30

The following are quoted from the QGIS docs regarding the Available Transformation algorithms: The Linear algorithm is used to create a world file and is different from the other algorithms, as it does not actually transform the raster. This algorithm likely won’t be sufficient if you are dealing with scanned material. The Helmert transformation performs ...


21

The Fundamentals of georeferencing a raster dataset page from Esri explains the fundamentals of georeferencing. In short, the number of points depends. It depends on if you are simply moving the data, scaling, rotating or some combination of all three. If I am going to shift data that is already correctly scaled and rotated, then I would simply click one ...


15

I stumbled upon your question while trying to do the same thing, here's how I did it: Software used: Inkscape QGIS 2.2 Affine Transformation plugin for QGIS Extracting vector data from PDF It's what you have already done, basically just open the PDF in Inkscape, find the shapes you want and remove all backgrounds and surrounding text. Save as .dxf file. ...


15

In your case (jpg rasters and exact same extent for all rasters) the Warp From File tool is just fine. If you haven't saved a link file yet you should do this first: Georeference one raster in ArcMap, click the View Link Table button and save the links to a text file using the Save button: Then there are different options: Batch: You can use the Warp ...


14

I had the same problem. This should solve the bug (QGIS 2.6 under Windows): close QGIS using regedit.exe, search for "Plugin-GeoReferencer". This should point to a folder under \HKEY_CURRENT_USER\Software\QGIS\QGIS2\Plugins (optional: export a .reg version of the folder for back-up) delete the folder "Plugin-Georeferencer" restart QGIS. Georeferencer window ...


14

Linear transformation only set the offset and scale (no rotation), minimum two points required (raster is not resampled as the original pixels are preserved) Helmert transformation is sometimes called orthogonal transformation as it preserves angles (4 parameters: offset x and y, rotation and scale), minimum two points required. Polynomial 1 transformation ...


13

I had the same problem. This should solve the bug (QGIS 2.6 under Windows): close QGIS using regedit.exe, search for "Plugin-GeoReferencer". This should point to a folder under \HKEY_CURRENT_USER\Software\QGIS\QGIS2\Plugins (optional: export a .reg version of the fodler for back-up) delete the folder "Plugin-Georeferencer" restart QGIS. Georeferencer ...


12

Another - more interactive - option is the Vector Bender plugin. It does to vectors what georefencers does to raster. This feature is also known as "rubber sheeting". There is even a video showcasing how it works: https://vimeo.com/96142479


12

The Map has mostly remarks in French, so I would suggest to use a French coordinate system, and not Everest (who was British). The French used coordinate systems with a prime meridian based at Paris, so EPSG:4821 Voirol 1879 (Paris) is a good start-off. With that, the 100° meridian is hitting the Malaysian coast near Kota Baru, as in your map: You can use ...


11

I recommend the Vector Bender plugin for QGIS. I tried it and it works fine and is user friendly. Depending on amount of pair of points that you define, you can either do: translations: translation from one starting to ending point (1 pair) uniform: translation, scaling and rotation (2 pairs) bending: additional deformation (3 pairs or more) You find a ...


11

Complimentary use of Bing maps is currently being phased out by Esri, and after December 31st, you'll no longer be able to use it at all. Right now, I think the only way you can use Bing as your basemap is if you have it in a map document that was saved before the cut-off date. See the blog post, Bing Maps Use in ArcMap Has Changed. There are still free ...


11

There are multiple Issues at hand, and I think we should handle them one by one. I feel that you are trying to ask How to georefrence a map so as to have the least RMS error? If this is so, I would suggest that you edit your question, and change the title accordingly. To understand how to reduce the RMS error, you need to understand what RMS Error ...


11

You're setting the target resolution to 1 which is 1 meter per pixel. This is definitely low resolution compared to the original plan. Leave that option out and the output should be fine.


11

I had the same issue. The bug is in the box. Place the box next to Georeferencer plugin and activate it:


10

A new PDF to TIFF tool has been added to ArcGIS 10.3 for Desktop: Exports an existing PDF file to a Tagged Image File Format (TIFF). If the PDF has georeference information, the TIFF can be a GeoTIFF. These TIFFs can be used as a source for heads-up digitizing and viewing in ArcMap. Both GeoPDF and ISO standards of georeferenced PDFs are supported....


