For those who cannot find the georeferencer GDAL tool in the plugins, do not despair. Since version 3.26 it has moved to the Layer menu because it now supports both raster and vector data.
Congrats Mate! A great and simple explanation, going through step by step in a good pace, that makes your tutorial very friendly to non-native speackers. Awesome!
Thank you for sharing, this was a great explanation! How do you inverse the georeferencing process? Distort the modern map to match the undistorted antique map.
Interesting question! One approach would be to import the antique map to the map canvas as a raster (without a coordinate system) and georeference a raster representation modern map projection to the antique map. However I think this task is more suited to the general case of image registration, using something like MATLAB, NiftyReg, OpenCV or scikit-image in Python.
@@CapeRADD Thank you for your reply, I will give it a shot. Was hoping I could somehow use the .points data that was created when georeferencing the antique map. Was looking in to QGIS - GDAL - Warp, I believe it allows you to write a script in Python and reproject. Unfortunately is outside of my skillsets.
Great video. I have tried this but when I run the transformation it indicates that it did so successfully but the image does not show up in my QGIS workspace. Any ideas?
Thanks for the comment! I do this all the time. There's an option to add the georeferenced image to your map canvas that is easy to overlook. Look for "Load in QGIS when done." at the bottom of the transformation settings. You can also manually add the image to your canvas as a raster using the Data Source Manager. If the georeferencing was successful, you should be able to find it where it was saved.
@@CapeRADD Thanks. I did have that checked but it was not showing up. I figured it out though. I had to go back to the new raster layer and set the CRS for it.
question: at 0815 you mentioned the challenge of what reference system is this map assigned. Are you referring to coordinate reference systems? I always get confused, for example WGS84 with UTM XYZ. Great video and thank you!
Exactly! Most GPS data will use the WGS84 coordinate system, but in South Africa for instance, surveying and engineering data might use the Hart94 reference system. These are geographic coordinate systems (they exist on a sphere). UTM zones are a projected reference system (they exist on a plane) and can be useful as the unit of measure is the meter, rather than degrees latitude or longitude, so measurements like length and area are more meaningful!
Great video and thanks for making it, I would recommend turn off the author's video while explaining the steps, it's major distraction to view and watching the face same time (similar to Zoom meeting effect). thanks
It is no longer necessary to activate it as a plugin. The Georeferencer is now included as part of QGIS core. Simply look for the menu item under the Raster menu.
hello! thanks for your explanation.. I have a question. May I change the position manually after placing it. I couldn't get it exactly on top of each other. Thank you!
Hi Louai, There isn't a straight-forward way to drag the georeferenced image around that I'm aware of, but you can adjust your control points and perform the geo-referencing again to try and place it more accurately.
how do you get an aerial photo from say Bing maps using a print screen and save in a format that will be accepted by QGIS? I have a print screen image saved in Libre office but when I try to import it to the geo referencer it says aerial photo from Bing.doc is not a supported raster data source.
You would have to save that screenshot as an image using some kind of image editor like Gimp or MS Paint. However, QGIS 2.18 and above allow connections to a Tile Server like Bing or Google Maps. This stackexchange answer nicely documents how. gis.stackexchange.com/questions/20191/adding-basemaps-from-google-or-bing-in-qgis/217670#217670
@@CapeRADD thank you I have finally managed to achieve something! So I have added in all the google satellite and google topo maps as layers now, so I presume these are all georeferenced ? Also my coordinate system in the bottom right is EPSG 32629. I am in Ireland and want to use the Irish Trans Mercator system... I could not find it in QGIS, so could you point me in the right direction. One more question... in Ireland we have old 6" maps from the 1800's which are really handy for looking at old field boundaries etc. Would you know where I would go to get the Urls for these? Thank you your video was great.
@@melindaswann2018 If you added the images from the XYZ Tiles browser entry, then they are automatically georeferenced. EPSG 32629 is a UTM (Universal Transverse Mercator) projection valid between 12W and 6W in the northern hemisphere, which includes Ireland. It might actually be what you had in mind? As far as the historic maps, I'm not sure. You'll have to find someone who has digitised them. Maybe a local University library?
Depending on where you got the LANDSAT image, it should already be georeferenced! It's been a while since I've used any LANDSAT stuff, but I'm sure EarthExplorer was providing GeoTIFF files
For those who cannot find the georeferencer GDAL tool in the plugins, do not despair. Since version 3.26 it has moved to the Layer menu because it now supports both raster and vector data.
THANK YOU!
Thanks!
Fantastic video, I was struggling several to do this, you saved me
great video. loved it. made Georeferencing easy. thanks
Great, it was good to have refresh
Congrats Mate! A great and simple explanation, going through step by step in a good pace, that makes your tutorial very friendly to non-native speackers. Awesome!
