5 votes
Accepted

Cropping georeferenced map JPEG within QGIS

Create the drawn blue polygon as a true polygon, then just use Raster - Extraction - Clip raster by mask layer.
John's user avatar
  • 1,799
5 votes
Accepted

Hotkey for switching between pan and add point in QGIS georeferencer

With 'Add point' selected hold spacebar to toggle 'pan mode'. Releasing spacebar will return to 'add point' mode. Couple that with the mouse scroll wheel for zooming in/out for a faster workflow.
Cushen's user avatar
  • 2,918
4 votes
Accepted

Which resampling method to use when georeferencing with QGIS/GDAL

Every resampling method has different characteristics and is used for different purposes. Nearest neighbour method is used for discrete data because don't assign new values on calculated pixels. ...
Kostas Pl.'s user avatar
4 votes
Accepted

High-quality PDF becomes pixelated when opened in QGIS

Since QGIS uses GDAL to load PDF files, we could set an Windows/Linux/iOS environment variable GDAL-PDF-DPI=300 to increase the raster quality from 150dpi (default) to 300dpi.
christoph's user avatar
  • 5,565
4 votes
Accepted

Trying to determine which CRS this GML uses

Use projfinder.com. Stick your coordinates in the box, zoom the map to where you think the point should roughly be, click "Find My Projection" and it scans thousands of projections and sees ...
Spacedman's user avatar
  • 63.4k
4 votes
Accepted

Wrong parameters when georeferencing single drone images

My experience is with a Mavic Mini, which does not have published lens distortion specs and has only consumer-grade GPS, not RTK correction. With that caveat in mind, I've found you just need to ...
Houska's user avatar
  • 7,976
3 votes

Image Resolution degrading when georeferencing

You can directly load your PDF into the Georeferencer canvas. QGIS uses the GDAL config option GDAL_PDF_DPI to set the resolution of the PDF. The default value is 150. You can increase this value with ...
christoph's user avatar
  • 5,565
3 votes

Accurate Georeferencing of ETRS89-Projected Image and Conversion

tl;dr: Use EPSG 31467. Germany has a surprisingly huge number of "official" CRS for a rather small country. Most used are 25832 (ETRS98 - UTM Zone 32N) 25833 (ETRS98 - UTM Zone 33N) which ...
Erik's user avatar
  • 16.1k
3 votes

Is it possible to georeference drone images in QGIS?

This is a complex topic and a perfect answer is difficult. Incremental steps in order of difficulty. The GPS locations of the camera are stored in EXIF tags, generally Exif.GPSInfo.GPSLongitude and .....
Houska's user avatar
  • 7,976
3 votes

Is it possible to georeference drone images in QGIS?

You certainly can georeference images with QGIS. See this tutorial. From your comments about angles of the gimble I suspect you are asking if you can automatically georeference images in QGIS. That ...
GBG's user avatar
  • 9,654
3 votes
Accepted

Use Georeferencer GDAL plugin on QGIS to create a GeoTIFF if the latitude and longitude boundaries are known for a raster image

Yes, you could build your own control point file with a text editor. Then import that text file inside the QGIS georeferencer. Here is an example of a control point file on windows named myfile....
GBG's user avatar
  • 9,654
3 votes

How to georeference a PNG in ArcMap without losing transparency?

I am assuming you are talking about ArcGIS 10.x since your post does not mention Pro. After you geofererence your image (with an existing alpha band that is transparent) your transparency should ...
GBG's user avatar
  • 9,654
3 votes

Hotkey for switching between pan and add point in QGIS georeferencer

With 'Add point' selected, left-click to add a point, middle-click (click scroll wheel without scrolling it) and drag to pan. No hotkey required.
user2856's user avatar
  • 65.5k
3 votes

How can I convert South and West coordinates to align to X/East and Y/North in QGIS?

