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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16 views

How to get the georeferencing mean error?

I'm georeferencing pictures and want to see the error. When using the affine transformation the mean error is displayed in meters in the bottom right corner of the georeferencing window. For the ...
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1answer
31 views

Using ArcMap georeferencing in AutoCAD

I am working on a project in ArcMap. I added an auto cad .dwg to my map, and in ArcMap, and I Georeferenced this .dwg file. So now the DWG drawing is moved to be exactly on my drawing in ArcMap. I ...
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84 views

Georeference single drone image from EXIF data

Looking for an algorithm (python, formulas, whatever...) to georeference a single drone image based on its EXIF data. Specifically, I need to translate drone GPS latitude and longitude (after ...
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23 views

QGIS - CRS for a fictional planet map (raster) - What am I doing wrong?

I have a procedurally generated DEM heightmap (1600px * 800px) showing an entire (fictional) planet in equirectangular projection (= equidistant cylindrical) that I uploaded in a QGIS raster layer ...
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16 views

QGIS georeferencer's output incomplete

I am georeferencing some tiff images in QGIS using the same settings for the goereferencer's parameters. A couple of images were referenced fine but for others the georeferenced output raster is ...
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75 views

Georeferenced raster image not appearing on map in QGIS

I imported a PNG file into QGIS for georeferencing, and set it to add automatically to map after finishing the process. However, once its job was done and the new layer and joined my list panel on the ...
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1answer
346 views

How to determine if a .obj 3D Mesh file is geo-referenced or not?

I have a .obj file output from OpenDroneMap. But I cannot determine if it is geo-referenced or not. How can I determine that?
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25 views

Georeferencing a GeoTIFF using with RasterIO

I am trying to Co-register a raster using Ground Control Points w.r.t. another raster using RasterIO. I have written a PoC, but having a bit of difficulty in measuring the quality of the final ...
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1answer
160 views

Georeferencing NASA, NOAA, and Natural Earth Projections in QGIS

I'm new to QGIS. I'm currently using the newest version-- 3.10. I downloaded a raster projection (a tiff file) and vector data (SHP files of coastlines and rivers) from Natural Earth I to import as ...
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19 views

Display error when uploading images to google earth engine

I am adding square images (1024x1024 pixel, left image) from the xbd dataset (a disaster dataset comprising of satellite images) to the google earth engine. When displaying them they are shown as a ...
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1answer
19 views

Georeferencer Plugin: Installed but does not appear in raster menu (QGIS 10.3, Windows 10)

I see that others have had problems finding a rouge georeferencer window, or using the plugin. But when my student tries to use the confirmed installed georeferencer plugin in QGIS 3.10 on Windows 10 ...
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Lat Long and timestamp to hyperlink transect videos (YouTube)

I have a down looking GOPRO video of a shallow reef (from the surface) that has been synced with GPS point data (XY, Lat Longs) from the GPS track. Have uploaded a video to YouTube which has a "...
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1answer
66 views

Obtaining a transform for Affine transformation (Cartesian to geodetic coordinate system)

I have a Line, defined as 2 points in a Cartesian coordinate system. Shapely allows projecting this line with an affine transformation if a transform is specified. from shapely.geometry import ...
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How to calculate the accuracy of georeferenced aerial images in meters if the mean error is in pixels?

I have scanned aerial images taken shortly after WWII and have to georeference them and calculate the mean error. I use the Projective transformation so the error after transformation is shown in ...
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1answer
227 views

Define Proj4 string for CANGRD dataset

I'm trying to georeference the .grd files provided here http://open.canada.ca/data/en/dataset/3d4b68a5-13bc-48bb-ad10-801128aa6604. The documentation states "The CANGRD grid is in polar stereographic ...
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2answers
765 views

Calculate accuracy of georeferencing

I'm working on georeferencing old maps for archaeological purpose. Of course, colonial maps all do have some degree of transformation needed. But sometimes a specific region is well mapped while the ...
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19 views

How to improve the horizontal and absolute accuracy of UAV layer

I am working with two digital elevation model data sets: LiDar and UAV DEMs. Both flights were conducted in the same location along a coastal shoreline showing the intertidal area with lots of bare ...
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1answer
463 views

Differences between different georeferencing transformation algorithms in QGIS

Expanding on Transformation types in geo-referencing of QGIS?, I'm trying to understand the exact transformations used by QGIS, and how they differ. The georeferencer documentation is of course a good ...
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51 views

Which coordinate reference system should I use to have more precision while calculating polygon area? 4326 or convert to the one specific to my area?

