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Rencontres QGIS 2025

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Pages: 1

 

#1 Thu 03 November 2011 00:31

alemrabot
Participant occasionnel
Date d'inscription: 1 Feb 2010
Messages: 15

Projection UTM

bonjour,
j'ai des shapefile qui ont la projection UTM 28 nord , j"ai essayé de les mettre sur la ma carte main j'ai pas pu.
après une vérification j"ai constaté dans le MetaData il y a une difference en locale cordinates
pour le premeir j'ai In projected or local coordinates
Left: -12.000000
Right: -6.000000
Top: 27.300000
Bottom: 14.000000
pour le deuxième
In projected or local coordinates
Left: -12.000000
Right: -6.000000
Top: 27.300000
Bottom: 14.000000

comment je peux mettre le premier en mètre

merci

Dernière modification par alemrabot (Thu 03 November 2011 00:31)

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#2 Thu 03 November 2011 10:35

alemrabot
Participant occasionnel
Date d'inscription: 1 Feb 2010
Messages: 15

Re: Projection UTM

voici les details du metadata>>spatial

Code:

Horizontal coordinate system
Projected coordinate system name: WGS_1984_UTM_Zone_28N
Geographic coordinate system name: GCS_WGS_1984
Details 
Grid Coordinate System Name: Universal Transverse Mercator
UTM Zone Number: 28
Transverse Mercator Projection
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: -15.000000
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000



Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000


Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________


Bounding coordinates
Horizontal
In decimal degrees
West: -19.488898
East: -19.488851
North: 0.000212
South: 0.000126
In projected or local coordinates
Left: -17.150000
Right: -12.000000
Top: 23.500000
Bottom: 14.000000
_________________


Spatial data description
Vector data information
ESRI description
FUS28_region 
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 28
Spatial Index: FALSE
Linear referencing: FALSE



SDTS description 
Feature class: SDTS feature type, feature count
FUS28_region: G-polygon, 28 




Details for FUS28_region
Type of object: Feature Class
Number of records: 28
Attributes
FID 
Alias: FID
Data type: OID
Width: 4
Precision: 0
Scale: 0
Definition: 
Internal feature number.
Definition Source: 
ESRI


Shape 
Alias: Shape
Data type: Geometry
Width: 0
Precision: 0
Scale: 0
Definition: 
Feature geometry.
Definition Source: 
ESRI


NUMCOUPURE 
Alias: NUMCOUPURE
Data type: Number
Width: 10


NOMCOUPURE 
Alias: NOMCOUPURE
Data type: String
Width: 50


NRéFéRENCE 
Alias: NRéFéRENCE
Data type: Number
Width: 20


NUMFEUILLE 
Alias: NUMFEUILLE
Data type: String
Width: 31


UTM_ZONE 
Alias: UTM_ZONE
Data type: Number
Width: 5


AREA 
Alias: AREA
Data type: Number
Width: 20
Number of decimals: 3


PERIMETER 
Alias: PERIMETER
Data type: Number
Width: 20
Number of decimals: 3


X_COORD 
Alias: X_COORD
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD 
Alias: Y_COORD
Data type: Number
Width: 31
Number of decimals: 15


X_COORD0 
Alias: X_COORD0
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD0 
Alias: Y_COORD0
Data type: Number
Width: 31
Number of decimals: 15


X_COORD1 
Alias: X_COORD1
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD1 
Alias: Y_COORD1
Data type: Number
Width: 31
Number of decimals: 15


X_COORD2 
Alias: X_COORD2
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD2 
Alias: Y_COORD2
Data type: Number
Width: 31
Number of decimals: 15


CHAMP1 
Alias: CHAMP1
Data type: Boolean
Width: 1

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#3 Thu 03 November 2011 15:32

Christophe Révillion
Participant actif
Lieu: Saint Pierre (Réunion)
Date d'inscription: 3 Aug 2011
Messages: 123

Re: Projection UTM

bonjour,

Logiquement, comme ta couche est projetée, tu peux avoir les distances selon l'unité que tu désires (et donc en mètre).

Ce que je ne comprend pas bien c'est pourquoi tu n'arrives pas à afficher tes couches (quel est le message d'erreur?).

Donne-nous de plus d'infos.

Cordialement

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#4 Thu 03 November 2011 16:23

alemrabot
Participant occasionnel
Date d'inscription: 1 Feb 2010
Messages: 15

Re: Projection UTM

Il m'affiche pas un message d'errure.
mais je vois pas les deuxcouches sur la memeplace alors qu'ils doivent se superposer.
voici les meta data de chaque couche , vous pouvez constatez la difference

Code:

Horizontal coordinate system
Projected coordinate system name: WGS_1984_UTM_Zone_28N
Geographic coordinate system name: GCS_WGS_1984
Details 
Grid Coordinate System Name: Universal Transverse Mercator
UTM Zone Number: 28
Transverse Mercator Projection
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: -15.000000
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000



Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000


Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________


Bounding coordinates
Horizontal
In decimal degrees
West: -19.488898
East: -19.488851
North: 0.000212
South: 0.000126
In projected or local coordinates
Left: -17.150000
Right: -12.000000
Top: 23.500000
Bottom: 14.000000
_________________


Spatial data description
Vector data information
ESRI description
FUS28_region 
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 28
Spatial Index: FALSE
Linear referencing: FALSE



