[postgis-devel] gen2 raster iterator tutorial

Pierre Racine Pierre.Racine at sbf.ulaval.ca
Sat Sep 17 05:01:48 PDT 2011


> I'm still writing code, so this isn't on a ticket yet. 

Normally we write a ticket first, then we discuss the strategic implementation and then we write code. 

The direction toward "seamless" vector/raster operation in PostGIS has been taken since a while now. 

I still haven't seen a clear argument demonstrating the flaws of this direction and the advantages in term of simplicity/performance/flexibility/new functionality of a new approach and, still, this is far from being clear when reading this tutorial.

What are the problems encountered in the current approach (vectorize raster when operating in vector mode and rasterize when operation in raster mode) justifying a new one?

What benefit would we have with the new one? What do we lose (if we lose anything)?

What impact would this have on the SQL API? What new functionality does this bring?

This is a basic 1) problem identification, 2) proposed solution, 3) pros and cons methodology. Up to now we've got only 2)...

Pierre



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