GeoWeb2009 presentation: Long Island Index & OASIS

Leveraging Interactive AJAX Web Tools for Online Maps Presentation at GeoWeb 2009 – Academic Track Steven Romalewski CUNY Mapping Service The Graduate Center / City University of New York July 2009

The Challenge GeoWeb 2009 – CUNY Mapping Service
Transit connections between where people live and where they work across Nassau and Suffolk counties;
Long Island’s downtowns in relation to multi-family housing density plus access to parks and open space;
The communities with the highest proportion of multi-family units compare with regional views of age of housing stock ;
Income attributes of any given community plus its concentration of rental units ;
Brownfield locations compared with population patterns by race/ethnicity;
All of this and more with aerial photography …
… on a map, all at once, interactively, online. The Long Island Index wants to show (among other things):

Mapping Multivariate Data GeoWeb 2009 – CUNY Mapping Service
Multiple symbol types
Some traditional cartographic techniques …
Small multiples
Multivariate dot density maps
Different textures
Transparency (eg., color coded DEM “draped” over hillshade)
http://junkcharts.typepad.com/junk_charts/2009/06/reading-comprehension.html http://makingmaps.net/ http://mappingcenter.esri.com/index.cfm?fa=maps.craterLake&effect=View%20PDF

Map display on the desktop GeoWeb 2009 – CUNY Mapping Service Integrates many of the multivariate approaches

Map display on the desktop GeoWeb 2009 – CUNY Mapping Service Also can leverage emerging geostatistical software packages with multi-framed display of integrated data http://www.geovistastudio.psu.edu/tutorials/ Data_Mining_in_GeoVISTA_Studio.pdf

Map display on the desktop GeoWeb 2009 – CUNY Mapping Service But… How does this translate online? http://stats.oecd.org/OECDregionalstatistics/

Online map display GeoWeb 2009 – CUNY Mapping Service
PROs
Interactive
Zoom in very close or out very far with ease
Add or remove “layers” of data from the map
“ Slippy” maps easy to navigate
CONs
Single frame generally rules out small multiples
Multiple symbol types (including dot density and texture) generally don’t translate well for thematic/analytical maps
but they can work well overlaying roads with choropleths, for example
Transparencies would work, but until recently the cumbersome nature of webpage redraws makes this clunky
Also, challenge of keeping it simple while making GIS analytic tools accessible

Enter AJAX, applied to online maps
Open Source movement rapidly making new tools more accessible, encouraging experimentation and early deployment
Geoserver & Mapserver, OpenLayers, etc
ESRI also enhancing their toolkit
New ArcGIS Server tools – caching, etc
Some early adopters of innovative approaches:
www.DataPlace.org www.PolicyMap.org www.MapTube.com
GeoWeb 2009 – CUNY Mapping Service
Online mapping in a post-Google Maps world
Ease of use and intuitive display
Relatively easy integration of multiple data sets from disparate sources (ie, mashups)
No need to click on a “ i ” tool to access attributes, or click a “hand” tool to pan the map, for example
http://sanbernardino.ca.crimeviewcommunity.com/

New York-area examples GeoWeb 2009 – CUNY Mapping Service
Early 2006, CUNY Mapping Service established with broad mandate – help CUNY researchers and others leverage the power of GIS in their work, and continue developing cutting-edge interactive online mapping systems
Long Island Index project asked us to develop interactive mapping feature for www.longislandindex.org
Index background – needed to make complex issues more understandable to public (esp. to visualize inter-relationships and multi-level spatial patterns) and to engage people via the Web
A second project is a complete overhaul of the Open Accessible Space Information System (OASIS) website ( www.oasisnyc.net ), first created in early 2000 using ArcIMS in collaboration with ESRI, USDA Forest Service, and more than 40 local NGOs, public agencies, businesses, and individuals.

A hybrid “geo stack” GeoWeb 2009 – CUNY Mapping Service
Technology choice: combination of ESRI/Microsoft with open source JavaScript frameworks
ArcGIS Desktop and ArcSDE/SQL Server to manage the data sources.
ArcGIS Server to generate web map services from MXDs and generate cached tiles for selected map layers.
OpenLayers consumes WMS resources, manages and displays the map layers, and provides map navigation tools.
Dynamic data feeds are also provided via REST web services.
Ext JS provides the overall web framework and enables us to relatively easily integrate AJAX-style tools such as dynamic transparencies.
With the exception of the satellite/aerial photos, we host all map layers
Simply too much data to simply mash it up with a basemap from Google Maps or Microsoft and we wanted cartographic control.

When you select a village:
It’s highlighted in orange ;
Local statistics and charts are displayed; and
The overview map shows where on LI you’ve zoomed to.
The Long Island Index interactive map – visualize your community in new and powerful ways 1 2 3 Map your village

See population or housing patterns in and around your community

Map education statistics district-by-district – NEW for 2009!

Add transportation routes, schools, environmental sites, special districts, and more

The transparency slider 0% transparent 50% transparent 100% transparent reveals what’s underneath

Compare aerial photos with Census and land use patterns 0% transparent 70% transparent 100% transparent Click on the red marker for a bird’s eye view

Explore regional views of key demographic indicators You can zoom out to see the entire island, and then double-click on the list to zoom back in and see community-level detail.

For more info, contact: GeoWeb 2009 – CUNY Mapping Service Steven Romalewski, Director Phone: 212-817-2033 [email_address] CUNY Mapping Service at the Center for Urban Research The Graduate Center / CUNY 365 Fifth Ave., Room 6202 New York, NY 10016 www.urbanresearch.org David Burgoon, Application Architect Phone: 212-817-2038 [email_address]

GeoWeb2009 presentation: Long Island Index & OASIS

by sromalewski on Jul 31, 2009

Accessibility

Upload Details

Usage Rights

1 Embed 1

Statistics