[Qgis-developer] Reading a new type of file natively in QGIS

Pedro Camargo veigacamargo at gmail.com
Thu Dec 11 20:21:57 PST 2014

Hi group,
                During my discussions with people from the transportation
modeling world, some people pointed out a few features that would be nice
to have in order to use QGIS more intensively by our group.

                The most important issue, however, was the possibility of
open matrices in a very efficient way (reading matrices that are
10.000x10.000 in dbf format means reading 10e8 lines, which takes a VERY
long time and defeats the purpose of using QGIS for some things.

                A very good alternative would be using an open source
format from the project "open model data"  (
https://sites.google.com/site/openmodeldata/) which is based on HDF5.

                I see that QGIS can already open raster data in HDF5
format, but in this case, the data would be a matrix with indices and all.

               I regret to say that my programming skills, specially in
C/C++ are not nearly good enough to evaluate the effort that it would take
include such support and have, inside QGIS, a possibility of viewing such
matrices, which would allow people from the transportation world (and I am
the first volunteer) to develop the necessary plugins to manipulate the
matrices and generate the commonly used statistics.

              Can anybody tell me what type of effort it would take and if
it is at all of interest of the QGIS community?

Thanks a lot,

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