Questions tagged [georeferencing]
Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.
1,120 questions
2
votes
1
answer
40
views
Getting Georeferencer target CRS with PyQGIS [closed]
According to the C++ code in qgsgeorefmainwindow.cpp I tried to retrieve the Georeferencer target CRS with PyQGIS using QgsSettings().value("/Plugin-GeoReferencer/targetsrs") but ...
- 2,556
4
votes
1
answer
194
views
Is stitching and aligning two layers a proper use of QGIS?
I'm a beginner who hasn't used QGIS before but am excited at the possibilities. I have an Esri World Topo and a tiff of an 18th century map. I would like to have the older map align with the topo. ...
- 65.4k
2
votes
1
answer
52
views
Exporting georeferenced image from WMS in QGIS
I was asked to provide a georeferenced cutout of an orthophoto from a WMS and I am using QGIS to do it. I am exporting the image with the option "Append georeference information (embedded or via ...
- 34.1k
2
votes
2
answers
2k
views
Highlighting area of map in QGIS
I would like to have a borderline around a subset South-South(SS) part of the map (Map 1) (More like highlighting the subset part).
I tried to clip a vector of the subset (map 2) to the entire map, ...
CommunityBot
- 1
1
vote
1
answer
45
views
Figuring out coordinates written as long numbers, no decimals
The label of these specimen tags says "NAD27 ConUS" which I know is the coordinate system, but this doesn't explain the coordinates which are written as "716935, 3474948".
The site ...
- 65.4k
2
votes
1
answer
162
views
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 ...
4
votes
2
answers
136
views
Georeference the second and the following pages of PDF in QGIS
I have a PDF with 7 pages. The first is a table of contents and the 6 following pages are 6 maps with the same map excerpt. The PDF does not contain geolocation.
I want to georeference page 2-6 but I ...
- 1,829
0
votes
1
answer
323
views
ArcScene - Spatial reference
I am having trouble merging different layers in ArcScene. As there is no such thing as the "Georeferencing" used in ArcMap, I am not able to view two different Layers in one document.
Is there ...
CommunityBot
- 1
0
votes
1
answer
58
views
Coordinate system of a screenshot from Google Earth
I have received a transport assessment for an intersection (swept paths created in CAD) and learnt the way it was created was by drawing an line in Google Earth - a known measurement (for example 20m) ...
- 20.3k
0
votes
1
answer
91
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 ...
- 65.4k
0
votes
0
answers
36
views
Enter coordinates in georeferencer QGIS 3.34 by copying - pasting coordinates from Google Earth
i want to copy the coordinates taken from Google Earth App and paste them in the window "Enter Map Coordinates" in QGIS when i add a point (while georeferencing an image extracted from ...
- 65.4k
1
vote
1
answer
254
views
How do I omit empty (black) tiles from a QGIS raster export?
At the moment I'm deleting these manually after export and I'm curious if there's another way.
I've currently imported a transparent TIFF layer and georeferenced it to Bing. I'm then exporting with ...
CommunityBot
- 1
0
votes
0
answers
28
views
Georeferencer GDAL not in my QGIS version 3.38.2 - Grenoble, any other tips? [duplicate]
I'm using QGIS in version 3.38.2 - Grenoble. I'm trying to georeference a tiff image, however there is no plugin in this version. I've done some searches on add-ons and I can't find it, is there a ...
- 69.6k
0
votes
1
answer
62
views
QGIS Georeferencer putting red residual lines in output pdf
Is there no way to erase/suppress or turn off the red adjustment residual error lines when you use georeferencing in QGIS? I have tried every combination of settings and adjustment algorithms and ...
- 2,556
2
votes
3
answers
1k
views
QGIS 2.14 Georeferencer Issue
Am having an issue with the QGIS Georeferencer - I start with a fresh canvas but for some reason, the points always end up shifting a great amount (see screenshot).
I've double checked my points, and ...
- 585
0
votes
1
answer
1k
views
Transforming a raster .png image to vector file
I have been working with FEMA flood maps to georeferenced and then digitize the maps by hand drawing polygons of the flood zone features. I have tried some workarounds to make the digitization process ...
CommunityBot
- 1
1
vote
1
answer
615
views
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 ...
CommunityBot
- 1
0
votes
1
answer
720
views
GeoServer - How to display Ortho ortho (JP2 file) when georeference of each file are located in jgw file
I wouldlike to create a layer with all my tiles of ortho (jpeg2000). The problem here is the georeference of each jpeg2000 file are in .jgw file. When I try to add this on geoserver, I have always the ...
CommunityBot
- 1
2
votes
1
answer
1k
views
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 ...
CommunityBot
- 1
0
votes
0
answers
51
views
Automatic georeferencing and recording color in Python
I am trying to stitch together FCDO country maps (JPEG) into a single world map while retaining the exact coloring of the zones. The maps are always tricolor (red, yellow, green) such as this map of ...
- 20.3k
1
vote
1
answer
516
views
Georeference DXF file which doesn't have a SRS assigned
I have a DXF file which I converted from DWG (CAD) file. I convert it GeoJSON using ogr2ogr but the output coordinates are out range of WGS 84. I think it's been assigned with the random coordinates.
...
CommunityBot
- 1
2
votes
3
answers
2k
views
Changing output file type in QGIS georeferencer
I have successfully georeferenced a raster file via the Georeferencer plugin (Georeferencer GDAL Version 3.1.9) in QGIS 1.7.0.
However, I noticed that the output georeferenced raster file is in TIFF ...
- 65.4k
1
vote
1
answer
647
views
Align set of satellite images
I have a problem my set of four satellite images (4 different years of observations) of the same area are not aligned and more than that I see that there is a distortion problem also.
