I've had a hard time "getting" RDF (e.g. how it differs from XML), but this article helps give it context. The semantic web is being built simultaneously from the bottom up and top down. Typifying the bottom-up approach, RDF content is machine-readable at the outset; powerful but complex (with several advantages over microformats), RDF is all about inter-operability. Top-down approaches introduce "metadata sprinkling" to existing content, simple but limiting by comparison e.g. microformats (using CSS class attributes as in hCard), or meta elements (meta tags such as those for geo-discovery). Both approaches are valid, but RDF is hard whereas microformats help "the rest of us" contribute to the semantic web. There may be a collision ahead, however, between microformats and RDFa (sprinklings of RDF embedded in existing XHTML).
Tag archive for 'metadata'
Like many Mac users I archive my pictures in iPhoto, largely because I enjoy the tight integration this affords with Apple and third-party apps that might want to use them. Having entered the world of geotagging I was disappointed to discover that iPhoto can fail to show coordinates in EXIF (and when shown, oddly lists them under Exposure), does not recognise location data in IPTC headers, and does not provide any "show on map" facility (even Preview does this). Norbert Doerner of West-Forest-Systems then pointed out that I'd completely neglected archive and retrieval of geotagged images in my "ABC" article. This Mac software critique goes some way to redress that omission by considering the role of CDFinder in a Mac user's geotagging workflow. CDFinder is essentially an asset manager that catalogues any file on any volume (CD-ROM, DVD, USB drive, etc). But media metadata are its speciality, and this indexing powerhouse has recently been extended to handle geotags and provide related functionality.
Continue reading 'CDFinder in the Mac geotagging workflow'
FeedDemon, purportedly the most popular Windows-based feed reader, automatically detects geotagged feed items. Form version 2.6.1b1 it uses the Geotag Icon as a visual identifier for plotting the location, "hidden" in metadata, via Google Maps. FeedDemon has lots of other great features, including synchronisation with NewsGator Online which I use when travelling (in conjunction with NetNewsWire on the Mac).
iCab—the Internet taxi for your Mac—now sports the Geotag Icon. Alexander Clauss' latest beta (4.0.1b39) enables the status bar Geotag Icon when metadata tags are detected in the page being viewed, generating a pop-up that will plot the geotagged location using Google Maps. iCab has a number of other noteworthy features, including full compatibility with the WYSIWYG editor in WordPress (unlike Safari or Firefox as of this writing). David has some screen captures on his site.
Continuing the recent geo-fixation trend evident on this site, this article shares the results of a slightly deeper delve into GeoRSS and looks at a great browser add-on that offers auto-discovery of geotagged content in webpages and in some feeds.
Continue reading 'Mapping fun with GeoRSS and geo-discovery'
This article considers geotagging photos from a Mac perspective, looking at automatic and manual methods, and explaining terms such as data loggers, track points, waypoints, and routes. It lists OS X software options for connecting to data loggers, converting track log formats, geo-locating photos, and writing that data to EXIF for both raw and JPEG images. It also covers the importance of time synchronization, what you can do with geotagged photos, workflow, choosing a data logger and controlling it from your Mac.
Continue reading 'An ABC of geotagging photos on the Mac'
