In a previous post, Geocoded Lightroom Web Gallery Plugin – Part 1, I discussed the concept of a geocoded Lightroom plugin for producing Web galleries, outlined what I wanted it to do, and showed the look-and-feel of a prototype design. In Part 2, I’ll discuss the view “under the hood”, detailing how to use GPS EXIF information in a Lightroom Web Gallery plugin. This information is intended for plug-in developers and those intrepid souls who want to understand what lies beneath the surface of a Lightroom gallery engine. It isn’t my intention to make this series of posts a definitive guide to Lightroom gallery engine design or anatomy. Instead, I’d recommend starting with the Lightroom SDK 2.0 Programmers Guide and Lightroom 2 SDK available from Adobe. The Adobe guide is a good starting point, but you can learn even more by dissecting an actual gallery engine, including those that are included in the SDK.
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After geocoding a few of my photographs, I looked for an Adobe® Lightroom® plugin that would produce a geocoded Web gallery. No joy. So I decided to do some research and embarked on a mission to create a LR plugin that met my specifications. I wanted an HTML gallery with no Flash. Having used JAlbum to produce HTML photo galleries in the past, and having tried the available LR HTML gallery plugins including the default LR HTML gallery, LRG One PayPal, TTG Highslide Gallery, and TTG HTML Gallery, I had a pretty good idea of what I wanted:

• Geocoding
• EXIF display
• Tooltips
• Drop-down menus
• PayPal shopping cart “enabled”
• Simple, clean appearance
• Small unobtrusive icons
• No Flash

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