Questions tagged [georeferencing]
Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.
1,106
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Data from map and attribute table disappeared after saving
I am relatively new to QGIS and have been doing some simple georef and digitising work. At the start I lost a lot of data, as I hadn't saved properly, and I have been constantly saving ever since.
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3
votes
1
answer
12k
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Missing Georeferencer in latest QGIS 3.28 [duplicate]
I've just updated my QGIS to the latest version 3.28. Then I realised that my georeferencer tool dissappeared from the Raster tab.
Then I go to my plugin dialog, I couldn't find georeferencer in ...
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305
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Georeferenced TIFFs that don't display in QGIS
I have a few TIFF images that were georeferenced by a third-party using ArcGIS.
When I import them in QGIS, I have the following Layer Error:
IReadBlock failed at X offset 0, Y offset 0: libjpeg: JPEG ...
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1
answer
69
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Excel table with X and Y values doesn't convert in point layer correctly
I have an Excel table with the X and Y values that I have added to QGIS 3.18.
Y want to georeference this table in points, so I follow these steps:
Process toolbox -> vector creation -> create ...
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0
answers
144
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Wrong georeferencing in raster exported form .ovr file
I am working with a bathymetry that has been shared with me in .ovr format, when pulling to QGIS I realize that it has wrong coordinates, it is supposed to be at 20° latitude and it is at 0°.
I have ...
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1
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94
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Loading DXF data with original dimensions into QGIS
I have many DXF files. And these are architectural drawings.
In QGIS, I want to place buildings in their real locations on earth, and I am preparing a plugin for this.
But when I export the DXF data ...
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1
answer
62
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Offset after georeferencing of an old maritime map of Quebec
For some time, I have been trying to georeference an old map of Quebec. On photo 1, there is the indication on the projection.
Map from 1936-1937, with small corrections in 1946
I use the coordinate ...
2
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0
answers
170
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Python: Spatially interpolate between two lat/lon grids with different dimensions and resolution
Let's say that I have two datasets.
The first dataset is sized [14000,7000] and represents terrain data throughout the CONUS. This data is equally-spaced 0.005-degrees in terms of latitude / longitude....
2
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1
answer
941
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Enable input DMS option in ArcMap while georeferencing
I am a newbie to ArcMap. I tried to georeference a map in JPEG format using the "input DMS..." option. But it is grayed out, the only option available is to choose X, and Y coordinates even ...
2
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0
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127
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Problem with wrong DEM output after georeferencing
My goal is to georeference a DEM tiff file that I have with a reference orthophoto.
Steps to reproduce
Open orthophoto (EPSG2056) in QGIS
Open the DEM (EPSG2056) in the Georeferencer
Add GCP (I am ...
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125
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Automated way to georeference borders in QGIS?
I have a picture of a map containing the borders of administrative areas, similar to this one:
I know how to georeference the picture using QGIS. Is there a way to let QGIS recognize the borders of ...
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0
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50
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QGIS-LTR georeference error
I am attempting to georeference an image in QGIS-LTR basically following the tutorial here (https://www.qgistutorials.com/en/docs/3/georeferencing_basics.html). I put in six points and hit the green ...
2
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1
answer
300
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Improve the quality for a raster PNG in Georefrencing QGIS
I imported a raster .png file (convert from .svg) in Georeferencer, the resolution is acceptable but after the geo referenced layer is placed on top of the map, it becomes a blur.
I tried this GRASS ...
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0
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71
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Georeferencer Error
I added 5 points in the Georeferencer, but it didnt show in the QGIS XYZ Tiles.
When I click the Start Georeferencing it shows the error.
QGIS version: 3.26.3
Raster: .jpg
XYZ Tiles: OSM
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5
answers
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QGIS 3.26 Georeferencer Failing to Create Destination File
I have been trying many times to georeference a simple plan but I continue to get the error "Transform Failed: Could not create destination file". I have changed folder locations, tried ...
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0
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How to change default suffix in filenames of georeferenced images
We would like to change the default suffix, which is appended to the file name when specifying transformation settings in the Georeferencer.
Is it possible to change this in the settings somewhere?
...
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2
answers
2k
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Georeferencing an image that I know four corner points, CRS and their coordinates with GDAL or Rasterio in Python
I have some scan files with spatial information.My Original Image
In the example image, the rectangular area drawn with the blue line is my area containing spatial information. In the four corners of ...
