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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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Source for satellite images without geometric correction

I need satellite images for a university project and they must not have passed through geometric correction. So far the images I have found are already geometrically corrected in some form. Is there a ...
k355l3r5yndr0m3's user avatar
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36 views

I want to georeference a raw image, which is not georeferenced and does not have coordinate info, with Sentinel-2 image using GDAL in Python [closed]

The ground sampling distance ( also refers spatial resolution) of the raw image = 6.5 meters and sentinel 2 image = 10 meters. I warped raw image to sentinel image using OpenCV. First, I found the ...
Cando17's user avatar
2 votes
1 answer
73 views

Generate TFW files without rewriting the GeoTIFF [duplicate]

I have about 20000 GeoTIFFs that I need to create tfw files for. Is there an easy way to extract the georeferencing information from the GeoTIFFs and write the tfw file, without having to rewrite the ...
JDH's user avatar
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Aligning two digital surface model from same field from different dates [closed]

I have digital surface models and as well as orthomosaic from multispectral images containing 5 bands stacked. I have DSM and ortho of the same field from different dates. For georeferencing RTK ...
SS101's user avatar
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1 answer
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Shifting / moving entire layer in QGIS

I'm trying to work on two sets of data : Public roads (official source, purple on the image) Network data (private source, brown on the image) Both layers should overlap (at least, the network data ...
Vincent Monteil's user avatar
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36 views

Trying to find projection of PNG image of Central Asia

I have the following map: I am trying to figure out what projection this is in. I tried many but nothing lines up... I also tried the georeferencer in QGIS but the results are very lacking. How could ...
Skerre's user avatar
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5 votes
1 answer
211 views

How to reduce file size of B&W GeoTIFFs

I am working with a lot of old black and white maps extracted from scanned PDFs. When I use the QGIS georeference the resulting files are much larger than the original 10x to 100x. Is there a way to ...
bpatey's user avatar
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Reprojecting image with ground control points in geodetic CRS to equidistant cylindrical CRS on sphere

I'm working with some satellite data from the Mars Reconnaissance Orbiter context camera (CTX). As a sanity check for some later processing that I would like to do, I'm trying to take the raster data ...
reivax's user avatar
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-1 votes
1 answer
41 views

What's the best georeferencing setting to select to georeference an irregular projection? [closed]

So, I am essentially planning to use georeferencing to shift a neogene North America map to the rough shape of modern North America. Now, I generally use Polynomial 3 when georeferencing because it ...
The Great One's user avatar
0 votes
1 answer
31 views

Georeference one vector layer using another vector layer in ArcGIS Pro?

I'm unsure if this what I'm looking to do is possible... I have two polygon layers - the orange layer is georeferenced and blue is not. The pink is just a boundary layer (can be ignored). The orange ...
Alex's user avatar
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Georeferencing drone image different pitch-values

I am trying to georeference objects on an image. The image has been taking by a drone and I know the drones parameters. Here is my script: from math import radians, cos, sin, asin, atan2, degrees from ...
simonericmoon's user avatar
3 votes
1 answer
74 views

QGIS 3.34: Permanently saving file name and location for georeferencer's output file

Is it at possible to permanently change the file name template for the georeferencer's output raster file? I would like to save my files as source-directory\georef\original-filename georef.tif ...
march17's user avatar
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0 answers
29 views

Transformation of a point with GDAL

I know the place where the image was captured and I've made pixel to lat-lon correspondences (GCPs). After running the following GDAL commands a .tif file is created. gdal_translate -of GTiff -gcp {...
user8083314's user avatar
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Error in georeferencing using QGIS

I was georeferencing a tiff image. But the Georeferenced output is showing GCPs only. The image is not being georeferenced.
Swathy's user avatar
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Is there a way to change the color of the black pixels generated by georeferencing? [duplicate]

When I georeference, QGIS creates black pixels to fill the empty space caused by rotation. As a background, so to speak. How can I set it to be white pixels instead of black? This is the *.tif i get ...
user240107's user avatar
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27 views

Converting PDF Map Coordinates to Projected Coordinate

I am trying to georeference a number of PDF documents automatically. I am able to extract the vector data from the PDF - the data is a series of lines representing cadastral boundaries. I can load ...
Keagan Allan's user avatar
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QGIS georeferenced layers slightly out

I am georeferencing three different maps that include collected data. I take pictures of the maps in order to georeference them (with as near the same set up for all e.g., tripod distance etc). I save ...
PastOceans's user avatar
0 votes
0 answers
77 views

Click and drag georeferencing

I am looking for a way to take a group of layers in QGIS and be able to move/geolocate them. I need to offset hundreds of TIFF raster files that are currently in a QGIS group, and I don't have a ...
CaptainFishboy's user avatar
1 vote
1 answer
86 views

