[QGIS-ZA-user] Georeferencing maps in QGIS

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[QGIS-ZA-user] Georeferencing maps in QGIS

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Not having done this before and relatively new to QGIS can someone please assist me with georeferencing a topo or geological map into QGIS?

Thank you in advance for the assistance.

Hanco Roux (Pr.Sci.Nat.)
Cell: 0837904575

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Re: Georeferencing maps in QGIS

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Hi Hanco,

By default the georeferencer plugin is installed with QGIS. It is sitting under your Raster menu. And it is straight forward. Add as many points with known coordinates as possible and you will have a pretty good georeferenced raster.

Open the raster image, click on an intersection or point or anything that you have coordinates for OR you can choose from the QGIS canvas with vector layers (roads, rivers, intersections, points etc.). That's it.

Regards

Immo


On 08/10/2017 14:16, Hanco Roux via qgis-za-user wrote:
Not having done this before and relatively new to QGIS can someone please assist me with georeferencing a topo or geological map into QGIS?

Thank you in advance for the assistance.

Hanco Roux (Pr.Sci.Nat.)
Cell: 0837904575

This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.


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Re: Georeferencing maps in QGIS

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Hi Hanco,

Mostly when I can't do something in QGIS I google for "QGIS something" and up it comes ;-)

On 8 October 2017 at 14:16, Hanco Roux via qgis-za-user <[hidden email]> wrote:
Not having done this before and relatively new to QGIS can someone please assist me with georeferencing a topo or geological map into QGIS?

Thank you in advance for the assistance.

Hanco Roux (Pr.Sci.Nat.)
Cell: 0837904575

This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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Chris Berens, Pr.GISc
SAGC No.1308
+27 (0)82 567 9322

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Re: Georeferencing maps in QGIS

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On 8 October 2017 at 14:43, Chris Berens <[hidden email]> wrote:
Hi Hanco,

Mostly when I can't do something in QGIS I google for "QGIS something" and up it comes ;-)

On 8 October 2017 at 14:16, Hanco Roux via qgis-za-user <[hidden email]> wrote:
Not having done this before and relatively new to QGIS can someone please assist me with georeferencing a topo or geological map into QGIS?

Thank you in advance for the assistance.

Hanco Roux (Pr.Sci.Nat.)
Cell: 0837904575

This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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Chris Berens, Pr.GISc
SAGC No.1308
<a href="tel:+27%2082%20567%209322" value="+27825679322" target="_blank">+27 (0)82 567 9322



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Chris Berens, Pr.GISc
SAGC No.1308
+27 (0)82 567 9322

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Re: Georeferencing maps in QGIS

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In reply to this post by QGIS-za-user mailing list
Hi Hanco,
One needs to be careful to make note of the projection info on topo and geological maps. Essentially these maps may have a Decimal Degree graticule around the border but the map is in fact projected. In such cases only the decimal degree values of the corners of the map are in fact accurate.

In such instances one will need to first create a pont layer of those corners in the correct projection as per the map. Only then use the georeferencing tool to georeference the scanned map to those projected corner points.
 

On Sun, Oct 8, 2017 at 2:16 PM, Hanco Roux via qgis-za-user <[hidden email]> wrote:
Not having done this before and relatively new to QGIS can someone please assist me with georeferencing a topo or geological map into QGIS?

Thank you in advance for the assistance.

Hanco Roux (Pr.Sci.Nat.)
Cell: 0837904575

This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately by e-mail if you have received this e-mail by mistake and delete this e-mail from your system. If you are not the intended recipient you are notified that disclosing, copying, distributing or taking any action in reliance on the contents of this information is strictly prohibited.

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