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Geographic Information Systems

Questions tagged [georeferencing]

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

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48 views

Shapefile appears correct on QGIS, but wrong on Google Earth

I've created a shapefile on QGIS, drawing over a raster that I've just georeferenced. The raster is a map with UTM lines drawn every 50 meters, so it was easy to georeference. Moving the mouse over it ...
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14 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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27 views

Using gdal_translate with a high number of gcp

I've a CSV file witch describes the coordinates of each pixels in a image, it is structured like this: xcoord,ycoord,row,col 716657.6518375501,4784215.095395751,0,0 716657.6915582813,4784215....
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1answer
43 views

Problematic file size after georeferencing in QGIS

I have to georeference a few hundred JPEG maps in QGIS. Each of these maps has an average size of 20 MB. After georeferencing, these maps must be loaded into ArcGIS on another computer, of course ...
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72 views

How to georeference this image?

I need to georeference this .tiff. I see coordinate values ranging South-North 550000-554000 and West-East 10000-12000. Do I need to know the coordinate system to georeference the image ?
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70 views

Georeferencing DWG using QGIS?

I am using QGIS 3.4.11 on Windows 10 x64. I have three large DWG files that are the output of a survey (each roughly 5MB). No problem to import them into QGIS as geopackages using the built in DXF/...
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1answer
50 views

Raster TIFF file does not project onto QGIS basemap correctly

Forgive me if this is a simple fix, I am new to QGIS 3.8. I have a .tif file that when opened into QGIS is projected on the (0,0) lat/long coordinate of the base map and is very small. I have ...
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23 views

Recognized, calibrated test points for a rangefinding function?

I'm trying to find out if there are scientifically accepted calibration points to measure the effectiveness of a geodetic distance finding function. So far I've been using the listed latitude / ...
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1answer
31 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
44 views

QGIS georeferencing plugin workaround

I need to georeference an image. I had QGIS 3.2 installed. When I clicked on "Plugins -> Manage and Install Plugins" QGIS froze. So, I tried installing 3.8 and the same things happened. Tried 3.4, ...
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56 views

QGIS Raster Georeferencer adds black padding to corners of adjusted black and white TIFF image

After georeferencing a black and white TIFF image, the QGIS Raster Georeferencer fills the corners with black pixels, creating black elongated triangles along the edges of the new image. I could not ...
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45 views

Getting complex CAD drawing to right location in QGIS?

I have a complex CAD drawing from a city with many layers..hatches, points, poliylines..and I need it to georeference because when I import the DWG file into QGIS it turns out to be at the wrong place....
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1answer
63 views

Georeferencing a numpy tensor (spatio-temporal data)

I have a CSV file in which each row represents a record of an event with the following columns: latitude, longitude, time I want to build a numpy tensor with n x m x 8760 (hours in a year) ...
2
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1answer
51 views

Identifying coordinate system of historical map for Arctic Ocean?

I have a historical map (Arctic Ocean) with unknown CRS system. In order to compare it with my results, I have to merge them somehow. Could someone suggest the closest possible coordinate ...
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11 views

Image error polynominal transfomation

I'm georeferencing a Landsat 8 oli no QGIS trip. I include the control points and the system calculates the residuals for each point. At the end it indicates the polynominal mean error of the ...
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22 views

Adding additional points to GCP table after an image has been georeferenced

I have finished georeferencing an image with no attached coordinate system. I was unsatisfied as the image was not accurately overlayed on the map. The dx/dy & Residual error values are not ...
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1answer
89 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 ...
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2answers
49 views

CRS for old Falklands maps in QGIS?

Does anybody know which CRS should be selected when georeferencing a Falklands map made in 1961? The map itself says only: Grid: UTM Zone 21 Projection: Transverse Mercator Spheroid: International ...
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1answer
97 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 ...
2
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1answer
44 views

QGIS: Georeferencing a scanned map with known LCC projection and lat/long grid

I looking for advice or recommanded methods to georeference scanned maps for which I know the projection and some coordinates with lat/long dat in degrees In my test case, projection is: lcc: ...
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27 views

Importing an image to QGIS with no coordinates, only a scale of the drawing

Is it possible to import a drawining into QGIS without having any coordinates or CRS. The scale that I have is 1:1250.
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1answer
28 views

QGIS georeferencer distorting colours?

I try to use the georeferencer to geofreference certain building plans, but the referencer really distorts colours: As you can see in the picture. it hollows out what used to be solid red, black and ...
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1answer
75 views

Get Row/Column of Latitude/Longitude

I downloaded Sentinel-2 Imagery from AWS & I'm using rasterio to read/manipulate the data. I want to find the row/column coordinate of a latitude/longitude point that I initially used to search ...
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147 views

Georeference an unreferenced image using rasterio in Python

I have unregistered/unreferenced 6 band TIFF images that I have been trying to export as georeferenced GeoTIFFs. The GPS coordinates of the corners of each image is known and each image is 1024 height ...
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35 views

Error georefencing an aerial image with QGIS (for relatively small area)

I have an aerial image (.jpg format) of a relatively small site and have been trying to georeference it and generate a corresponding .tif file. I followed several online tutorials, but I keep getting ...
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18 views

Georeferencer stopped working

I georeferenced some things about a month ago no problem. However now when I click my reference plugin it does not open the Georeferencer dialogue box or the georeference drop down menu. It is enabled ...
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2answers
41 views

Georeferencing screen shot of Bing imagery in ArcMap?

