As access to real or near real-time data feeds becomes faster, easier, and less expensive, you will need ways to consume this data and view it in different applications. One example of a real-time data feed is GeoRSS. You've probably heard a lot about GeoRSS lately. Really Simple Syndication (RSS) is the most well-known web feed because it can be extended to publish any sort of itemized data to an application, but GeoRSS has gained popularity in the last few years because it has an added benefit: location or geographic coordinates are encoded as part of the web feed. This allows web developers to add geographically referenced data feeds to web applications.
Here's how to do that using, as an example, a GeoRSS feed from the United States Geological Survey (USGS) on recent high-magnitude earthquakes.
Step 1: Turn on the Data Interoperability extension in ArcMap by clicking Customize, pointing to Extensions, and clicking Data Interoperability.
Step 2: Add a new interoperability connection in the Catalog window in ArcMap by expanding the Catalog window and double-clicking Add Interoperability Connection.
Step 3: Once the Interoperability Connection dialog box opens, click the ellipsis button next to the Format input box.
Step 4: Browse to GeoRSS/RSS Feed within the gallery. Select it and click OK.
Step 5: Copy and paste the GeoRSS URL for worldwide earthquakes greater than magnitude 5 from the USGS website (earthquake.usgs.gov/earthquakes/catalogs/eqs7day-M5.xml) into the Dataset input box, then click OK. You can change the parameters of how the feed is parsed out by clicking the Parameters button. You now have a new connection in the Catalog window.
Step 6: Drag and drop the Entry Point layer into your active ArcMap data frame to view the data.. Once in ArcMap, you can symbolize the data as you see fit and begin to query and analyze this new dataset.
Step 7: Once the data is added to ArcMap, it's a static snapshot of the feed at the time it was added. To handle updates, the data frame or layer must be refreshed. Right-click the layer and choose Refresh from the menu to pull down the most up-to-date information.