-fu: needed

performance is critical

focus on usability

nobody can touch your lunch

Questions? Dave Bouwman Data Transfer Solutions dbouwman@edats.com http://blog.davebouwman.net

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Usability in the GeoWeb

by Dave Bouwman on Oct 29, 2008

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Usability in the GeoWeb — Presentation Transcript