Changes between Version 14 and Version 15 of Grass7/TemporalGISAlgebra

Timestamp:

07/05/13 08:42:02 (11 years ago)

Author:

huhabla

Comment:

--

Grass7/TemporalGISAlgebra

@@ -167 +167 @@
 
 The temporal raster algebra uses all operators and functions of the temporal 
-algebra and adds a subset of the arithmetic operators and function of r.mapcalc.
-
-The method is the same as for the temporal vector algebra. 
-Hence new spatio-temporal operators are defined that include temporal topology relations, 
+algebra and adds a subset of the arithmetic operators and functions from r.mapcalc.
+New spatio-temporal operators are defined that include temporal topology relations, 
 temporal operators and arithmetic operators.
 
 Examples:
-Create the sum all maps from STRDS A and B that have equal time stamps and store the new maps in STRDS C.
+Create the sum of all maps from STRDS A and B that have equal time stamps and store the new maps in STRDS C:
 {{{
 C = A + B
 }}}
-Same expression with explicit definition of the temporal topology relation and temporal operators. 
+Same expression with explicit definition of the temporal topology relation and temporal operators:
 {{{
 C = A {equal,=+} B
 }}}
 Select all cells from STRDS B with equal relations to STRDS A if the cells 
-of A are in the range of [100.0, 1600] of time intervals that have more then 30 days
+of A are in the range of [100.0, 1600] of time intervals that have more then 30 days:
 {{{
 C = if(A > 100 && A < 1600 && td(A) > 30, B)
-
-same as:
-
+}}}
+Same expression with explicit definition of the temporal topology relation and temporal operators:
+{{{
 C = if(equal, A > 100 && A < 1600 {equal,&&} td(A) > 30, B)
 }}}
@@ -195 +193 @@
 {{{
 C = if(Temp > 10.0, Prec / 3600.0 /24.0 / td(Prec))
-
-same as:
-
+}}}
+Same expression with explicit definition of the temporal topology relation and temporal operators:
+{{{
 C = if(equal, Temp > 10.0, Prec / 3600.0 / 24.0 {equal,=/} td(Prec))
 }}}