Questions tagged [georeferencing]

Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.

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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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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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Move layers from a qgis project to an other

I was working on a non georeferenced qgis project and when I tried to drag and drop the layers from this project to a new georeferenced raster layer the other layers didn't show up. Some notes: The ...
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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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Can't get Georeferencing GDAL to work in QGIS 3.26.1 [duplicate]

I have installed and reinstalled QGIS using both express and advanced install and to no avail can I get the georeferencing GDAL plug in to appear. It does not appear in the raster drop down and it ...
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Assigning geolocation to shapefile [duplicate]

I received shapefiles from the Senegalese city (probably a conversion from AutoCAD) not georeferenced. What can be done to solve this problem ?
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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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Automated aerial image registration/GCP definition in QGIS ecosystem

I have a couple of aerial orthos from different sources and different years (governmental agencies, UAV mapping, etc). Unsurprisingly, they are not perfectly aligned, in a nonlinear way (i.e. it's not ...
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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 ...
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Getting massive residuals while trying to georeference an image

I have a TIFF of a historic map that I have downloaded, and this file already has projection information. The file's projection is EPSG:27700, which is the same as my project CRS. I am trying to ...
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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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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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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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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 ...
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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&...
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1 answer
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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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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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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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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 vote
1 answer
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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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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 ...
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2 votes
1 answer
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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 ...
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1 vote
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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 ...
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3 votes
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35 views

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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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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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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How to resample when using Georeferencer in QGIS?

How to resample when using Georeferencer in QGIS? QGIS wants to take GCP using Georeferencing. I have been working on GCP using ERDAS, and even if I zoomed in using 'resampling method-bicubic ...
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  • 447
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1 answer
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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 vote
1 answer
55 views

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....
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4 votes
1 answer
132 views

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. so I use "control point (...
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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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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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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 ...
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Automated georeferencing 3D (multipatch) geometry in ArcGIS Pro?

After importing a 3D Collada (.dae) file using the "Import 3D Files" tool, I need to georeference it using the Edit tools (move, rotate, and scale). This is a tedious and error-prone process....
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2 votes
3 answers
154 views

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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1 vote
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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 ...
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5 votes
3 answers
513 views

How to write a georeferenced GeoTIFF from known coordinates with Python rasterio

I have three numpy arrays, one with data, and two more with explicit longitudes and latitudes. I'd like to write this data to make a GeoTIFF file with rasterio such that I can load it with QGIS. The ...
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QGIS crashes when loading DWG file in Georeferencer

I am trying to use QGIS to georeference a CAD file. I open Raster/Georeferencer and then click on the Open Raster icon. The first time I tried this it warned me that it would only accept DWG R2000 [...
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2 votes
1 answer
168 views

QGIS georeferencing leads to wrong position

I'm trying to georeference a TIFF file in QGIS (version 3.20.0-Odense) based on a WMS layer (EPSG:4326). The project is in EPSG: 25832 and I used the same as output for the georeferencing (4 points, ...
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4 votes
1 answer
162 views

Continuous errors in georeferencing - rotated, scanned images in QGIS

I have >200 scanned maps for georeferencing (downloadable example). But as soon as I load them into the georeferencer in QGIS they appear rotated 90 degrees (E or W). Despite the rotation, when I ...
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Rectifying data source for MXD file using ArcMap

I tried to rectify my data source on ArcMap but was unable to locate my data file which is an MXD file. How can I rectify the data source for an MXD file ?
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2 votes
1 answer
124 views

Open Georeferencer with layer path in PyQGIS plugin

I develop a QGIS plugin that includes a step of georeferencing. I want to open the Georeferencer from QGIS and to load an image with its path when I click on a PushButton. I found this topic : Open ...
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How to efficiently find pixel coordinate in raster if affine transform is not, but coordinates of all pixels are given?

I have two 2D numpy arrays, one of them contains the latitudes, the other contains longitudes of a raster. For example: lats = \ np.array([[26.21965851, 26.21965851, 26.2196585 ], [26....
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Geo-referencing PNG with exact coordinates

For a bit of background, I am a novice when it comes to GIS stuff. I do a fair amount of geo-referencing of images but it has never had to be with exact coordinates like this project. I am trying to ...
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Georeferencing with only single coordinate

I'm currently examining the new proposed sampling points based on a drainage map without coordinates. Previously, I was only given a single coordinate given by the consultants for their monitoring ...
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1 vote
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GeoPDF added into QGIS gives a broken raster; GeoReferencing it gives an invisible output

I've been attempting to add a GeoPDF to my QGIS 3.16.14 project. The PDF is available here: https://reliefweb.int/sites/reliefweb.int/files/resources/reach_irq_map_mosul_city_reference_08nov2017.pdf ...
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Add column to the GCP Table in QGIS Georeferencer

I am using the QGIS Georeferencer plugin to georeference an aerial image. For each GCP, I would also like to track some metadata about that GCP—for example, whether the GCP is a natural feature, a ...
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GDAL georeference multiple PNG images as GEOTIFF with different size and extents

Following my problem described here: Georeferencing PNG image by GDAL in QGIS I would like to make some batch image georeference in GDAL. Unfortunately I couldn't find the reasonable solution for it. ...
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2 votes
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QGIS Georeferencer: How to deal with .points file using different CRSs?

I have some scanned maps as tifs and their corresponding .points files. The GCPs were set by different users erroneously using different CRSs. E.g. Of 340 points 180 were set using EPSG:23700, 160 ...
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Assigning georeference to NetCDF

I am trying to understand how to georeference a NetCDF DEM raster file (topo_d3.nc) using gdal_translate, by 'distributing' the raster pixels between the UL-LR coordinates - which I have extracted ...
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