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= Geo Waypoint Trails =
= Geo Waypoint Trails =
An exploration of publishing trail or boundary information using series of Geo data waypoints.


[http://en.wikipedia.org/wiki/Waypoint Waypoints] are geographic points, as currently published using the [[geo]] microformat.
An exploration of publishing information about sequences of geographical points using series of Geo (or other) microformats.
__TOC__
==Terms==


Presented sequentially, they can describe trails or routes (which may or may not have been traversed at specific times) or boundaries (which may be on any scale, from a small garden to a continent).
Conceptually, a collection of points, with no sequential relationship (the county towns of England, say, or all skyscrapers in New York), is deemed a collection (or set) of individual [http://en.wikipedia.org/wiki/Waypoint Waypoints]. A sequentially-ordered collection of points may be expressed as a '''track''' or a '''route'''. Tracks are a record of where a person has been, routes are suggestions about where they might go in the future. So, for instance, there might be timestamps for each point in a track (because someone is recording where ''and when'' they were there), but timestamps for each point in a route are unlikely to be provided, because the author is suggesting it, and nobody might ever have travelled it.
 
A route which ends at its beginning may also describe a boundary (also called a box or polygon). A boundary may be for an object or area on any scale, from a small building or plot of land to a continent, at any level of granularity.
 
It may therefore be appropriate to use a sequence of hCalendar microformats for tracks and of hCard microformats for routes, boundaries and waypoints.


== The Problem ==
== The Problem ==
Line 23: Line 28:
===Collections===
===Collections===
*[http://www.poi66.com/ POI66]
*[http://www.poi66.com/ POI66]
**example: [http://www.poi66.com/maps/show_earth.php?album=adelaarspad&lat=52.38035&lon=4.89872&extent=0.1&scale=126400#p214738&text=Waypoint%201 Amsterdam CS-Alkmaar CS walking route] (n.b long page; 612 waypoints)
**example: [http://www.poi66.com/maps/show_album?album=adelaarspad Amsterdam CS-Alkmaar CS walking route] (n.b long page; 612 waypoints)
**relevant mark-up: <code><nowiki><li><div>waypoint 10<br/>Latitude 52.386165<br/>Longitude 4.91199</div></li></nowiki></code>
**relevant mark-up: <s><code><nowiki><li><div>waypoint 10<br/>Latitude 52.386165<br/>Longitude 4.91199</div></li></nowiki></code></s>
  <pre><nowiki>
  <tr>
  <td>10</td>
  <td>
    <div class="geo">
      <span class="latitude">52.38616</span><br/>
      <span class="longitude">4.91199</span>
    </div>
  </td>
  <td ><a href="...">Waypoint 10</a></td>
  <td >Amsterdam (3 km) <a title="" href="...">Map</a></td>
  </tr>
</nowiki></pre>


===Other===
===Other===
Line 38: Line 56:
   </wpt>
   </wpt>
</nowiki></pre>
</nowiki></pre>
===Existing formats===
A number of other formats (which route/ track parsers may wish to export) are listed at http://www.gpsbabel.org/capabilities.html
===Tools===
*[http://www.gpsbabel.org/ GPS Babel] is a free command line utility (there is a GUI, but it has limited functionality) for converting between these formats.
*[http://www.gpsvisualizer.com/ GPS Visualizer] reads a variety of GPS formats <blockquote>including but not limited to: GPX, OziExplorer, Geocaching.com (.loc), IGC sailplane logs, Garmin Forerunner (.xml/.hst/.tcx), Timex Trainer (v1.3+), Cetus GPS, PathAway, cotoGPS, CompeGPS, TomTom (.pgl), IGN Rando (.rdn), Emtac Trine, Suunto X9/X9i (.sdf), NetStumbler/WiFiFoFum, GPSManager, MS Excel, and of course tab-delimited or comma-separated text</blockquote> and converts them, maps them, or outputs a graphical representation or plain-text list.


===Typical mandatory attributes===
===Typical mandatory attributes===
Line 45: Line 70:


===Typical optional attributes===
===Typical optional attributes===
*timestamp
*elevation
*elevation
*image
*image
Line 51: Line 77:


