Geocoding is the process of turning a physical address into a location on a map. Using data sets to build customized maps is a powerful way to visualize addresses.
Google Maps has long offered an API that allows developers to create custom maps for their own websites. The Maps API, currently on version 3, requires development abilities beyond those of the average auctioneer. Fortunately, there is an easy way for anyone to take a spreadsheet full of addresses and plot them on a map.
Enter: Batchgeo. By providing what is essentially a front-end to the Google Maps API, this free service allows anyone to upload or copy and paste data and receive a customized Google Map. This map can be printed, shared, emailed, embedded on any website or downloaded to Google Earth. By mapping the appropriate columns from your uploaded spreadsheet, you can make each pin show additional information, such as the specific address or the sales, when clicked.
Geocoding is a very powerful method of representing information. Batchgeo is one of many available services that just happens to be free. Have you found better luck with other geocoding services? Let us know in the comments.