How to enable automatic georeferencing of hand drawn lines

Our company does a lot of bird surveys, we often need to draw flight patterns on a paper maps and convert these lines into shapefiles to create digital maps (e.g. of migration routes) for our reports. ...
chente's user avatar
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1 answer
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How to break up layers when georeferencing in QGIS when adding to project

I'm trying to take an Illustrator file that has multiple layers, and get it into QGIS to georeference each layer. I've been able to get the entire polygon in as one layer, but I can't figure out how ...
ScottAlanTurner's user avatar
3 votes
2 answers
170 views

Wrong parameters when georeferencing single drone images

I am using a DJI Mavic 3M drone to capture images from the ground view. DJI provides a guide on how to correct the images for the lens distortion. Each captured image contains XMP metadata about the ...
nmhng's user avatar
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1 vote
0 answers
46 views

How to create a transformation vector and apply it to a vector layer?

I have 3 layers I'm working with. I'll call them A,B and C. Layer A - Satellite Imagery of location X (2017) (tiff) Laber B - Satellite Imagery of location X (2021) (tiff) Layer C - Vector Polygons of ...
Kevin K's user avatar
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0 votes
1 answer
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How would I go about efficiently digitizing intersecting polygons from a georeferenced map by snapping vertices in QGIS?

I have a map I've georeferenced in QGIS that has a lot of intersecting and adjacent polygons. I want to efficiently snap the vertices together as I draw the polygons because I don't want overlaps and ...
MapDeath's user avatar
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1 answer
85 views

QGIS - Serious loss of resolution when georeferecning

I have a PDF which I want to georeference. I am using QGIS 3.28 and have gone to Layer > Georeferencer. However, when I load in the PDF that I want to georeference there is SIGNIFICANT resolution ...
guest_231213's user avatar
1 vote
0 answers
76 views

Georeferencing rasters using GCPs in R: stars/terra equivalent of gdal_translate / gdalwarp?

With the retirement of rgdal and transition to sf/stars/terra functions in October 2023 now passed, is there a way of georeferencing raster images with GCPs (Ground Control Points) other than using ...
Thomas Moore's user avatar
3 votes
1 answer
94 views

Cropping georeferenced map JPEG within QGIS

I have a geology map I georeferenced in QGIS, but I want to crop out the edges/margins/legend because I have other geology maps I want to georeference and stitch next to it, but the unused margins of ...
MapDeath's user avatar
  • 343
0 votes
0 answers
38 views

QGIS3 georeferencing an unreferenced PNG and it isn't showing up on my base map

I'm using QGIS3 to try to georeference a screenshot of an old map of a state park (the PNG file) to a shapefile of the park's boundaries by matching points in the park's boundary. When I tell it to ...
help-ref's user avatar
0 votes
1 answer
83 views

Overlaying PDF map onto satellite image using Google Maps

I have a PDF map of property limits (black lines on white background). I'd like to overlay it onto a satellite image (google maps is fine, but really any that is precise enough) to show errors in the ...
dargaud's user avatar
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72 views

Projection issue between WGS84 and EPSG:2100

I got a new GNSS receiver (Sparkfun RTK Faucet) and I also setup my base station. Now I am collection GPS date points down to an accuracy of about 14mm. My goal is to convert the data points to the ...
Stephen's user avatar
0 votes
1 answer
36 views

CRS for georeferencing TCP flight maps of Spain

I want to georeference TCP flight map of Spain. It says: Lambert Conformal Conic Projection Standard Parallels 41dg 20' and 46dg 40' Convergence factor 0.69491 QGIS does not offer this CRS and even ...
Vladimir Z.'s user avatar
0 votes
0 answers
26 views

How geolocalisate a new image with a polygon (JSON file)

I am new using QGIS. I got an Sentinel-1 image from Copernicus I downloaded it as TIFF. I did Python code to detect water so now l have a new plot. I would like this plot gets the same coordinate than ...
jeremy's user avatar
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30 views

What does QGIS look for when displaying a projected SAR images in an HDF5 file and ENVI HDR file?

