ESRI Offers Prototype Shapefile Viewer for Data.gov Data
You can find it here.
The slick part? You can drag a URL of a dataset found on Data.gov right to a dialog box and with the click of a button it’ll be added to the map. The shapefiles are zipped, so the app unzips them, then adds them. The speed was good, at least for the 99,000 points in the file I chose.
Room for improvement (though remember, this is a prototype!): The dataset URL is used as the theme name, so you really have to remember what the dataset is about! There’s no symbology control and keyboard combinations are used for navigation.
via @martenhogeweg
