Bringing Internet Data Content

into GIS Applications

Rod Low

Hawaii Pacific GIS Conference Honolulu, March 5-7, 2012

Application Platforms

• Desktop

• Web Browser

• Mobile Device

Application Platforms

• Desktop

• Web Browser

• Mobile Device

Need Server for GIS

Data & Functionality

Application Platforms

• Desktop

• Web Browser

• Mobile Device

Can Survive Interruptions

of Service

•Emergency Management Situational Viewer •Accessible from

Honolulu EOC (Emergency Operation Center) & Remotely •Runs in Web Browser (IE specified)

•Client uses Adobe Flex with ArcGIS Flex API 2.3

•Server uses ArcGIS 10 Server with Enterprise SDE

HONUA

•Situational Viewer

•Mashup

Approaches

• Hyperlinks

• Feeds

• Services

Approaches

• Hyperlinks

- Open a browser pointing to the specified URL

- Does not digest the information

• Feeds

• Services

Approaches

• Hyperlinks

• Feeds

- GeoRSS Standard - Other (often legacy)

• Services

GeoRSS feeds

• RSS is an XML Standard

- GeoRSS Standard adds Spatial Tags

Real world seldom completely correct:

Other Feeds

• Any regularly updated web site, any format

• Example NOAA weather feeds

• Tools available for Web Scraping

- Generic (e.g. XML to CSV)

- Vendor-Specific (e.g. import to SDE)

Approaches

• Hyperlinks

• Feeds

• Services

Services

Map & Image Services

Geometry

Feature Service

Special (examples)

Geocoding

Network Service

3 D Service

Geoprocessing Service

Services

Map & Image Services

• Basemap

- Cached Tiles for improved performance

- Fixed Scales

• Dynamic Service

- User control over Visibility, Scale & Symbology

Accessing Services

• SOAP (older approach)

• REST “endpoint”

DEMO:

http://geodata.sdal.hilo.hawaii.edu/ArcGIS/rest/services

/Statewide/Hazards/MapServer

Geometry Service

• GIS Functionality

– e.g. re-project data

Feature Services

• Added at ArcGIS 10

• Allows Web Editing

Specialized Services

• Geocoding

• Network Service

• 3 D Service

Geoprocessing Services

• You have more control

• If a specialized service is available, it will be much more efficient

Putting it all together

• ERG (Chemical Spill)

• Need to know wind direction

- Web Scrape the NOAA current weather

- Geoprocessing to find nearest weather gage

Conclusions

• GeoRSS standard needs to be better followed

Until then: - Customized code needed for reading most XML - Web Scraping useful

• Even desktop benefits from Internet Data - Current Conditions might be necessary for GIS

Analysis

• Synergy in combining links, feeds & services

rlow@esri.com

Contact information:

Reference: http://www.arcgis.com/home/item.html?id=

9ff56fbe3c4f4b749fd6066424685280