multimedia

Photo Geotagging Tutorial for KDMC

The Knight Digital Media Center at UC Berkeley has published my tutorial on Geotagging and Mapping Photos. In it, I go through a set of steps on how to assign location data to images shot on a digital camera and how to use the results to put the images in an online map.

The KDMC guys wanted me to use a specific set of tools: an Amod AGL3080 GPS Data Logger, HoudahGeo phototagging software, Excel, and ZeeMaps.

All of the tools worked great for me—although there was a general failure of the Amod GPS trackers when we tried to download the geodata during our December workshop, so proceed carefully if you choose to use one of those. (I would love any recommendations on other GPS devices for this purpose). The basic workflow is as follows:

shoot photos while GPS tracker is activated —> edit photos —> load photos and GPS data into HoudahGeo —> create .csv file from matched data —> load .csv into ZeeMaps

There are some key details to remember. Make sure the clock on your digital camera is set properly; this is how the GPS data, which records time along with location, is matched with the images. When editing photos, don’t lose your EXIF (time) meta data. And be sure to read the procedures for creating the .csv file in Excel, separating data into columns, etc.—there are a few spots where little mistakes can mess up the file. The procedure, overall, is quite simple.

The biggest surprise, and a pleasant one at that, was ZeeMaps. The service is built on Google Maps, so the output both looks familiar and can be embedded into a variety of contexts. But the real strength of ZeeMaps is the variety of options it gives you: besides the ability to upload .csv files, which can include thousands of data points, there is room for a lot of configuration when it comes to adding different kinds of information and configuring the map for embedding.

That said, the results aren’t perfect. For example, more control over how photos are displayed would be nice to have. And there’s no way to trace out the path that the GPS logger recorded as I walked down side streets and over hills. Other programs do this, but neither my colleagues nor I have found a good service or program that combines all the features we’re looking for. ZeeMaps has the potential to become that, depending on what kind of features it develops. The tech people are incredibly responsive—when I sent a tech inquiry they responded in about a day and plan to incorporate a new feature as a result. I know that the new iPhoto will have photo-mapping capabilities, but have not yet had a chance to try it. I suspect the search for the perfect photo+geodata+display app will go on.

Here is a simple test map I created last month. I’ve also created a map of places I lived on the geobiography page.

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  1. Pingback: Posts about Google as of January 12, 2009 | The Lessnau Lounge

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