[postgis-devel] Raster Support

[Joao Argemiro de C. Paiva]

Dear Paul,
certainly we would like to contribute with the Development of PostGis.
We know that you are now working with the development of the Spatial 
Operators for vector
data, but we'll continue with this development, primarily because Terralib 
will support different
databases, and we need this kind of functionality. The algorithms will also 
be put into
Postgres as part of the student work, and we can share later our results.
Terralib will also allow the storage of images inside the database, and we 
plan to have a set of
operators for this type of data. We hope within the next couple of months 
to have a more
elaborated document with the necessary requirements and development goals. 
Once we
have that we'll contact you and see how we could contribute more 
effectively with the development
of PostGis.

Sincerely.

Joao


At 01:51 PM 5/21/2002 -0700, you wrote:

>Jaoa,
>   I had an opportunity to speak with Gilberto on the phone while he was
>up here in BC last week. He told me about INPE, and some of the (rather
>amazing) stuff you are doing and have done. We would like to re-iterate
>our invitation to INPE to be involved in the development of PostGIS and
>advanced functionality in PostGIS. I understand the TerraLib project
>will make use of PostGIS, and we definately want to be able to support
>it!
>   The major development you will see discussed on this list primarily is
>the "Topological Operators for PostGIS" project being done with the
>University of Victoria. We hope to have a basic object model done, and
>code into CVS within two weeks. At that point it is possible that we can
>parallelize some of the development of various portions of the project,
>and INPE developers could help. When we get to that point, it is
>possible that we can look over what is to be done and find chunks which
>can be done in parallel. (Perhaps, Martin, you could think about which
>chunks of the binary predicates are separable.)
>   The other possibility which Gilberto and I discussed was that INPE
>take up the raster support in PostGIS and advance it. Right now, the
>support consists of the CHIP structure, but there are only a few
>functions which support CHIP, and no direct indexing support on it (we
>have been indexing with proxy columns for our own internal purposes).
>Things like a GDAL->PostGIS(CHIP) importer/exporter, a tie in from CHIP
>to TerraLib, some internal functions for handling chip databases (like
>mosaic(CHIP)), a tie in to OSSIM, could all the important additions to
>raster handling. As a remote sensing organization, you probably have a
>better feel for the potential of raster database storage than we do.
>   Fundamentally, I hope to get INPE involved in development one way or
>another as soon as you want to get involved!
>   I think INPE should (a) decide what it wants to be involved in (b)
>outline some development goals. We are open to providing full CVS access
>to the code base. Our only stricture is that changes be incremental and
>non-destructive (no "I am just tearing it apart for a while and will put
>it back together real soon when my new design works" development) so
>that everyone can work together in harmony (changing structures without
>discussion is a no-no :).
>
>Looking forward to great things,
>Paul
>
>
>--
>       __
>      /
>      | Paul Ramsey
>      | Refractions Research
>      | Email: pramsey at refractions.net
>      | Phone: (250) 885-0632
>      \_
>
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