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Project website postgis.net
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Source code repository https://git.osgeo.org/gitea/postgis/postgis.git
Repository branch stable-3.2
Last remote commit Push to 3.2.6dev milestone 6e2c5206d
Regina Obe authored a week ago
Weblate repository https://weblate.osgeo.org/git/postgis_branch_32/postgis/
File mask doc/po/*/reference_srs.xml.po
Translation file Download doc/po/fr/reference_srs.xml.po
Last change None
Last author None

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Total 54 978 8,949
Translated 0% 0 0% 0 0% 0
Needs editing 0% 0 0% 0 0% 0
Read-only 0% 0 0% 0 0% 0
Failing checks 5% 3 1% 12 1% 95
Strings with suggestions 92% 50 92% 908 86% 7,725
Untranslated strings 100% 54 100% 978 100% 8,949
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User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

UPDATE spatial_ref_sys SET proj4text = '+proj=longlat +ellps=clrk66 +nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat,null +no_defs' WHERE srid = 4267;
UPDATE spatial_ref_sys SET proj4text = '+proj=longlat +ellps=clrk66 +nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat,null +no_defs' WHERE srid = 4267 ;
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

The null grid shift file is a valid grid shift file covering the whole world and applying no shift. So for a complete example, if you wanted to alter PostGIS so that transformations to SRID 4267 that didn't lie within the correct range did not throw an ERROR, you would use the following:
Le fichier de décalage de grille nul est un fichier de décalage de grille valide couvrant le monde entier et n'appliquant aucun décalage. Ainsi, pour un exemple complet, si vous vouliez modifier PostGIS de manière à ce que les transformations du SRID 4267 qui ne se situent pas dans la plage correcte n'entraînent pas d'ERREUR, vous utiliseriez ce qui suit :
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

+nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat,null
+nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat,null
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

If, conversely, you wanted to ensure that at least the standard files were present, but that if all files were scanned without a hit a null transformation is applied you could use:
Si, à l'inverse, vous voulez vous assurer qu'au moins les fichiers standard sont présents, mais que si tous les fichiers ont été analysés sans résultat, une transformation nulle est appliquée, vous pouvez utiliser :
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

The @ prefix means no error is reported if the files are not present, but if the end of the list is reached with no file having been appropriate (ie. found and overlapping) then an error is issued.
Le préfixe @ signifie qu'aucune erreur n'est signalée si les fichiers ne sont pas présents, mais si la fin de la liste est atteinte sans qu'aucun fichier n'ait été approprié (c'est-à-dire trouvé et se chevauchant), une erreur est émise.
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

+nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat
+nadgrids=@conus,@alaska,@ntv2_0.gsb,@ntv1_can.dat
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

For example, the proj4text parameter +datum=NAD87 is a shorthand form for the following +nadgrids parameter:
Par exemple, le paramètre proj4text +datum=NAD87 est une forme abrégée du paramètre +nadgrids suivant :
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

Sometimes coordinate transformation involving a grid-shift can fail, for example if PROJ.4 has not been built with grid-shift files or the coordinate does not lie within the range for which the grid shift is defined. By default, PostGIS will throw an error if a grid shift file is not present, but this behavior can be configured on a per-SRID basis either by testing different <varname>to_proj</varname> values of PROJ.4 text, or altering the <varname>proj4text</varname> value within the <varname>spatial_ref_sys</varname> table.
Parfois, la transformation de coordonnées impliquant un décalage de grille peut échouer, par exemple si PROJ.4 n'a pas été construit avec des fichiers de décalage de grille ou si la coordonnée ne se trouve pas dans la plage pour laquelle le décalage de grille est défini. Par défaut, PostGIS génère une erreur si un fichier de décalage de grille n'est pas présent, mais ce comportement peut être configuré pour chaque SRID, soit en testant différentes valeurs <varname>to_proj</varname> de texte PROJ.4, soit en modifiant la valeur <varname>proj4text</varname> dans la table <varname>spatial_ref_sys</varname>.
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

Configuring transformation behavior
Configurer le comportement de transformation
11 days ago
User avatar anonymous

Suggestion added

postgis_branch_32 / reference_srs — French

-- Find intersection of two polygons near the North pole, using a custom Gnomic projection
-- See http://boundlessgeo.com/2012/02/flattening-the-peel/
WITH data AS (
SELECT
ST_GeomFromText('POLYGON((170 50,170 72,-130 72,-130 50,170 50))', 4326) AS p1,
ST_GeomFromText('POLYGON((-170 68,-170 90,-141 90,-141 68,-170 68))', 4326) AS p2,
'+proj=gnom +ellps=WGS84 +lat_0=70 +lon_0=-160 +no_defs'::text AS gnom
)
SELECT ST_AsText(
ST_Transform(
ST_Intersection(ST_Transform(p1, gnom), ST_Transform(p2, gnom)),
gnom, 4326))
FROM data;
st_astext
--------------------------------------------------------------------------------
POLYGON((-170 74.053793645338,-141 73.4268621378904,-141 68,-170 68,-170 74.053793645338))
-- Trouver l'intersection de deux polygones près du pôle Nord, en utilisant une projection Gnomic personnalisée
-- Voir http://boundlessgeo.com/2012/02/flattening-the-peel/
WITH data AS (
SELECT
ST_GeomFromText('POLYGON((170 50,170 72,-130 72,-130 50,170 50))', 4326) AS p1,
ST_GeomFromText('POLYGON((-170 68,-170 90,-141 90,-141 68,-170 68))', 4326) AS p2,
'+proj=gnom +ellps=WGS84 +lat_0=70 +lon_0=-160 +no_defs'::text AS gnom
)
SELECT ST_AsText(
ST_Transform(
ST_Intersection(ST_Transform(p1, gnom), ST_Transform(p2, gnom)),
gnom, 4326))
FROM données ;
st_astext
--------------------------------------------------------------------------------
POLYGON((-170 74.053793645338,-141 73.4268621378904,-141 68,-170 68,-170 74.053793645338))
11 days ago
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