Changes between Version 3 and Version 4 of Grass7/TemporalExtension

Timestamp:

07/06/11 13:38:09 (13 years ago)

Author:

huhabla

Comment:

--

Grass7/TemporalExtension

@@ -53 +53 @@
 The new spacetime datasets are handled like raster or vector maps. They are registered in mapset specific tables with creation and modification date and absolute/relative time stamp.
 
-=== Raster spacetime datasets ===
+=== Spacetime raster datasets ===
 
-The raster spacetime datasets store raster map specific attributes and metadata:
-  * The spatial extent (e, w, n, s)
-  * The temporal extent (start and end time or duration)
-  * The data range (min and max)
+The spacetime raster datasets have specific attribute which derived from the registered raster maps:
+
+  * The temporal type (absolute, relative)
+  * The spatial extent computed from all registered raster maps (e, w, n, s)
+  * The temporal extent computed from all registered raster maps  (start and end time or duration)
+  * The data range computed from all registered raster maps (min and max)
+  * The min and max NS resolution computed from all registered raster maps 
+  * The min and max EW resolution computed from all registered raster maps 
   * The raster datatype (CELL, FCELL, DCELL, MIXED)
+  * temporal resolution
 
 All these table entries are computed or updated via trigger from all registered raster maps when maps are added or removed.
@@ -65 +70 @@
 Table layout:
 
-The base spacetime tables are equal to the raster/vector and raster3d one.
+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 raster table
-    * '''temporal type''' relative or absolute
     * '''Raster register table name''' the name of the table storing the ids (names) of all registered raster maps
     * '''spatial extent''' (4 columns: e, w, s,n) of all registered raster maps
-    * '''temporal exten'''t of all registered raster maps
-    * '''data range''' of all registered raster maps
+    * '''data range''' min, max of all registered raster maps (2 columns)
+    * '''Min Max resolution''' the min and max NS and EW resolution (4 columns)
     * ...