We are saving our drawn polygons in our database with the coordinate system 4326. The polygons drawn are all in Spain (where I came to find out the adequate coordinate system for Spain is EPSG:2062). ...
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23 views

Georeferencing Tool in QGIS 3.1: Getting NULL Z-Value with DSM layer when 'rubber sheeting'

I am using the Georeferencing tool/plugin in QGIS 3.1 to try and 'rubber sheet' two layers together. My reference sheet is a LiDar data set (ESPG 2961- NAD 83), pixel size 0.0709, -0.0709. The sheet I ...
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Seeking iOS app to allow for drawing of shapefiles on georeferenced maps

I am wondering if it is possible for us to draw bird flight paths on a georeferenced map on iPad so that I don't have to use so much paper when I'm out in the field. I am hoping for something that ...
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Georeferenced map lines up better with different CRS – why?

I have an old map that I'm trying to georeference. The map says that it's a Bonne projection, with the origin at 34ºN, 130º,30'E. I downloaded a DEM (in WGS84), and reprojected it using a custom Bonne ...
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Fixing local orthorectification mismatches leading to small georeferencing errors?

My project uses good quality high resolution orthorectified imagery (from the government) as its reference base layer. I complement it for vegetation analysis with additional imagery from a different ...
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1answer
49 views

Conversion of MLS/AURA RELATIVE HUMIDITY PRODUCT to correctly referenced GeoTIFF

I have downloaded the following product https://cmr.earthdata.nasa.gov/search/concepts/C1251101764-GES_DISC.html and it gives me a .he5file. Can anyone help me in correctly geo-referencing the file ...
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1answer
70 views

Getting geo transforms (affine) without a TIFF reference image

I have a binary mask with buildings' footprints. What I have is a latitude and longitude of the center of my image and I want to georeference each polygon first. And here is what I have done before: ...
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89 views

Georeferencing CAD drawing and setting ground control points in GRASS?

I'm fairly new to QGIS and Grass GIS, and learning the interface. I have a CAD drawing that has no coordinate system assigned and needs to be georeferenced to NAD83 HARN Northern Colorado (feet). I'...
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1answer
77 views

Error with .jpeg in Georeferencer

QGIS error message when in Georeferencer: .jpg is not a supported raster data source. libjpeg: Bogus Huffman table definition How do I fix this? Tried different .jpeg and still doesn't work. Previous ...
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3answers
621 views

Georeferencing VNP46A1*.h5 Data

I'm trying to analyze nighttime lights of a specific area with VNP46A1 data. I got my data from this website, but I could find only few tutorial about this product, and one of them was ...
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21 views

QGIS georeference a Mesh layer with wind vectors?

I have an .nc file with u and v components to create a map of wind speed and direction. When I add the layer as a mesh in QGIS, I am able to get the arrow vectors correctly (image below), however, the ...
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1answer
37 views

Visually correcting systematic shift between two geodatasets using ArcMap

I often have two datasets that are obviously not georeferenced correctly. Most of the time a simple translation (shift by x/y) could fix this. Is there an easy way to do this e.g. by specifying one or ...
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2answers
130 views

Image disappearing when georeferencing google earth image?