3
votes
1
answer
385
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WFS layer imported via QGIS, features are rotated/flipped, how can I correct this?
I have made a connection to this WFS layer through the QGIS data source manager:
The layer takes a very long time to load, but when it does it appears flipped and rotated:
I think this has something ...
0
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0
answers
102
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Georeferencer producing unusable results
Using QGIS 3.26.1 Buenos Aires.
I am georeferencing orthophotos produced with an RTK drone and Reality Capture software. These are typically a few centimetres out of alignment with one another. ...
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1
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617
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NetCDF file and shapefile in wildly different locations and of disproportionate sizes when projected with the same CRS on QGIS?
I am trying to map global greenhouse gas emissions data from the European Commission's Emissions Database for Global Atmospheric Research (EDGAR) and Northern Arizona University's Fossil Fuel Data ...
2
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1
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419
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Georeferenced image tilting
I need to Georeference a map which is given in .jpg format (Data source).
I reference the map using QGIS Georeferencer. The Georeference was successful and coordinate system was saved to WGS 84/UTM ...
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0
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117
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How can you georefernce rasters on the fly in QGIS
How can you georefernce rasters on the fly in QGIS.
In ArcGIS Pro when I start georeferencing and adding control points the raster will start to shift as I’m plotting the control points. So I can see ...
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456
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Setting the right projection for a georeferenced PNG image
I have been trying to georeference an image I downloaded from Google API.
Here is how I approached it after many unsuccessful attempts:
I calculated the coordinates of the corners using this code.
I ...
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0
answers
68
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No Raster Georeferencer in PLugin List QGIS 3.26.1-Buenos Aires [duplicate]
I have QGIS 3.26.1-Buenos Aires
The Raster Georeferncer is not located under "Raster"
Nor does it appear when I search for "Georeferencer" in the "Manage and Install Plugins&...
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0
answers
75
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Batch Georeference with GCPs in QGIS OR merge GCPs
Problem:
I have ~100 black PNG tiles that show nothing but prairie creeks (black-creeks tiles)
I have ~100 map PNG tiles with creeks and background map (map-creeks tiles) that I can use to ...
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0
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89
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Georeferenced raster not even generated in QGIS [closed]
I am trying to superimpose an old map on top of a Google Satellite image, but for some reason, the raster layer won't be generated with Georeferencer and be shown in the layers window even when the ...
0
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0
answers
984
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Extracting and georreferencing shapefiles from a PDF file
I am trying to extract and georeference the orange polygons/lines from this PDF file of the city of São Paulo, in Brazil.
To do so, I am mostly trying to follow what was discussed in another question, ...
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2
answers
18k
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Finding Georeferencer in QGIS
I'm using QGIS 3.26 and I can't find the Georeferencer.
I've basically looked everywhere. It should be in the raster section, but it isn't there. I checked all of my plugins if there was anything, but ...
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1
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82
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Georeferencing set of historical maps to each other then georeferencing set to current map using ArcGIS Pro
I have a set of 10 hand-drawn maps from the 1930's that all appear to have the same carbon-copied basemap (the streets and shorelines look identical). They were scanned from Arch D size linen paper so ...
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1
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51
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Does LiDAR tend to georeference better than photogrammetry?
I noticed whenever I get a photogrammetry dataset, the products (like DTM, DSM) are always misaligned from satellite imagery of the same area by a few metres. Today I received a LiDAR dataset and they ...
2
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2
answers
389
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Using Georeferencer in QGIS
I am using QGIS 3.22 Stable version.
I'm trying to georeference two dat. files with Georeferencer plugin in the 'Raster' section of QGIS. I manually choose all the points using "tsunami_before&...
2
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1
answer
165
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Problem generating GeoTIFF from JPEG using GQIS Georeferencer tool
I am trying to follow this tutorial to convert a JPEG image of a WGS-84 Web Mercator world map to a GeoTIFF file using QGIS, but am failing to do it correctly-- the map comes out with black-hole-like ...
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1
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Does GDAL 3.x/PROJ 7.x do some kind of bounds checking when doing a gdalwarp operation?
This is more of a question about how GDAL 3.x and PROJ 7.x work more than a question about how to do something. I have been experimenting with GDAL 3.4.2 and have noticed some things that are ...