Very nice vide. Thanks, For info, Geo Refrencer is in new version > Look under > Layers menu.
Thanks @pubudunipun, I've actually been meaning to add a comment about that!
was a good one Thankyou!
Super handy tut, thanks!
Really helpful.
Thank you for sharing, this was a great explanation!
How do you inverse the georeferencing process? Distort the modern map to match the undistorted antique map.
Interesting question! One approach would be to import the antique map to the map canvas as a raster (without a coordinate system) and georeference a raster representation modern map projection to the antique map. However I think this task is more suited to the general case of image registration, using something like MATLAB, NiftyReg, OpenCV or scikit-image in Python.
@@CapeRADD Thank you for your reply, I will give it a shot.
Was hoping I could somehow use the .points data that was created when georeferencing the antique map. Was looking in to QGIS - GDAL - Warp, I believe it allows you to write a script in Python and reproject. Unfortunately is outside of my skillsets.
Great video. I have tried this but when I run the transformation it indicates that it did so successfully but the image does not show up in my QGIS workspace. Any ideas?
Thanks for the comment! I do this all the time. There's an option to add the georeferenced image to your map canvas that is easy to overlook. Look for "Load in QGIS when done." at the bottom of the transformation settings. You can also manually add the image to your canvas as a raster using the Data Source Manager. If the georeferencing was successful, you should be able to find it where it was saved.
@@CapeRADD Thanks. I did have that checked but it was not showing up. I figured it out though. I had to go back to the new raster layer and set the CRS for it.
question: at 0815 you mentioned the challenge of what reference system is this map assigned. Are you referring to coordinate reference systems? I always get confused, for example WGS84 with UTM XYZ. Great video and thank you!
Exactly! Most GPS data will use the WGS84 coordinate system, but in South Africa for instance, surveying and engineering data might use the Hart94 reference system. These are geographic coordinate systems (they exist on a sphere). UTM zones are a projected reference system (they exist on a plane) and can be useful as the unit of measure is the meter, rather than degrees latitude or longitude, so measurements like length and area are more meaningful!
Thank you SO MUCH!!!
Thank you!
Great video and thanks for making it, I would recommend turn off the author's video while explaining the steps, it's major distraction to view and watching the face same time (similar to Zoom meeting effect). thanks
Georeferencing GDAL is not visible on my QGIS
The tool can be found under the Layers menu in more recent versions of QGIS
I didn't find that plugin in the repository of QGIS... Help!
It is no longer necessary to activate it as a plugin. The Georeferencer is now included as part of QGIS core. Simply look for the menu item under the Raster menu.
hello! thanks for your explanation.. I have a question.
May I change the position manually after placing it. I couldn't get it exactly on top of each other.
Thank you!
Hi Louai, There isn't a straight-forward way to drag the georeferenced image around that I'm aware of, but you can adjust your control points and perform the geo-referencing again to try and place it more accurately.
how do you get an aerial photo from say Bing maps using a print screen and save in a format that will be accepted by QGIS? I have a print screen image saved in Libre office but when I try to import it to the geo referencer it says aerial photo from Bing.doc is not a supported raster data source.
You would have to save that screenshot as an image using some kind of image editor like Gimp or MS Paint. However, QGIS 2.18 and above allow connections to a Tile Server like Bing or Google Maps. This stackexchange answer nicely documents how. gis.stackexchange.com/questions/20191/adding-basemaps-from-google-or-bing-in-qgis/217670#217670
@@CapeRADD thank you I have finally managed to achieve something! So I have added in all the google satellite and google topo maps as layers now, so I presume these are all georeferenced ? Also my coordinate system in the bottom right is EPSG 32629. I am in Ireland and want to use the Irish Trans Mercator system... I could not find it in QGIS, so could you point me in the right direction. One more question... in Ireland we have old 6" maps from the 1800's which are really handy for looking at old field boundaries etc. Would you know where I would go to get the Urls for these? Thank you your video was great.
@@melindaswann2018 If you added the images from the XYZ Tiles browser entry, then they are automatically georeferenced. EPSG 32629 is a UTM (Universal Transverse Mercator) projection valid between 12W and 6W in the northern hemisphere, which includes Ireland. It might actually be what you had in mind? As far as the historic maps, I'm not sure. You'll have to find someone who has digitised them. Maybe a local University library?
@@melindaswann2018 Looked into it a little further. 32629 isn't the ITM. The EPSG code for ITM is EPSG 2157
convert it into a pdf first
how to georefence landsat images using qgis
Depending on where you got the LANDSAT image, it should already be georeferenced! It's been a while since I've used any LANDSAT stuff, but I'm sure EarthExplorer was providing GeoTIFF files
you should have prepared a bit more before creating this video. Its much easier if you find a map whos coordinate system is established.
Thank you, but the purpose of this video was to show how you would georeference an image that does not have an embedded coordinate system.