I have captured the transform used as a test case on the matrix branch if
you would like to look into it easily.
It appears as if the matrix branch ( based off master) and 2.7.x end up
with two different transformation chains ...
First matrix branch:
CONCAT_MT[INVERSE_MT[PARAM_MT["Mercator_1SP",
PARAMETER["semi_major", 6378137.0],
PARAMETER["semi_minor", 6378137.0],
PARAMETER["latitude_of_origin", 0.0],
PARAMETER["central_meridian", 0.0],
PARAMETER["scale_factor", 1.0],
PARAMETER["false_easting", 0.0],
PARAMETER["false_northing", 0.0]]],
PARAM_MT["Molodenski",
PARAMETER["dim", 2],
PARAMETER["dx", 0.0],
PARAMETER["dy", 0.0],
PARAMETER["dz", 0.0],
PARAMETER["src_semi_major", 6378137.0],
PARAMETER["src_semi_minor", 6356752.314245179],
PARAMETER["tgt_semi_major", 6378388.0],
PARAMETER["tgt_semi_minor", 6356911.9461279465]],
PARAM_MT["Transverse_Mercator",
PARAMETER["semi_major", 6378388.0],
PARAMETER["semi_minor", 6356911.9461279465],
PARAMETER["central_meridian", -8.131906111111114],
PARAMETER["latitude_of_origin", 39.666666666666664],
PARAMETER["scale_factor", 1.0],
PARAMETER["false_easting", 200000.0],
PARAMETER["false_northing", 300000.0]]]
And GeoServer 2.7.x:
CONCAT_MT[INVERSE_MT[PARAM_MT["Mercator_1SP",
PARAMETER["semi_major", 6378137.0],
PARAMETER["semi_minor", 6378137.0],
PARAMETER["latitude_of_origin", 0.0],
PARAMETER["central_meridian", 0.0],
PARAMETER["scale_factor", 1.0],
PARAMETER["false_easting", 0.0],
PARAMETER["false_northing", 0.0]]],
PARAM_MT["Ellipsoid_To_Geocentric",
PARAMETER["dim", 2],
PARAMETER["semi_major", 6378137.0],
PARAMETER["semi_minor", 6356752.314245179]],
PARAM_MT["Affine",
PARAMETER["num_row", 4],
PARAMETER["num_col", 4],
PARAMETER["elt_0_0", 1.0000045980161443],
PARAMETER["elt_0_1", -0.00000102297786657622],
PARAMETER["elt_0_2", -0.00000198773684561526],
PARAMETER["elt_0_3", 288.88648538566275],
PARAMETER["elt_1_0", 0.00000102294527471289],
PARAMETER["elt_1_1", 1.0000045979528844],
PARAMETER["elt_1_2", -0.00000819823907584184],
PARAMETER["elt_1_3", 91.74575232662902],
PARAMETER["elt_2_0", 0.00000198775361850102],
PARAMETER["elt_2_1", 0.00000819823500908657],
PARAMETER["elt_2_2", 1.0000045979499799],
PARAMETER["elt_2_3", -126.2432540925205]],
PARAM_MT["Geocentric_To_Ellipsoid",
PARAMETER["dim", 2],
PARAMETER["semi_major", 6378388.0],
PARAMETER["semi_minor", 6356911.9461279465]],
PARAM_MT["Transverse_Mercator",
PARAMETER["semi_major", 6378388.0],
PARAMETER["semi_minor", 6356911.9461279465],
PARAMETER["central_meridian", -8.131906111111114],
PARAMETER["latitude_of_origin", 39.666666666666664],
PARAMETER["scale_factor", 1.0],
PARAMETER["false_easting", 200000.0],
PARAMETER["false_northing", 300000.0]]]
--
Jody Garnett
On 7 May 2015 at 00:41, Andrea Aime <andrea.a...@geo-solutions.it> wrote:
> On Wed, May 6, 2015 at 11:43 PM, Jody Garnett <jody.garn...@gmail.com>
> wrote:
>>
>> I am quite discouraged by the regression shown with GEOS-7009
>> <https://osgeo-org.atlassian.net/browse/GEOS-7009> - in particular the
>> same WMS request produces two different GetMap results (see the issue
>> screen snaps) I am not sure what to make of that as all our rendering tests
>> pass at the GeoTools level.
>>
>
> The difference seems rather severe, even if it happened before the
> rescaling, we are talking about a shift of 3 pixels up, 1 left, that seems
> unlikely to be just a numerical glitch.
> Trying to make a guess, and assuming the obvious math is taken care of,
> how about matrix inversion? We do a lot of transformation inversion in our
> code.
>
> Cheers
> Andrea
>
>
>
>
> --
> ==
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