Today, I’ve compiled a short video showcasing one of the possible uses of Time Manager plugin: Storm tracking. (Storm data can be downloaded from www.nhc.noaa.gov.)
Point size shows storm class, labels read maximum speed in mph.
If you are using Time Manager for your work, I’d love to hear about it.
“-T”, this small appendix can be found after many popular GIS-related acronym. But of course, it always means something different. Take for example GIS-T (GIS for Transportation), WFS-T (Transactional WFS) and WMS-T (WMS with time support). The world of acronyms is a fun place!
Let’s see what a WMS-T can do for us. From the WMS standard:
Some geographic information may be available at multiple times (for example, an hourly weather map). A WMS
may announce available times in its service metadata, and the GetMap operation includes a parameter for
requesting a particular time. […] Depending on the context, time
values may appear as a single value, a list of values, or an interval, …
Currently, only Mapserver supports WMS-T but the Geoserver team is working on it.
MapServer 4.4 and above provides support to interpret the TIME parameter and transform the resulting values into appropriate requests.
Time attributes are specified within the metadata section:
METADATA
"wms_title" "Earthquakes"
"wms_timeextent" "2011-06-01/2011-07-01"
"wms_timeitem" "TIME"
"wms_timedefault" "2011-06-10 12:10:00"
END
Mapserver supports temporal queries for single values, multiple values, single range values or even multiple range values:
...&TIME=2011-06-10&...
...&TIME=2011-06-10, 2004-10-13, 2011-06-19&...
...&TIME=2011-06-10/2011-06-13&...
...&TIME=2011-06-10/2011-06-15, 2011-06-20/2011-06-25&...
GeoSolutions has developed support for TIME and ELEVATION dimensions in WMS.
There are plans to backport this feature to the stable 2.1.x series after the 2.1.1 release.
Configuration of time-enabled layers can be done via the normal user interface:
The following video by GeoSolutions demonstrates the use of Geoserver’s WMS-T:
Both server solutions seem to support only one time attribute per layer. An optional second time attribute would be nice to support datasets with start and end time like Time Manager for QGIS does.
We are pleased to announce the release of Time Manager version 0.3. New features include:
Time Manager user guide
Time Manager is available through QGIS Plugin repo. Give it a try!
VisualEyes is an online tool developed at the University of Virginia. It allows you to combine images, maps, charts, video and data into interactive dynamic visualizations.
The examples offer multiple map layers, charts and of course a time slider to navigate through time.
VisualEyes example: Jefferson's Travels to England
Check out: www.viseyes.org.
Kudos to radek at gis.stackexchange.com.
The aim of Time Manager plugin for QGIS is to provide comfortable browsing through temporal geodata. A dock widget provides a time slider and a configuration dialog for your layers to manage.
a wildlife telemetry dataset managed by Time Manager
Time Manager filters your vector datasets and displays only features with timestamps in the user specified time frame.
two views of the scenery, using a two-days time frame
Give it a try! The project website can be found at http://anitagraser.github.com/TimeManager/.
Free and Open Source GIS Ramblings 