Changes between Version 4 and Version 5 of Grass7/TemporalExtension

Timestamp:

Jul 6, 2011, 1:46:55 PM (13 years ago)

Author:

huhabla

Comment:

--

Grass7/TemporalExtension

@@ -84 +84 @@
 The raster3d spacetime tables are equal to the raster spacetime tablse, except that the spatial extent is computed based on east, west, south, north, top and bottom.
 
-=== Vector spacetime datasets ===
+=== Spacetime vector datasets ===
 
+=== Spacetime vector datasets ===
+
+The spacetime vector datasets have specific attribute which derived from the registered vector maps:
+
+  * The temporal type (absolute, relative)
+  * The spatial extent computed from all registered vector maps (e, w, n, s)
+  * The temporal extent computed from all registered vector maps  (start and end time or duration)
+  * The number of features computed from all registered vector maps (min and max)
+  * temporal resolution
+
+All these table entries are computed or updated via trigger from all registered vector maps when maps are added or removed.
+
+Table layout:
+
+The base and absolute/relative time spacetime tables are equal to the raster/vector and raster3d one.
+
+  * '''Spacetime metadata raster table'''
+    * '''id''' the name of the spacetime vector table
+    * '''Vector register table name''' the name of the table storing the ids (names) of all registered vector maps
+    * '''spatial extent''' (4 columns: e, w, s, n) of all registered vector maps
+    * ...
 
 == New temporal modules ==