[postgis-devel] [PostGIS] #902: [raster] ST_MinMax

[PostGIS]

#902: [raster] ST_MinMax
----------------------------+-----------------------------------------------
 Reporter:  dustymugs       |       Owner:  dustymugs            
     Type:  task            |      Status:  assigned             
 Priority:  medium          |   Milestone:  PostGIS Raster Future
Component:  postgis raster  |     Version:  trunk                
 Keywords:                  |  
----------------------------+-----------------------------------------------

Comment(by dustymugs):

 A set of ST_MinMax and ST_ApproxMinMax variations for processing
 coverages:

 1. ST_MinMax(rastertable text, rastercolumn text, nband int, hasnodata
 boolean) -> record

 {{{
 ST_MinMax('tmax_2010', 'rast', 1, FALSE)

 ST_MinMax('precip_2011', 'rast', 1, TRUE)
 }}}

 2. ST_MinMax(rastertable text, rastercolumn text, nband int) -> record

   hasnodata is set to FALSE

 {{{
 ST_MinMax('tmax_2010', 'rast', 1)
 }}}

 3. ST_MinMax(rastertable text, rastercolumn text, hasnodata boolean) ->
 record

   nband is set to 1

 {{{
 ST_MinMax('precip_2011', 'rast', TRUE)
 }}}

 4. ST_MinMax(rastertable text, rastercolumn text) -> record

   nband is set to 1 and hasnodata is set to FALSE

 {{{
 ST_MinMax('tmin_2009', 'rast')
 }}}

 Variations for ST_ApproxMinMax are:

 1. ST_ApproxMinMax(rastertable text, rastercolumn text, nband int,
 hasnodata boolean, sample_percent double precision) -> record

 {{{
 ST_ApproxMinMax('tmax_2010', 'rast', 1, FALSE, 0.5)

 ST_ApproxMinMax('precip_2011', 'rast', 1, TRUE, 0.2)
 }}}

 2. ST_ApproxMinMax(rastertable text, rastercolumn text, nband int,
 sample_percent double precision) -> record

   hasnodata is set to FALSE

 {{{
 ST_ApproxMinMax('tmax_2010', 'rast', 1, 0.5)

 ST_ApproxMinMax('precip_2011', 'rast', 1, 0.2)
 }}}

 3. ST_ApproxMinMax(rastertable text, rastercolumn text, hasnodata boolean,
 sample_percent double precision) -> record

   nband is set to 1

 {{{
 ST_ApproxMinMax('tmax_2010', 'rast', FALSE, 0.5)

 ST_ApproxMinMax('precip_2011', 'rast', TRUE, 0.2)
 }}}

 4. ST_ApproxMinMax(rastertable text, rastercolumn text, sample_percent
 double precision) -> record

   nband is set to 1 and hasnodata is set to FALSE

 {{{
 ST_ApproxMinMax('tmax_2010', 'rast', 0.5)

 ST_ApproxMinMax('precip_2011', 'rast', 0.2)
 }}}

 5. ST_ApproxMinMax(rastertable text, rastercolumn text) -> record

   nband is set to 1, hasnodata is set to FALSE and sample_percent is set
 to 0.1

 {{{
 ST_ApproxMinMax('tmax_2010', 'rast')

 ST_ApproxMinMax('precip_2011', 'rast')
 }}}

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/902#comment:9>
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