You can do this without using the georeference tool as you have the information to write your own world file. From wikipedia the world file structure is as follows Line 1: A: pixel size in the x-...
Sethinacan's user avatar
  • 1,714
2 votes
Accepted

Warping ArcGIS 9.2 georeferenced TIFFs using GDAL warp

GDAL did not support just that combination of ESRI variant of ground control points, TIFF, and aux.xml file. GDAL developers have verified and fixed the issue https://github.com/OSGeo/gdal/issues/...
user30184's user avatar
  • 64.7k
2 votes

In QGIS Georeferencer: Mysterious OGR Driver Error: not found OGR

I found the solution! It is a weird one but hear me out. This issue is related to the FILENAME you give your georeferenced image. The files i wanted to georeferenced were named: ...
David SSS's user avatar
2 votes

Is it possible to georeference drone images in QGIS?

It is not a good idea to georeference distorted drone images in QGIS. Why don't you use an other open source software to generate true orthophoto from those images? For example OpenDroneMap or WebODM ...
Zoltan's user avatar
  • 7,265
2 votes

Georeference toolbar in QGIS does not show up

Well, I found it under the Layer tab. Apparently it has been moved there since version 3.26.
Paris's user avatar
  • 591
2 votes
Accepted

GeoJSON points not referencing to OSM map in QGIS

At a guess, you've got your latitude and longitude mixed up. You haven't said where you expect the points to be, or how you generated them in the first place, but [34,-84.5] is somewhere around ...
Tom Brennan's user avatar
  • 4,652
2 votes

How does one encrypt a georeferenced PDF map

Maps downloaded from Avenza are locked in root directories and not available to the users outside of the Avenza PDF Maps application. A phone or tablet owner who has rooted their Android device (or ...
GBG's user avatar
  • 9,654
2 votes

How can I convert South and West coordinates to align to X/East and Y/North in QGIS?

I think this is a misunderstanding. I believe the labels on the entry fields are just saying that first axis is positive in the East direction and labeled X while the 2nd axis is positive in the North ...
mkennedy's user avatar
  • 18.9k
1 vote

QGIS - Serious loss of resolution when georeferecning

In the Output Setting box, make sure to fill in your required image resolution (in pixel dimensions) in the same units as the destination georeferenced file. If the image is in geographic degrees, you'...
HDunn's user avatar
  • 8,616
1 vote

Overlaying PDF map onto satellite image using Google Maps

You need to make map tiles use QGIS Desktop to build folder of Tiles and then give the https://someurl/somefolder/z/x/y.jpg url to your map
Jordan Bess's user avatar
1 vote

CRS for georeferencing TCP flight maps of Spain

Both can be correct, but consider these: Setting up the correct parameters for the projection, anyone can use export to any different projections and everyone will get the same result. Using warp you ...
Zoltan's user avatar
  • 7,265
1 vote

How to georeference a big file without creating an output file

One alternative is to use gdal_edit https://gdal.org/programs/gdal_edit.html that can update the metadata of the image file without re-writing the pixels. The utility has three options, consider if ...
user30184's user avatar
  • 64.7k
1 vote

Georeferencing Polygon Features using ArcGIS Pro

The vector equivalent to georeferencing of raster data is spatial adjustment. To do that in ArcGIS Pro see Is the Spatial Adjustment toolbar available in ArcGIS Pro?. That FAQ refers you to the ...
PolyGeo's user avatar
  • 65.1k
1 vote

GeoJSON points not referencing to OSM map in QGIS

You have to: set your layer crs to 4326 the crs of the osm-Layer to 3857 the project crs to 3857
Thomas B's user avatar
  • 8,797
1 vote
Accepted

How to give a coordinate to *.tif?

If you know the pixel size of the images (or the ground size of the image) then you can create a world file for the image. Line 1: A: pixel size in the x-direction in map units/pixel Line 2: D: ...
Ian Turton's user avatar
  • 81.1k
1 vote
Accepted

Is QGIS Server's PDF output georeferenced?

Yes, it's possible to create georeferenced PDFs with QGIS Server's GetPrint Request, but it's not possible to create GeoPDFs with layers included. If you enable "Append georeference information&...
christoph's user avatar
  • 5,565
1 vote
Accepted

How can I convert South and West coordinates to align to X/East and Y/North in QGIS?

So my issue was in the Coordinate Reference System I was using. Since it crossed the anti-meridian line, I needed to change the CRS to "move" the CRS so my image can lay between those points....
IT_User's user avatar
  • 131

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