crs

classic Classic list List threaded Threaded
5 messages Options
Reply | Threaded
Open this post in threaded view
|

crs

Boaz Bar Ilan
hi

I have a dxf file ( converted from dwg ) . its coodinates are in the old grid.

how can I match it to the new grid ?

whaen I change it in the project property it doesn't work

thanks

boaz

_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Reply | Threaded
Open this post in threaded view
|

Re: crs

Richard McDonnell
Hi Boaz,
First thing I would say is to save it as a shapefile in its native CRS. Also you dont mention a EPSG Code, are you using a defined or custom CRS?
If you are using a defined CRS with a EPSG, you can use on the fly transformations, having the project set to the "New Grid" and your shapefile in its native or "Old grid". This can be done by right clicking on the EPSG: code on the bottom right of QGIS, and ticking Enable 'on the fly' transformations
The other option would be to use reproject shapefile, to translate the  CRS from the old to the new. you can find this by typing reproject into the Processing Toolbox Search, its one of the QGIS geoalgorithims.
Regards,

Richard.


On 10/02/2017 12:27, Boaz Bar Ilan wrote:
hi

I have a dxf file ( converted from dwg ) . its coodinates are in the old grid.

how can I match it to the new grid ?

whaen I change it in the project property it doesn't work

thanks

boaz


_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user

--
Richard McDonnell
GIS Specialist PgD GIS AssocSCSI
OPW FRM Data Management
52 Stephens Green, Dublin 2.
TEL: 01 6476543


_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Reply | Threaded
Open this post in threaded view
|

Re: crs

Nicolas Cadieux
In reply to this post by Boaz Bar Ilan
Hi,

I see that Richard has responded correctly.  I will just add that dxf files do not really have a CRS.  You just need to know it!  Usually, the coordinates are in meters or feet and correspond to a local CRS (ex UTM zone 18N).  You may have to do some trial and error in order to find the original CRS.  When you find that, saving it as a shape file as Richard mentioned, and then specifying the crs, is a good way to go.

Good luck
Nicolas

Le 10 févr. 2017 à 07:27, Boaz Bar Ilan [via OSGeo.org] <[hidden email]> a écrit :

hi

I have a dxf file ( converted from dwg ) . its coodinates are in the old grid.

how can I match it to the new grid ?

whaen I change it in the project property it doesn't work

thanks

boaz

_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user


If you reply to this email, your message will be added to the discussion below:
http://osgeo-org.1560.x6.nabble.com/crs-tp5307405.html
To start a new topic under QGIS - User, email [hidden email]
To unsubscribe from QGIS - User, click here.
NAML
Reply | Threaded
Open this post in threaded view
|

Re: crs

Richard McDonnell
In reply to this post by Richard McDonnell
Hey,
By defined, im looking to see are you using a recognised Coordinate reference System (CRS).
For Example you mention Israeli TM, which has a EPSG code of 2093, does your old Grid have a recognised CRS 4141 perhaps???
Without knowing what CRS of your DXF has its very hard to do either of my examples.
Sorry I cant be of more help!
Regards,

Richard.

On 10/02/2017 14:37, Boaz Bar Ilan wrote:
hi

thanks
I don't know what your mean  - defined csr code - I switch to Israel / Israeli TM
and I  also   enable on to fly option. so I couldn't understand your first advice

I tried your second advice ( by typing reproject). when I do run  I get  :

Algorithm Reproject layer starting...


unknown See log for more details


thanks


boaz


2017-02-10 15:36 GMT+02:00 Richard McDonnell <[hidden email]>:
Hi Boaz,
First thing I would say is to save it as a shapefile in its native CRS. Also you dont mention a EPSG Code, are you using a defined or custom CRS?
If you are using a defined CRS with a EPSG, you can use on the fly transformations, having the project set to the "New Grid" and your shapefile in its native or "Old grid". This can be done by right clicking on the EPSG: code on the bottom right of QGIS, and ticking Enable 'on the fly' transformations
The other option would be to use reproject shapefile, to translate the  CRS from the old to the new. you can find this by typing reproject into the Processing Toolbox Search, its one of the QGIS geoalgorithims.
Regards,

Richard.