10

There are two programs using the libgeotiff library that will let you export and import georeferencing info from GeoTIFFs (and other image file formats): listgeo for saving the georeferencing info into a file, and geotifcp for writing the info from that file back to the image file after it's been edited. Downloads for the libgeotiff library can be found here:...


10

Instead of trying to zoom to layer you need to use the georeferencing toolbar to display your .jpg Once you have the .jpg in your table of contents, navigate to where your image will be georeferenced (assuming you have a basemap) you can then open the drop-down and select fit to display: This will center the image on your screen allowing you to start the ...


10

It looks like the map is aligned to lat-long and the grid system is skew to that slightly. The map corners have lat-long markers and seem to confirm this. So in the QGIS georeferences, tag the four corners and give them the coordinates in the corners - you should get this: The map is from 100 to 101 degrees E and 20.67 to 21.33 N. Once those points are set, ...


10

The workflow that you can follow to get the desired output is as follows:- Georeference the Map Georefrencing in QGIS Once the map is georeferenced, create new shapefiles(Points, Lines, and Polygons) Digitize the features that you might want to get from the map Kindly follow the lessons below for a better understanding. Lesson: Georeferencing a Map Lesson: ...


9

Several of the answers provided here are no longer options for QGIS 3, and/or only allow for linear transformations of the vector file being georeferenced. This may answer the OP's question, but others who look at this post may want other transformation options for georeferencing vector files. Issues with some of the solutions for georeferencing vector ...


9

Turn off snapping (Snapping toolbar, uncheck "Use Snapping"). I've had this problem before when there are many vector layers in a project, the cursor is getting bogged down looking for a vertex (or edge, or whatever) to snap to. You could also try copying the image to be georeferenced to a new, empty ArcGIS project along with the bare minimum of vector ...


9

The following is basically quoted from the book: "Mastering QGIS" by Kurt Menke, Luigi Pirelli, Richard Smith Jr & John Van Hoesen on page 199: mapX and mapY are the Destination Coordinates. pixelX and pixelY are the Source Coordinates. enable has a boolean value where 1 means it will be used in the transformation; 0 means it will not be used.


9

I've done this before with success using the Photosynth Toolkit (http://www.visual-experiments.com/demos/photosynthtoolkit/), except instead of a drone I was hanging my head out of a small plane taking pictures of the downtown area of a small town. You could also check out Visual SFM (http://ccwu.me/vsfm/); I haven't used it but it seems to be another tool ...


8

With the release of GDAL 1.10 this is now possible. It is done by performing a basic transformation in ogr2ogr and supplying the control points in the -gcp tag. http://www.gdal.org/ogr2ogr.html For a guide please see: http://gisforthought.com/georeferencing-vector-data-using-qgis-and-ogr2ogr/


8

It depends on what version of the LAS specification you are using. If it is 1.3 or less, then the specs define georeferencing information using pre-defined (see specs) variable length records (VLRs) using the same format as the GeoTIFF: Georeferencing for the LAS format will use the same robust mechanism that was developed for the GeoTIFF standard. ...


8

During geo-referencing you are asked to save the new file somewhere. Check that location. It could be good practice to save out the control points you create in case this issue ever happens again.


8

Try using Paint.NET. As of my last testing (GIMP, Affinity, Photoshop), this is the only "traditional" image editing software to properly preserve GeoTIFF metadata. Be aware that at current, not all bit-depths found in GeoTIFFs are supported, but "major" ones are (32bit, 24bit, 16bit, etc). Fixed: EXIF metadata of type Float and Double are now ...


7

Here is another workflow, using ogr2ogr with GCP points: Extract the lines as svg (as above) load into inkscape and save as dxf Load into QGIS, with EPSG:31467 as CRS Read a couple of coordinates from significant edges of the surrounding city border Open OSM editor JOSM and download the relation 62591 of the city border Save that as GPX Load the border into ...


7

You need to enable it in the plugins menu. Goto 'Plugins' > 'Manage and install plugins' > 'Installed'. Then make sure GDAL Georeferencer is ticked.


7

Try using Paint.NET. As of my last testing (GIMP, Affinity, Photoshop), this is the only "traditional" image editing software to properly preserve GeoTIFF metadata. Be aware that at current, not all bit-depths found in GeoTIFFs are supported, but "major" ones are (32bit, 24bit, 16bit, etc). Fixed: EXIF metadata of type Float and Double are now ...


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