I have downloaded an image from google earth with four control points ready to geo reference. I enter the first two points and everything is fine. Then I enter a third point, the image disappears and ...
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1answer
36 views

Exporting map to TIF with embedded georeference/World using QGIS

The Map export from the Project menu supports export to TIFF with the World file embedded. The Print Layout supports TIFF export with a separate World file. I need the embedded version. For automation,...
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62 views

Georeferencing with shapefile instead of raster image in QGIS

I have a geographic file (be it shapefile or otherwise) which is stretched and dislocated into the wrong projection space. So I'm wondering how to approximate its correct location by selecting points ...
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18 views

Using QGIS to extract elevations of specific points from a DEM layer

With QGIS My objective is to extract Elevation Values from a DEM dataset. The locations to extract elevations come from a segp1 file. My DEM values are georeferenced to a UTM, my segp1 is ...
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1answer
194 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 ...
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1answer
30 views

I have a DXF file that I need to attribute a map to, to locate it in QGIS

I have recieved a DWG file with no location information other than the parcel numbers. I was told to open it in QGIS (I have QGIS 3.14), install the plugin HCMGIS and open a Google Satellite BaseMap ...
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1answer
50 views

Qfield layers are not where they should be. CRS problem?

I have created a basic QGIS project with a basemap and a point layer saved with CRS OSGB 1936/British national grid. When uploaded to Qfield, my actual location and the layers I have uploaded don't ...
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1answer
55 views

Manually setting spatial extent of custom map in QGIS 3.14

Due to customization wishes I created a map in Adobe Illustrator which means my .tiff file has no metadata like CRS, extent etc. when I export it. To manually set the spatial extent I would need an ...
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1answer
31 views

Entering UTM Map Coordinates when georeferencing is not working

I'm trying to enter UTM map coordinates from a scanned image (grid), and I'm entering the coordinates correctly X/Y, but when I click to process the georeferencing - the image does not overlay where ...
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1answer
41 views

Georeferencing Himawari-8 images with Rasterio

I was pulling some Himawari-8 images from RAMMB here and wanted to geo-reference the high res 5500 x 5500 images. I found a related question and answer using GDAL here which does work fine but I was ...
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1answer
321 views

Georeferencing X Y (AND Z) with GCPs in QGIS

I have GCPs recorded to centimeter precision in lat, long, and elevation. I want to georeference my UAV-photogrammetry-generated GeoTIFF and DEM with these GCPs (since the GPS on my UAV is only ...
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23 views

Calculating inverse polynomial transforms for pixel sampling when map georeferencing

In map georeferencing, one typically chooses a set of ground control points that represent pixel locations in the map image along with their real world geographic coordinates, which are then used to ...
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27 views

QGIS Georeferencer Plugin missing compression parameters

I am trying to georeference a rather large PDF. I was successful in doing so without compression. However, when trying to make the map lighter, I added some compression. The options are: LWZ, PACKBITS,...
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70 views

Keep the map straight with arcgis projections

I need to overlap DEM file with an historical map. The historical map doesn't have georeferencing so I need to add some control points, but when I do this the map is distorted. There is a way to ...
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2answers
845 views

Unable to choose desired layer when georeferencing in ArcMap?

I am georeferencing some images in ArcMap 10.3.1. When I want to add the specific layer I'm going to georeference, I cannot choose this from the drop-down menu. Any ideas on how to solve this ...
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2answers
299 views

Changing transparency for black background when georeferencing raster

I georeferenced a raster file and ended up with black background (exact 000000) The raster file contains a lot of blacks, so setting black to be a transparent color is not a good solution since I ...
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1answer
43 views

Scaling georeferenced image to half of its size using QGIS

I want to rescale a georeferenced image half of its size using QGIS. I tried the Freehand georeferencing Plugin. It is not working properly i.e no option to enter scale factor(0.5). I want to do it as ...
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1answer
1k 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, ...
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1answer
36 views

Fixing a raster with unknown spatial reference so other rasters show up

I am trying to create a dataset with data from different raster datasets in ArcMap. One of the raster datasets seems to have an "unknown spatial reference", and it shows "unknown" as XY coordinate ...
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1k views

Getting EPS vector as georeferenced layer into QGIS

I have an eps-file with polygons of landuse. The file has coordinates to georeference it. I need to convert it into a geo vector. I could do the following steps: export/convert the eps to raster (...

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