I have worked with ENVI HDR files and I know that the information tag which is used by QGIS is the geo points and map info tags. Which I generate by using GCP corner points and feeding them to ...
Tarun Maganti's user avatar
1 vote
0 answers
67 views

How to georeference a radar PNG/GIF in Python [closed]

I have this data (image attached). I need to georeference it using the data available in the image itself. Additionally I have one pair of coordinates for the said image provided. 17.74811366,83....
Ayushi Sharma's user avatar
3 votes
1 answer
94 views

Image Resolution degrading when georeferencing

I have a scan of a historical map in pdf. I converted it in to png as well as tif and then georeferenced it. However, as soon as I load the image (both png and tif) in to the georeferencing tool the ...
Lina's user avatar
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0 votes
0 answers
21 views

Georeferencing CAD floor plans

I am working on a project, where I need to georeference CAD data for buildings with several floors. I'm using ArcGIS for this. In earlier ArcGIS versions it was possible to simply georeference the ...
Valleso's user avatar
0 votes
0 answers
30 views

Removing Raster from Map View using ArcGIS Pro

I am converting from ArcMap to ArcGIS Pro 3.x. I have a number of rasters that were georeferenced in ArcMap that I have brought over to Pro. I have - I think - worked out a way to place these ...
wacole1213's user avatar
0 votes
0 answers
98 views

Fixing my workflow on converting bounding box(object detection) to actual coordinates based on .tfw

I am trying to convert the Yolov8 detected bounding box locations to actual coordinates and export them to ArcGIS or other GIS software as point data. I'm working on Windows 11 Python 3.9. It kind of ...
SunnyD's user avatar
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1 vote
0 answers
58 views

Assign CRS for drone imagery

I am importing TIFF imagery from the Phantom 4 Multispectral drone which does not have predefined CRS. When I double click the layer and go into the source tab and select a CRS, it displays over the ...
Jas Singh's user avatar
1 vote
1 answer
48 views

Georeferencing using QGIS

I georeferenced two maps for project. Points that were referenced are now stuck on my main project and I don't know how to get rid of them.
Cian Cassidy's user avatar
1 vote
1 answer
68 views

How to apply "direct georeferencing" with PTZ camera?

I have images taken from Mavic 2 drone over the ocean, and the images have been taken with the orientation angle (roll, yaw, pitch) of both drone and gimbal. With these tilted environment, I want to ...
JOEY's user avatar
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2 votes
0 answers
56 views

CRS to use to georeference an 19th century Ordnance Survey 1 Inch map

I have a raster of an Ordnance Survey 1 inch map that was surveyed in 1843-57 and subsequently revised in 1896 and published in 1898: Sheet 50 - Hawes. When georeferenced in QGIS using OSGB36/British ...
flyhigher's user avatar
  • 143
0 votes
0 answers
23 views

Projection issue QGIS3.2 [duplicate]

I georeferenced all my layers and set it to NAD83 CRSUTM 17N for the whole project, as well as individual layers. Checked and re-tried everything but the raster is still ending up in water somewhere ...
Ri_s's user avatar
  • 1
0 votes
2 answers
49 views

How to georeference a big file without creating an output file

Using QGIS 3.28.11, I have a very big file (0,5 Gb) which is oriented but not to scale (definition unknown) and not georeferenced (but the coordinate system used when creating the file is known). Is ...
Henème's user avatar
  • 33
0 votes
0 answers
39 views

What points should I add or sampling should I change to get a better georeference within QGIS?

I am working with an image that I need to georeference onto a base map. I have already added two other images to the map with minimal issues. They are not 100%, but they are good enough for this. ...
Paul Carlson's user avatar
1 vote
1 answer
65 views

Trying to determine which CRS this GML uses

I am trying to locate an area that is currently in GML format. I know it is somewhere in Istanbul but I need to know which Coordinate Reference System (CRS) it uses to overlay it with other maps. ...
Gülce's user avatar
  • 13
0 votes
1 answer
43 views

QGIS navigates to some other coordinate locations...Facing problem while dealing with coordinate systems

In QGIS 3.32, I want to do Geo-referencing of a vector shapefile. The project coordinate system is Projected Coordinate System WGS 84 / UTM zone 43N EPSG 32643. Two layers (Google Satellite Hybrid AND ...
HNA's user avatar
  • 1
0 votes
0 answers
91 views

PDAL translation seems to be causing a scaling

I'm trying to georeference a .laz pointcloud in order to correctly show it in QGIS on a map. I notice however that while using the pdal transformation, there is a change in the scale of the point ...
RobbeVl's user avatar
0 votes
1 answer
102 views

Move GCP point in QGIS Georeferencer

I can't figure out how to move a GCP in the QGIS Georeferencer. In the georeferencer I click on the "Move GCP Point" icon and a cross-hairs appears on the map image. I center the cross-...
Mark Polczynski's user avatar
0 votes
1 answer
31 views

QGIS Georeferencer points file saving projection data

After georeferencing .points file shows some unnecessary data like CRS data and some other, I want that after georeferencing points file keeps only points coordinate data. Is there any chance to ...
Nika Nemsitsveridze's user avatar
0 votes
1 answer
67 views

How does one encrypt a georeferenced PDF map

As a hobby I make georeference PDF maps on QGIS and use it on Avenza Maps for hiking trails remote reserves. Is there anyway to encrypt the map so it cannot be shared? I put many hours into a map ...
Rob's user avatar
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