location: Difference between revisions
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* velocity (perhaps with a specific motion vector in 2 or 3 dimensions) | * velocity (perhaps with a specific motion vector in 2 or 3 dimensions) | ||
* mode of motion / transport (e.g. walking, running, bicycling, driving, stationary) | * mode of motion / transport (e.g. walking, running, bicycling, driving, stationary) | ||
== Brainstorming == | |||
[http://indiewebcamp.com/note#Location Location in Notes] discusses some of the issues in adding a location to a note. | |||
The two most common visual elements in presenting location are a textual description of the location and/or a map. | |||
=== Textual Description === | |||
There is an issue of specificity. With all of the details possible in a address, relevancy can be reduced if you add in all the possible details. | |||
For example, to use the site of IWC Cambridge... | |||
'''The Ray and Maria Stata Center, 32 Massachusetts Institute of Technology, Vassar Street, MIT, Cambridge, Middlesex County, Massachusetts, USA, 02139-4309''' | |||
The most common textual description is merely the city, state, and country....Cambridge, Massachusetts, USA. | |||
== See Also == | == See Also == | ||
Revision as of 03:57, 6 July 2015
This article is a stub. You can help the IndieWeb wiki by expanding it.
location is a key aspect of checkin and event posts. It's also sometimes an aspect of posts in general, e.g. where a note or photo/video was posted from. The aspect of location is sometimes referred to as geo for short.
Enabling Technologies
- Markup / microformats
- Data exchange
- Location Services
- Venues database
- OpenStreetMap API and data access
- Geonames Web Services
- findNearbyPlaceName used by StatusNet
How
How to determine the location of a microformat
To accommodate various different location use-cases, there are multiple places within a microformat structure where location data can be placed. Given a microformat, to determine it’s location:
- create a stack of property maps where location data might be found, in order of priority
- for each potential location property, search the stack for a valid property value
In more detail (pseudocode):
- given a microformat structure mf, to find the location it represents:
- let location-sources be a list of microformats, containing the following, in this order:
- mf
- if mf has a location property which is a microformat, that value
- if mf has an adr property which is a microformat, that value
- if mf has a geo property:
- if the geo property is a microformat, that value
- else if the geo property is a string, parse it as a geo: URL and append a derived microformat containing the properties of the geo: URL: latitude+longitude if they’re both present, and altitude if it was present
- for each of the following location properties, search the property map stack in order of priority for a valid value. As soon as one is found, consider that the value. If none are found, the microformat does not have this property
- street-address
- extended-address
- post-office-box
- locality
- region
- postal-code
- country-name
- label
- latitude
- longitude
- altitude
Motion
Location information may also contain indication about motion, e.g. a person at a location, but in motion, by some method. Such information in practice includes things like:
- velocity (perhaps with a specific motion vector in 2 or 3 dimensions)
- mode of motion / transport (e.g. walking, running, bicycling, driving, stationary)
Brainstorming
Location in Notes discusses some of the issues in adding a location to a note.
The two most common visual elements in presenting location are a textual description of the location and/or a map.
Textual Description
There is an issue of specificity. With all of the details possible in a address, relevancy can be reduced if you add in all the possible details.
For example, to use the site of IWC Cambridge...
The Ray and Maria Stata Center, 32 Massachusetts Institute of Technology, Vassar Street, MIT, Cambridge, Middlesex County, Massachusetts, USA, 02139-4309
The most common textual description is merely the city, state, and country....Cambridge, Massachusetts, USA.