I've been using the world imagery layer in ArcMap for hand-digitizing possible restoration sites. This has generally been adequate except for a few instances in which the imagery is a bit old and ...
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1answer
55 views

Using QGIS to Make Poster Maps? [closed]

I am very new to GIS and am trying to use QGIS 2.8 to make a very large display map of Southern Ontario, roughly 4 feet by 8 feet. I would like to use aerial imagery, and am thinking of using the Bing ...
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1answer
93 views

Georeferencing RasterLayer using ArcObjects?

I have a raster derived from a .png which has been drawn into a geodatabase. I also have the spatial reference and extent coordinates where I want to georeference the raster. Is there a way to ...
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1answer
21 views

Rotating around arbitrary point, not center when using Google Earth Pro to Edit Image Overlay?

In Google Earth Pro "Edit Image Overlay", we can rotate the overlay around its center (via grabbing the green diamond,) but how might one rotate it around an arbitrary point not its center? (Yes, ...
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1answer
76 views

Enlarging/shrinking while maintaining aspect ratio when using Google Earth Pro to Edit Image Overlay?

In Google Earth Pro "Edit Image Overlay", the only way I have found to enlarge or shrink the overlay while maintaining the X:Y aspect ratio is to grab one of the four green corners (not the four ...
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11 views

Menu bar locked to georeferencer options in QGIS 3.4.5 on Mac

After launching georeferencer the contextual menu bar on mac becomes locked to the georeferencer menu options irrespective of whether the window is the active window or docked. Closing georeferencer ...
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27 views

Projecting SAR GeoTIFF in azimuth & slant range coordinates

I'm newish to SAR imagery. We have SAR imagery generated from an airborne SAR platform that we are sharing with partners. We have been feeding them geotiffs of the imagery in WGS84 and EPSG:3857 for ...
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13 views

Retaining georeferencing information from CAD when opening in another mxd?

I georeferenced about 150 CADs, updating the georeferencing as I work. I created a new mxd using the same base layers and added one of the CADs that was georeferenced but it did not retain the ...
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76 views

Georeferncing issue QGIS 3.6 [closed]

I'm trying to georeference a GE satellite image and I've got the below problem. What I am doing wrong? I want it as same as a square polygon to start mapping.
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31 views

Photoshop JPEG won’t open in QGIS

I have scanned old map (no grid ref etc) and then assembled high res JPEG in Photoshop (but obviously could save in other file format, e.g., TIFF) I am now trying to georeference in QGIS 3 but on ...
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1answer
56 views

QGIS geo referencing - black background transparency

I georeferenced a raster file and ended up with a black background (exact 000000) The raster file contains a lot of black, so setting black to be a transparent color is not a good solution since I ...
2
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2answers
158 views

Compressing georeferenced images

I have a bunch of georeferenced TIFF images created in QGIS. The person creating them saved them as uncompressed (around 1 GB each). I would like to compress them as LZW to save space. How can I do ...
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25 views

Any plugin for converting web-based satellite imagery into ArcMap

I recently lost an Add-In toolbar that displayed imagery in ArcMap where I could assign projection to the data frame and my drawings on the satellite images would be "accurate" (vs drawing in a WGS ...
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0answers
93 views

Georeferencing multiple images as GeoTIFF (same size and extents) in QGIS

I have 50 images and I want to georeference them all on to the exactly same place. They have all the exactly same size and extends. I've begun to load the same georeferencing points for every single ...
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1answer
109 views

Importing animated GIFs in QGIS

Is it possible to import a animated GIF into QGIS? And is it also possible to georeference it, to have it on the right place?
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1answer
74 views

Geo-referencing historical topographical in ArcMap using the original grid

I am trying to geo-reference a series of maps of the German Military service in ArcMap or ArcGIS Pro using the coordinate grid (in red) provided by the German Military during the WWII. The attached ...
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26 views

Updating Georeferenced Imagery?

I created a photomerged aerial image in Photoshop and i need to update a small section but, don't want to georeference the entire thing all over again. How can i replace the imagery? I am not ...
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1answer
37 views

Loading georeferenced map TIFF image into shapefile using ArcMap?

I need to add this Lake County townships map into a shapefile that contains other counties' townships. The shapefile's fields are: Township, Shape, Shape_Length, Shape_Area and County. How can I do ...
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1answer
89 views

Georeference an image by knowing two Lat/Long coordinates?

How can I georeference an unrotated image by knowing two Lat/Lng coordinates? I tried to transform the coordinates to UTM, but this didn't work (for me), because I also need to rotate it and ...
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0answers
82 views

How to georeference point cloud data that was no spatial information?

I'm working on a project right now that the final goal is to compare two DTMs of a glacier surface from different years to visualize the change over time of the glacial surface. The first DTM was ...
2
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1answer
63 views

GDALwarp HDF5 Image With Unknown Projection

I have a NetCDF file that contains a series of HDF5 bands. I am looking to project one of these bands contained within this file. I've attempted to use the following command to achieve this: gdalwarp ...
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1answer
100 views

Control Points Disappear from ArcMap Link Table

I georeferenced a scan map and updated my georeferencing after adding the control points. But after I started digitising, and saving edits, I soon realised that when I open the link table on the ...
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2answers
209 views

Importing a georeferenced DWG/ DXF into QGIS

I work in an ecological consultancy and we would save money on mapping tiles if we could import DWG files into QGIS, they must be georeferenced however as we need to draw on various habitats ...
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15 views

How to check the distortion of an image that has been taken from a drone in order to georeference it?

Is it possible to check if my video, taken from a dji phantom 4 advanced has the fisheye effect? I want to georeference multiple same frames, so i wonder if i have to correct the distortions first. ...

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