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1
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223
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Georeference a map with lambert conical orthomorphic projection
Could you Please help me with the issue of georeferencing, I have an old map of the city of Tripoli, I want to georeference it. What type of projector should I should use?
in the image the lambert ...
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0
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231
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Georeferencing Google Map image with GDAL, display coordinate values in WGS84
Framing this post with the question first.
Question
Can a GeoTIFF based off of the Google Mercator projection be warped or transformed to display WGS84 lat/long coordinates as opposed to northing/...
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1
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Finding real world reference points on assessor's map
This is probably a very basic question, but I don't even know the right terms to use to start searching for what I need. I'm new to this, but I want to learn.
I have the following assessor's map, and ...
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2
answers
509
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Convert Google Maps image to ArcMap
I would like to import a Google Maps image of Costa Rica into ArcMap and create a shapefile of this region. A screenshot of the selected region has been taken and I want to process it into ArcMap and ...
2
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1
answer
604
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Georeferencer QGIS Import jp2 - Export jp2? - Is that possible?
I would like to do a georeferencing via QGIS 3.22.5.
I'm using the standard implementation at the menu point "Raster" -> "Georeferencing". My import file is a jp2-format and ...
1
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0
answers
264
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Creating polygons from rasters using color values via a color sampler in QGIS
This seems like a question that should have been asked, but the trick with all this is in knowing how to ask the question. I would like to use the background satellite imagery from GE or Bing or ...
3
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0
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258
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How to specify visible extent of raster in QGIS without clipping original
Is there a way to limit how much of a raster is shown in QGIS3 without clipping the raster to a new file?
In my old workflow from Arcmap I would georeference scanned maps or rasters with tics in the ...
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1
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761
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Georeferencing PNG from bounding box in GDAL?
I have an image in PNG format and bounding box coordinates (upper left, lower right). How do I georeference it using command-line interface tools such as GDAL (or Python if it is not possible)?
In the ...
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0
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Does the QGIS Georeferencer have a point prediction function?
When taking GCP using Georeferencing in QGIS,
Is there a point prediction function?
For example, when working on GCP in an ERDAS program, put reference coordinates (ex: 10 coordinates)
After taking ...
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1
answer
100
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QGIS PROJ custom CRS for only shifting X and Y
I'm not very fluent with CRS and custom CRS but I'm only want to shift X and Y WGS84/32N coordinates.
For example: with point A(115633.49, 57104.49) of my maps,
in EPGS:32632 would be A(1112126.15, ...
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1
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273
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How to georeference image with GCP in aux.xml using Affine transformation
I'm trying to automate georeference of big amount of non/georeferenced image file stored in TIF format to work with them in QGIS 3.16.4-Hannover.
These TIF files are 8 bits (B/N) and I only have aux....
5
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1
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1k
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Difference between control point, reference point, and tie point
I georeferenced a map using grid coordinate and road network shapefile (e.g. intersection vertex) as a control point. I didn't acquire a control point through the survey.
I use "control point (...
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0
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1k
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BlenderGIS: georeferencing and exporting 3d model?
I can add a georeferenced basemap using BlenderGIS and overlay my 3d model on this basemap.
I want to export this 3D model as a georeferenced file, but only see a shapefile export option (which cannot ...
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1
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42
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Georefence a PPM raster with GDAL
I have a PPM with a GEO file but GDAL does not recognize the GEO file.
emwin@weather:~/SPLAT/bin$ cat roeske_bridge.geo
FILENAME roeske_bridge.ppm
# X Y Long Lat
TIEPOINT 0 0 ...
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0
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127
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How to calculate rigid geotransform (scaling and rotation only) from GCPs in Python
I've been georeferencing images using automatically detected GCPs using Rasterio but it only has Affine transforms. I'm aware that QGIS has some rigid transforms as an option in the Georeferencer tool ...
2
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3
answers
312
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Georeferencing a large set of points
I have a static image of a map:
And I would like to obtain the coordinates of each blue point. I am very new to QGIS but I have done a very similar task but for a much smaller set of point. My ...
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0
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42
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QGIS georeferencer - user profile problem
When running the georeferencer I sometimes find that the progress indicator hangs after a few seconds with a non-responsive message following which the program becomes unresponsive and QGIS needs to ...