==Issues==
==Issues==
*How to differentiate between a trail (for example in the shape of a letter "U") and a boundary - in other words, to say whether or not, after the last point, the line returns to the first.
*How to indicate that a set of waypoints is a specific, but unordered, collection (i.e. a set of all the metro stations in Paris, and another set of all the underground stations in London, may be published on the same page)
*How to sequence/ timestamp waypoints
**KML uses "Folder" for each such set. e.g [http://tinyurl.com/32o6lm]
**Perhaps using [[hatom|hAtom]] and/ or [[hcalendar|hCalendar]]?
*How to sequence routes
**Perhaps using order in source code, ordered lists, [[hcalendar|hCalendar]] or [[hatom|hAtom]]?
**We could use [[hatom|hAtom]] and the feed category to distinguish between ordered, unordered and polygons.
***hAtom requires both an author and date, neither of which are required for routes or polygons. [[User:AndyMabbett|Andy Mabbett]]
*How to timestamp tracks (timestamps imply a chronological sequence)
**Perhaps using [[hcalendar|hCalendar]]?
*How to differentiate between a route (for example in the shape of a letter "U") and a boundary (or polygon) - in other words, to say whether or not, after the last point, the line returns to the first.
**Suppose we use <code>class="folder"</code> for a sequence (per KML; see above). We could have <code>class="folder route"</code> or <code>class="folder polygon"</code>.
*What can we learn, or use, from the GPX (XML schema for GPS data) specification?
 
==References==
*[http://dublincore.org/documents/dcmi-box/ DCMI Box Encoding Scheme]


== See Also ==
== See Also ==
{{geo-related-pages}}
{{geo-related-pages}}

Latest revision as of 00:51, 17 February 2021

Geo Waypoint Trails

An exploration of publishing information about sequences of geographical points using series of Geo (or other) microformats.

Terms

Conceptually, a collection of points, with no sequential relationship (the county towns of England, say, or all skyscrapers in New York), is deemed a collection (or set) of individual Waypoints. A sequentially-ordered collection of points may be expressed as a track or a route. Tracks are a record of where a person has been, routes are suggestions about where they might go in the future. So, for instance, there might be timestamps for each point in a track (because someone is recording where and when they were there), but timestamps for each point in a route are unlikely to be provided, because the author is suggesting it, and nobody might ever have travelled it.

A route which ends at its beginning may also describe a boundary (also called a box or polygon). A boundary may be for an object or area on any scale, from a small building or plot of land to a continent, at any level of granularity.

It may therefore be appropriate to use a sequence of hCalendar microformats for tracks and of hCard microformats for routes, boundaries and waypoints.

The Problem

To allow the publishing of series of waypoints in such a way that they are downloadable and that their ordering is parsable.

Participants

Real-World Examples

Collections

  <tr>
  <td>10</td>
  <td>
    <div class="geo">
      <span class="latitude">52.38616</span><br/>
      <span class="longitude">4.91199</span>
    </div>
  </td>
  <td ><a href="...">Waypoint 10</a></td>
  <td >Amsterdam (3 km) <a title="" href="...">Map</a></td>
  </tr>

Other

  <wpt lat="39.921055008" lon="3.054223107"> 
  <ele>12.863281</ele> 
  <time>2005-05-16T11:49:06Z</time> 
  <name>Cala Sant Vicenç - Mallorca</name> 
  <sym>City</sym> 
  </wpt>

Existing formats

A number of other formats (which route/ track parsers may wish to export) are listed at http://www.gpsbabel.org/capabilities.html

Tools

  • GPS Babel is a free command line utility (there is a GUI, but it has limited functionality) for converting between these formats.
  • GPS Visualizer reads a variety of GPS formats

    including but not limited to: GPX, OziExplorer, Geocaching.com (.loc), IGC sailplane logs, Garmin Forerunner (.xml/.hst/.tcx), Timex Trainer (v1.3+), Cetus GPS, PathAway, cotoGPS, CompeGPS, TomTom (.pgl), IGN Rando (.rdn), Emtac Trine, Suunto X9/X9i (.sdf), NetStumbler/WiFiFoFum, GPSManager, MS Excel, and of course tab-delimited or comma-separated text

    and converts them, maps them, or outputs a graphical representation or plain-text list.

Typical mandatory attributes

  • Latitude (WSG84, using decimal or degrees-minutes-seconds values)
  • Longitude (ditto)
  • text label

Typical optional attributes

  • timestamp
  • elevation
  • image
  • note ?
  • url ?

Issues

  • How to indicate that a set of waypoints is a specific, but unordered, collection (i.e. a set of all the metro stations in Paris, and another set of all the underground stations in London, may be published on the same page)
    • KML uses "Folder" for each such set. e.g [1]
  • How to sequence routes
    • Perhaps using order in source code, ordered lists, hCalendar or hAtom?
    • We could use hAtom and the feed category to distinguish between ordered, unordered and polygons.
      • hAtom requires both an author and date, neither of which are required for routes or polygons. Andy Mabbett
  • How to timestamp tracks (timestamps imply a chronological sequence)
  • How to differentiate between a route (for example in the shape of a letter "U") and a boundary (or polygon) - in other words, to say whether or not, after the last point, the line returns to the first.
    • Suppose we use class="folder" for a sequence (per KML; see above). We could have class="folder route" or class="folder polygon".
  • What can we learn, or use, from the GPX (XML schema for GPS data) specification?

References

See Also

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