On 10/02/2017 12:27, Boaz Bar Ilan wrote:
hi

I have a dxf file ( converted from dwg ) . its coodinates are in the old grid.

how can I match it to the new grid ?

whaen I change it in the project property it doesn't work

thanks

boaz


_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
-- Richard McDonnell GIS Specialist PgD GIS AssocSCSI OPW FRM Data Management 52 Stephens Green, Dublin 2. TEL: 01 6476543
-- Richard McDonnell GIS Specialist PgD GIS AssocSCSI OPW FRM Data Management 52 Stephens Green, Dublin 2. TEL: 01 6476543


_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
Reply | Threaded
Open this post in threaded view
|

Re: crs

Richard McDonnell
Boaz,
Assuming that's the correct CRS,
  1. Save the DXF as a Shapefile and specify 4326.
  2. Using Reproject Layer, select the newly created shapefile and specify the 2039 ( I had it wrong in my previous email) in the Target CRS field, by right clicking on the button to the right of the field and typing 2039 into the search field, and select Israeli TM
  3. Under the Reprojected field either leave alone (results in a tempory File) or pick save to file by right clicking on the little button to the right of the field

The translated file should be loaded into your desktop.
Hope this helps,

Richard.


On 10/02/2017 15:24, Boaz Bar Ilan wrote:
the dxf comes ( when I  add it) with  crs  epsg 4326

I'm trying to change it to EPSG code of 2093

am I now more clear ? I hope so

thanks

boaz

2017-02-10 17:17 GMT+02:00 Richard McDonnell <[hidden email]>:
Hey,
By defined, im looking to see are you using a recognised Coordinate reference System (CRS).
For Example you mention Israeli TM, which has a EPSG code of 2093, does your old Grid have a recognised CRS 4141 perhaps???
Without knowing what CRS of your DXF has its very hard to do either of my examples.
Sorry I cant be of more help!
Regards,

Richard.


On 10/02/2017 14:37, Boaz Bar Ilan wrote:
hi

thanks
I don't know what your mean  - defined csr code - I switch to Israel / Israeli TM
and I  also   enable on to fly option. so I couldn't understand your first advice

I tried your second advice ( by typing reproject). when I do run  I get  :

Algorithm Reproject layer starting...


unknown See log for more details


thanks


boaz


2017-02-10 15:36 GMT+02:00 Richard McDonnell <[hidden email]>:
Hi Boaz,
First thing I would say is to save it as a shapefile in its native CRS. Also you dont mention a EPSG Code, are you using a defined or custom CRS?
If you are using a defined CRS with a EPSG, you can use on the fly transformations, having the project set to the "New Grid" and your shapefile in its native or "Old grid". This can be done by right clicking on the EPSG: code on the bottom right of QGIS, and ticking Enable 'on the fly' transformations
The other option would be to use reproject shapefile, to translate the  CRS from the old to the new. you can find this by typing reproject into the Processing Toolbox Search, its one of the QGIS geoalgorithims.
Regards,

Richard.



On 10/02/2017 12:27, Boaz Bar Ilan wrote:
hi

I have a dxf file ( converted from dwg ) . its coodinates are in the old grid.

how can I match it to the new grid ?

whaen I change it in the project property it doesn't work

thanks

boaz


_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
-- Richard McDonnell GIS Specialist PgD GIS AssocSCSI OPW FRM Data Management 52 Stephens Green, Dublin 2. TEL: 01 6476543
-- Richard McDonnell GIS Specialist PgD GIS AssocSCSI OPW FRM Data Management 52 Stephens Green, Dublin 2. TEL: 01 6476543
-- Richard McDonnell GIS Specialist PgD GIS AssocSCSI OPW FRM Data Management 52 Stephens Green, Dublin 2. TEL: 01 6476543


_______________________________________________
Qgis-user mailing list
[hidden email]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user