SDTS description 
Feature class: SDTS feature type, feature count
FUS28_region: G-polygon, 28 




Details for FUS28_region
Type of object: Feature Class
Number of records: 28
Attributes
FID 
Alias: FID
Data type: OID
Width: 4
Precision: 0
Scale: 0
Definition: 
Internal feature number.
Definition Source: 
ESRI


Shape 
Alias: Shape
Data type: Geometry
Width: 0
Precision: 0
Scale: 0
Definition: 
Feature geometry.
Definition Source: 
ESRI


NUMCOUPURE 
Alias: NUMCOUPURE
Data type: Number
Width: 10


NOMCOUPURE 
Alias: NOMCOUPURE
Data type: String
Width: 50


NRéFéRENCE 
Alias: NRéFéRENCE
Data type: Number
Width: 20


NUMFEUILLE 
Alias: NUMFEUILLE
Data type: String
Width: 31


UTM_ZONE 
Alias: UTM_ZONE
Data type: Number
Width: 5


AREA 
Alias: AREA
Data type: Number
Width: 20
Number of decimals: 3


PERIMETER 
Alias: PERIMETER
Data type: Number
Width: 20
Number of decimals: 3


X_COORD 
Alias: X_COORD
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD 
Alias: Y_COORD
Data type: Number
Width: 31
Number of decimals: 15


X_COORD0 
Alias: X_COORD0
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD0 
Alias: Y_COORD0
Data type: Number
Width: 31
Number of decimals: 15


X_COORD1 
Alias: X_COORD1
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD1 
Alias: Y_COORD1
Data type: Number
Width: 31
Number of decimals: 15


X_COORD2 
Alias: X_COORD2
Data type: Number
Width: 31
Number of decimals: 15


Y_COORD2 
Alias: Y_COORD2
Data type: Number
Width: 31
Number of decimals: 15


CHAMP1 
Alias: CHAMP1
Data type: Boolean
Width: 1

couche 2

Code:

Horizontal coordinate system
Projected coordinate system name: WGS_1984_UTM_Zone_28N
Geographic coordinate system name: GCS_WGS_1984
Details 
Grid Coordinate System Name: Universal Transverse Mercator
UTM Zone Number: 28
Transverse Mercator Projection
Scale Factor at Central Meridian: 0.999600
Longitude of Central Meridian: -15.000000
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000



Planar Coordinate Information
Planar Distance Units: meters
Coordinate Encoding Method: coordinate pair
Coordinate Representation
Abscissa Resolution: 0.000000
Ordinate Resolution: 0.000000


Geodetic Model
Horizontal Datum Name: D_WGS_1984
Ellipsoid Name: WGS_1984
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257224
_________________


Bounding coordinates
Horizontal
In decimal degrees
West: -17.509460
East: -16.315473
North: 18.490791
South: 17.033969
In projected or local coordinates
Left: 235000.000002
Right: 360000.000002
Top: 2045000.000002
Bottom: 1885000.000002
_________________


Spatial data description
Vector data information
ESRI description
Zone3_UTM28N_Tullow_Final_Polygon 
ESRI feature type: Simple
Geometry type: Polygon
Topology: FALSE
Feature count: 1
Spatial Index: FALSE
Linear referencing: FALSE



SDTS description 
Feature class: SDTS feature type, feature count
Zone3_UTM28N_Tullow_Final_Polygon: G-polygon, 1 




Details for Zone3_UTM28N_Tullow_Final_Polygon
Type of object: Feature Class
Number of records: 1
Attributes
FID 
Alias: FID
Data type: OID
Width: 4
Precision: 0
Scale: 0
Definition: 
Internal feature number.
Definition Source: 
ESRI


Shape 
Alias: Shape
Data type: Geometry
Width: 0
Precision: 0
Scale: 0
Definition: 
Feature geometry.
Definition Source: 
ESRI


Id 
Alias: Id
Data type: Number
Width: 16
Number of decimals: 6


ET_ID 
Alias: ET_ID
Data type: String
Width: 100

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#5 Thu 03 November 2011 16:38

Christophe Révillion
Participant actif
Lieu: Saint Pierre (Réunion)
Date d'inscription: 3 Aug 2011
Messages: 123

Re: Projection UTM

Il semble effectivement que la première couche n'est en fait pas projetée. Il faudrait donc le faire grâce à l'outil "projeter" de la toolbox.

Est-ce que cela corrige ton problème?

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#6 Fri 04 November 2011 13:01

alemrabot
Participant occasionnel
Date d'inscription: 1 Feb 2010
Messages: 15

Re: Projection UTM

Bonjour,
j'ai changé la projection en utilisant ToolBox , mais c'est toujours la même chose.

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#7 Tue 08 November 2011 00:36

alemrabot
Participant occasionnel
Date d'inscription: 1 Feb 2010
Messages: 15

Re: Projection UTM

Personne n' a une solution

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#8 Fri 11 November 2011 18:01

mame1985
Participant assidu
Lieu: Montréal
Date d'inscription: 16 Oct 2010
Messages: 444

Re: Projection UTM

Bonjour
mes recherches m'indiquent que ta zone d'etude se situe au senegal, pas vrai?
Il faut d'abord que tu lui definisses une projection sous arc catalog et ensuite tu le projectes
ça devrait marcher normalement.
merci

Mame

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