Photo of Terence Eden. He has a beard and is smiling.

Terence Eden’s Blog

Should you embed alt text inside image metadata?

By · · 7 comments · 600 words · read ~802 times.

Screenshot showing technical details of the metadata on a photo. It contains a copyright notice.

Not everyone can see the images you post online. They may have vision problems, they may have a slow connection, or they might be using a text-only browser. How can we let them know what the image shows? The answer is alt text. In HTML we can add a snippet of text to aid accessibility. […]

Continue reading →

Reducing GPS accuracy in photos

By · · 2 comments · 150 words

Unix is user-friendly — it's just choosy about who its friends are.

Here's a quick one-liner to reduce the precision of location stored in a photo's EXIF metadata: exiftool -c "%.2f" -TagsFromFile @ -GPSLatitude -GPSLongitude photo.jpg (Thanks to the EXIFtool Forum for their help.) Why is this useful? Modern phones automatically attach a GPS location to every photo you take. GPS resolution is around 10 metres. When […]

Continue reading →