Hi Fabian,

happy to ear you so soon,

I'm requested to build a huge database containing meteo observations. There are about 200 meteostations in a given geographic area. Observations are collected by a system that after some software procedures (aggregation, interpolation, ...) generates some mappings in a grid of about 30000 points to feed then model runs. There are 24 such grids for each day during the year, each point of the grid is related to about 20 meteo parameters. The first need we have is to store all these info in a structured way, in the most efficient way. Then there is the need of making some analisys on these data, mainly statistical analisys but also to be able to do spatial queries on them. Time range of analisys could be from one month or less but could also arrive to cover many years, let's say 20 years ..., in the case of climatological analisys. The analisys should be done in the most effective way.

To support these activities we need to write software on our own because we need to integrate an existing system.

I then began to search for database management systems that could be able to manage such data burden and amongst others I've found monetdb that seems to fit the problem we have. It's oriented to scientific data/observations, it has programming bindings in languages as java and C that could make it a profitable solution for us, it's open source (we are using only open source products ...) has some kind of spatial extensions, ... and here we are ...

These are the reasons I'm asking for C API.

In this context though I need to evaluate its usage and so I'm searching for informattions.

Best regards.

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On Fri, Nov 18, 2011 at 8:28 AM, Fabian Groffen <Fabian.Groffen@cwi.nl> wrote:

Hi Luca,

On 18-11-2011 08:20:11 +0100, luca paganotti wrote:
> I'm interested in learning more about monetdb, but I've some difficulties in
> finding the informations I'm searching for.
>
> I would like to learn more about the C API, so I'm searching for some coding
> examples. The only thing I found was presumably an old example (as Stefan
> told me) about mapi usage that unfortunately doesn't work for me with
> monetdb current release (tried both linux and windows releases). I wrote two
> times to the developer list but at the moment no meaningful answer.

I'm affraid the MAPI C-library isn't the best example of a clean and
clear interface. It has many (hidden) complexities that are mastered
currently only be a few of us.

Perhaps you could explain us in what way you intend to use MAPI. Maybe
we can give you a start, or suggest you an alternative way to achieve
your goal.

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