Re: [gdal-dev] Map algebra

2016-04-02 Thread Ari Jolma
02.04.2016, 16:08, Even Rouault kirjoitti: . - there seems to be a block cache mechanism. What is it for ? How does that work ? In the block loop (looping through all blocks in a band) at each step the cache is checked for block(s) that are needed (if focal distance is > 0 then more than one

Re: [gdal-dev] Map algebra

2016-04-02 Thread Ari Jolma
02.04.2016, 16:08, Even Rouault kirjoitti: - Are the methods handling 2 bands able to deal with different block sizes ? Yes, the band size needs to be the same Not sure to understand your answer: my question was rather about block sizes. I forgot a "however": Yes, the block sizes can differ

Re: [gdal-dev] Map algebra

2016-04-02 Thread Peter Baumann
see also rasdaman with its n-D raster query language based on Array Algebra, which effectively is the basis for the forthcoming ISO Array SQL standard: http://www.rasdaman.org publications: http://www.faculty.jacobs-university.de/pbaumann/iu-bremen.de_pbaumann//pubs.php cheers, Peter On 04/02/20

Re: [gdal-dev] Map algebra

2016-04-02 Thread Even Rouault
Le samedi 02 avril 2016 14:48:15, Ari Jolma a écrit : > 02.04.2016, 15:15, Even Rouault kirjoitti: > > A few thoughts and questions : > > - I guess what would be cool from the perspective of a C++ user is to be > > really to write the above pseudo code with C++ operator overload when > > appropriat

Re: [gdal-dev] Map algebra

2016-04-02 Thread Ari Jolma
02.04.2016, 15:15, Even Rouault kirjoitti: A few thoughts and questions : - I guess what would be cool from the perspective of a C++ user is to be really to write the above pseudo code with C++ operator overload when appropriate ! A += B, A.min(B), min_A= A.min(), etc... Operator overloading i

Re: [gdal-dev] GDAL/OGR 2.1.0 Beta 1 Available

2016-04-02 Thread Jeff McKenna
On 2016-04-01 2:18 PM, Even Rouault wrote: Hi, Despite the date, I do have prepared the GDAL/OGR 2.1.0 Beta1 release. It will potentially be followed by a second beta in the second half of this month, or directly by a RC1 if things go well. The source is available at: Hi Even, So far so go

Re: [gdal-dev] Map algebra

2016-04-02 Thread Even Rouault
Le vendredi 01 avril 2016 10:38:48, Ari Jolma a écrit : > I've got this into a rather nice working shape. The code needs to be > reorganized (it is now, horror, all in header files) but that's another > thing. From the perspective of people wanting to use the core mechanisms to extend with their