I found this ...
CommunityBot
- 1
1
vote
0
answers
34
views
Batch georeferencing of aerial imagery above the ocean using R
I am working with aerial imagery collected above open water. The raw images are not georeferenced. I am using the closest position recorded by the aircraft (based on timestamps) as the coordinate for ...
- 111
9
votes
2
answers
12k
views
How to add geospatial info to an existing PDF?
I work with a small non-profit mountain bike trail advocacy organizationand as a result have created a number of PDF-based maps. These are all Mercator projection, built off of OpenStreetMap data, and ...
- 78k
0
votes
1
answer
732
views
Georeferencing multiple "slightly" overlapping drone orthomosaics
Situation:
I collected around 2000 drone images over 200 ha. My computer does not have the resources to render one large orthomosaic at once, so I decided to split my dataset into 8 and produce 8 ...
CommunityBot
- 1
1
vote
0
answers
37
views
How to use laspy to shift a las file that's been wrongly georeferenced?
I found an answer that uses lastools, but unfortunately, I use a MacOS laptop, so using lastools which has its binaries in .exe format cannot be executed without some other extensions.
I'd like to ...
- 65.4k
0
votes
0
answers
26
views
QGIS raster georeferencing. Is it possible to get a table with a coordinate and a pixel corresponding to it on the ORIGINAL raster?
I have an image of some area (raster) and I need to, knowing coordinate, get pixel on that raster. But if I will use raster georeferencig, I'll get a distorted GeoTIFF. Can I get this data from ...
- 20.3k
2
votes
1
answer
569
views
Could not create print device error when exporting georeferenced PDF QGIS 3.16.5
I am having an issue exporting a georeferenced PDF using QGIS version 3.16.5. So far the google search to fix the problem has not been successful. Using on Windows 10 64 bit. I have a limited ...
CommunityBot
- 1
1
vote
0
answers
46
views
GDAL - From jp2 image with rpc file to Orthophoto geotiff and keep the image rotation
We are trying to convert a jp2 image with rpc to orthoPhoto geo tiff. We do the following process. The problem is that in the ortho.tiff file the image don't preserve it's rotation angle from the jp2 ...
- 65.4k
3
votes
1
answer
3k
views
Image Shifting After Georeferencing in ArcGIS Pro?
I am georeferencing images in ArcGIS Pro using control points. After I export the control points and save the image, it shifts downward and displays in a different location. Now when I open the image, ...
CommunityBot
- 1
0
votes
1
answer
108
views
Georeferencing a historical map -
I am georeferencing a historical map and then trying to harmonise it with polygons from another file. I am trying to think about the best way to do this with respect to setting control points.
To give ...
- 10.5k
0
votes
1
answer
58
views
Can't create GeoPDF in QGIS (MacOS)
I am trying to create a GeoPDF in QGIS (Project > Import/Export > Export map to PDF). I'd like to tick the box "Create geospatial pdf" but it is greyed out. Please assist, an ...
- 1
2
votes
1
answer
2k
views
QGIS 3.16 and 3.20 Georeferencer freeze issue
Has anyone across the geo-referencer freezing on 3.16 LRE and 3.20? I have tried this with multiple different jpegs and tiffs. The progress indication bar sticks on 0% and the only way to resolve this ...
- 1
6
votes
5
answers
4k
views
Re-scaling and moving vector layer manually in QGIS
I have imported a DXF file (site layout drawings for proposed development), but its scaling is too small and it does not line up with the Google street maps. I want to re-scale the layer manually ...
- 1
0
votes
0
answers
42
views
Adjust GeoTIFF in QGIS Georeferencer
I have 600 GeoTIFFs, old maps, that are roughly rectified by the map corners. I want to improve them with more GCPs so that the internal scale that differs a bit gets more correct.
Is there a way to ...
- 20.3k
1
vote
1
answer
67
views
QGIS georeferencer vector snapping
In QGIS, when georeferencing vector files, is it possible to enable snapping that works within the georeferencer window ? Snapping works when choosing coordinates from the map canvas, but doesn't ...
- 2,556
1
vote
2
answers
290
views
QGIS - Serious loss of resolution when georeferencing
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 ...
- 6,417
0
votes
1
answer
60
views
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 ...
- 151
2
votes
1
answer
173
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 ...
- 20.3k
0
votes
2
answers
2k
views
Red lines appearing in QGIS Georeferencing?
I am georeferencing some old aerial pictures in QGIS. The area encompass mountains, hills and a flat area.
For some pictures the error is quite low and I am satisfied with the overlapping (error is ...
- 83.2k
0
votes
1
answer
208
views
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 ...
- 185
0
votes
0
answers
52
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 ...
- 65.4k
5
votes
1
answer
268
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 ...
- 69.1k
0
votes
0
answers
46
views
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 ...
- 1
3
votes
2
answers
4k
views
Creating a GCP (*.points) file from a Shapefile (points layer)?
I have created a points layer which represent Ground Control Points (GCP) for georeferencing scanned topographic maps via 'Add Layer > Add Delimited Text Layer', where I saved coordinates in a .csv ...
-1
votes
1
answer
57
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 ...
- 146
12
votes
5
answers
16k
views
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 ...
- 3,349
0
votes
1
answer
503
views
Rotating PDF/raster in QGIS 2
In QGIS 2.14.0-Essen I inserted a PDF (image) in my work.
But the PDF is rotated 180 degrees...
My objective is to georeferencing it.
How can I rotate it prior to georeferencing it?
- 34.1k
0
votes
1
answer
78
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 ...
- 146