[Gfoss] [even.rouault a mines-paris.org: Re: [gdal-dev] Geomedia mdb files]

[andrea antonello]

> Qualcuno cercava di aprire gli mdb di recente se non ricordo male ...

Scusa l'ignoranza, proprio non me ne intendo.
Esistono due tipi di mdb diversi, uno della esri (detto anche personal
database) e uno di geomedia?

Ciao
Andrea

>
> ----- Forwarded message from Even Rouault <even.rouault at mines-paris.org> -----
>
> Date: Sat, 22 Jan 2011 16:42:49 +0100
> From: Even Rouault <even.rouault at mines-paris.org>
> Subject: Re: [gdal-dev] Geomedia mdb files
> To: gdal-dev at lists.osgeo.org
> Cc: Christian Andersen <christianhelring at gmail.com>,
>   "Moskovitz,
>        Bob" <Bob.Moskovitz at conservation.ca.gov>
> In-Reply-To: <4CB48DF7.2080302 at pobox.com>
> X-BeenThere: gdal-dev at lists.osgeo.org
> List-Id: "Discussion for developers using and building GDAL/OGR."
>        <gdal-dev.lists.osgeo.org>
>
> Hi,
>
> I've just added a read-only geomedia driver in GDAL trunk (GDAL 1.9.0dev).
> Testing is appreciated.
>
> It would be usefull if someone could provide a small and freely redistribuable
> geomedia .mdb (possibly hand-made with fake data) with different types of
> geometries (1 feature for each geometry type is enough) so that it can be
> included in the autotest suite. For now, it has just been tested with the
> MMSDTestDB.zip attachment found on http://forum.manifold.net/forum/t106539.11
>
> What is mainly missing is SRS support. I see that the GCoordSystem contains
> all the info. For the above example :
>
>  Stor2CompMatrix1 (Real) = 0.3048
>  GeodeticDatum (Integer) = 0
>  Ellipsoid (Integer) = 21
>  EquatorialRadius (Real) = 6378407.621
>  InverseFlattening (Real) = 298.269875040474
>  ProjAlgorithm (Integer) = 2
>  AzimuthAngle (Real) = (null)
>  FalseX (Real) = 247193.2944
>  FalseY (Real) = 0
>  Hemisphere (Integer) = (null)
>  LatOfOrigin (Real) = 41.75
>  LatOfTrueScale (Real) = (null)
>  LonOfOrigin (Real) = -89.4222222222222
>  RadOfStandCircle (Real) = (null)
>  ScaleReductFact (Real) = 1
>  StandPar1 (Real) = 42.9083333333333
>  StandPar2 (Real) = 43.2305555555556
>
> But the GeodeticDatum, Ellipsoid and ProjAlgorithm fields presumably map to
> enumerations, so examples of databases using various SRS (starting with the
> most common ones like lat/long WGS84 and UTM WGS84) with the "text"
> description of the SRS would be necessary to establish this mapping. Unless
> someone knows where to find a spec of this ?
>
> >From the above sample and a bit of googling, I've deduced this is equivalent
> to the following ESRI WKT :
>
> PROJCS["NAD_1983_HARN_Adj_WI_Dane_Feet",GEOGCS["GCS_NAD_1983_HARN_Adj_WI_Dane",DATUM["D_NAD_1983_HARN_Adj_WI_DN",SPHEROID["GRS_1980_Adj_WI_DN",6378407.621,298.269876997368]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Conformal_Conic"],PARAMETER["False_Easting",811000.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-89.42222222222223],PARAMETER["Standard_Parallel_1",42.90833333333333],PARAMETER["Standard_Parallel_2",43.23055555555555],PARAMETER["Latitude_Of_Origin",41.75],UNIT["Foot_US",0.3048006096012192]]
>
> So ProjAlgorithm 2 is likely meaning Lambert_Conformal_Conic_2SP and Ellipsoid
> = 21 = GRS_1980_Adj_WI_DN ?
>
> Best regards,
>
> Even
>
> Le mardi 12 octobre 2010 18:33:59, Frank Warmerdam a écrit :
>> Moskovitz, Bob wrote:
>> > Frank,
>> >
>> > I'm also interested in seeing a Geomedia driver for gdal.  Btw, gvSIG has
>> > a Geomedia plugin (see https://code.google.com/p/extmdb ).  This might
>> > help you figure out how to make a driver for gdal.
>>
>> Bob,
>>
>> Interesting.  Using the extmdb MDBGeometryAdapter.java code it should be
>> possible to fairly easily implement geomedia feature reading in OGR.
>>
>> Anyone interested in taking the task on or funding it?
>>
>> Best regards,
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