= '''PostGIS WKT Raster Beta 03 (and up) Working Specifications''' =
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'''Quick Links'''

 * [wiki:WKTRaster WKT Raster Home Page]
 * [wiki:WKTRaster/PlanningAndFunding Planning & Funding]

 * [wiki:WKTRaster/SpecificationWorking01 Working Specifications for Beta 0.1.6]
 * [wiki:WKTRaster/SpecificationWorking03 Working Specifications for Future Versions]

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== '''Objective B03a - Being able to set all the properties of a raster.''' ==
 

'''RT_SetSRID(raster|geometry, integer)'''[[BR]]
'''RT_SetPixelType(raster, band, string)'''[[BR]]
'''RT_SetPixelSize(raster)'''[[BR]]
'''RT_SetNoDataValue(raster, band, value)'''[[BR]]
'''RT_SetGeoReference(raster, string)'''
 
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== '''Objective B03b - Being able to reproject a raster.''' ==
 

'''RT_Transform(raster|geometry, SRID) -> same type as input'''
 
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== '''Objective B03c - Being able to do some base raster operations.''' ==
 

'''RT_Area(raster|geometry) -> double'''[[BR]]
'''RT_Count(raster, value) -> integer'''[[BR]]
'''RT_Resample(raster, pixelsize, method) -> raster'''[[BR]]
'''RT_SelectByValue(raster|geometry, ‘expression’) -> same type as first argument'''[[BR]]
'''RT_Reclass(raster|geometry,string) -> same type as first argument'''[[BR]]
'''RT_MapAlgebra(raster|geometry, [raster|geometry,…], ‘mathematical expression’, ‘raster’ |’geometry’) -> raster/geometry'''[[BR]]
'''RT_Clip(raster|geometry,geometry) -> same type as first argument'''[[BR]]
'''RT_Flip(raster|geometry, ’vertical’|’horizontal’) -> same type as first argument'''


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== '''PostGIS WKT Raster Beta 0.4''' ==
 
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== '''Objective B04a - Being able to convert a raster to standards formats.''' ==
 

'''RT_AsKML(raster|geometry) -> string'''[[BR]]
'''RT_AsSVG(raster|geometry) -> string'''
 
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== '''Objective B04b - Being able to control the validity of a raster.''' ==
 

'''RT_IsEmpty(raster|geometry) -> boolean'''[[BR]]
'''RT_mem_size(raster|geometry) -> integer'''[[BR]]
'''RT_isvalid(raster|geometry) -> boolean'''
 
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== '''Objective B04c - Being able to use other major topological operators''' ==
 

'''RT_Within(raster|geometry A, raster|geometry B)'''[[BR]]
'''RT_Contains(raster|geometry A, raster|geometry B)'''[[BR]]
'''RT_Overlaps(raster|geometry, raster|geometry)'''

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== '''PostGIS WKT Raster Beta 0.5''' ==
 
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== '''Objective B05a - Being able to derive a raster layer from vector layer.''' ==
 

'''RT_Interpolate(points, pixelsize, method) -> raster'''
 
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== '''Objective B05b - Being able to do on rasters most operations available on geometries''' ==
 

'''RT_Centroid(raster|geometry) -> point geometry'''[[BR]]
'''RT_PointOnSurface(raster|geometry) -> point geometry'''[[BR]]
'''RT_Buffer(raster|geometry, double) -> same type as first arg.'''[[BR]]
'''RT_ConvexHull(raster|geometry) -> same type as input'''[[BR]]
'''RT_Difference(raster|geometry A, raster|geometry B) -> same type as first argument'''[[BR]]
'''RT_SymDifference(raster|geometry,raster|geometry,‘raster’|’geometry’) -> raster/geometry'''


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== '''PostGIS WKT Raster Beta 0.6''' ==
 
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== '''Objective B06a - Being able to use all the other topological operators''' ==
 

'''RT_Equals(raster|geometry, raster|geometry)'''[[BR]]
'''RT_Disjoint(raster|geometry, raster|geometry)'''[[BR]]
'''RT_Touches(raster|geometry, raster|geometry)'''[[BR]]
'''RT_Crosses(raster|geometry, raster|geometry)'''[[BR]]
'''RT_Covers(raster|geometry A, raster|geometry B)'''[[BR]]
'''RT_IsCoveredBy(raster|geometry A, raster|geometry B)'''[[BR]]
'''RT_Relate(raster|geometry, raster|geometry, intersectionPatternMatrix )'''
 
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== '''Objective B07b - Being able to edit a raster''' ==
 

'''RT_Value(raster, band, x, y) -> value'''[[BR]]
Return value of a single pixel. Pixel location is specified by 1-based index of Nth band of raster and X,Y coordinates.[[BR]]
The X coordinate is expected to be in range of [1, RT_Width(raster)] and Y coordinate in range of [1, RT_Height(raster))].
Return value is of type of 64-bit float-point number.[[BR]]
'''TODO''': mloskot: Should we return NUMERIC instead of FLOAT8?


'''RT_SetValue(raster, band, x, y, value)'''[[BR]]
'''RT_Affine(raster|geometry,…) -> same type as input'''[[BR]]
'''RT_Translate(raster|geometry,…) -> same type as input'''[[BR]]
'''RT_Scale(raster|geometry,…) -> same type as input'''[[BR]]
'''RT_TransScale(raster|geometry,…) -> same type as input'''[[BR]]
'''RT_RotateZ,Y,Z(raster|geometry, float8) -> same type as input'''

'''Other functions'''
 

'''RT_AsBinary(raster, compression)'''[[BR]]
'''RT_RasterFromWKB(raster, [<srid>])'''[[BR]]
'''RT_RasterFromText(string, [<srid>])'''[[BR]]
'''RT_AsText(raster)'''
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