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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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20 views

Get positioning data from a GeoTIFF to use with other image

In my QGIS project there is a georegistered TIFF. I have an identically-sized TIFF that is not georeferenced that I'd like to appear at the same coordinates in my map as the GeoTIFF, perfectly ...
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1answer
35 views

How to create 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 ...
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19 views

Quantifying error on georeferenced aerial imagery

I georeferenced historical aerial imagery of a coastal area to estimate the size of oil sheens on the surface of the ocean. The control points I used were on land (street intersections, buildings, etc....
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1answer
46 views

Georeference plugin Qgis 3.x not working

I cannot open the Georeferencer in both Qgis 3.0.2 Girona and 3.2.3 Bonn. The plugin worked fine in both 3.x versions until today. It still work in version 2.18.24. It doesn't seem to open any ...
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22 views

Different methods to reduce georeferenced Imagery size

I have geo-referenced imagery with a size of around 7GB. When I apply GDAL Leaflet compression on the imagery, the size is reduced to 400MB. I have to generate tiles from this geo-referenced imagery. ...
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24 views

Automatically Recognised Targets for Combined Laser Scanning and Photogrammetry

I'm currently performing an engineering honours thesis on terrestrial photogrammetry and laser scanning in Archaeology. Both methods will be used to document a single location first and analysis will ...
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25 views

Falsely referenced Geotif (UTM30 with leading number in coordinates) - which EPSG or workaround?

I just got a bunch of old raster-datasets which I have to rework and put into a "presentable" state. For most of them no problem, but one dataset seems to be wrongly referenced - or better: I don't ...
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2answers
21 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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Shapefiles moving away from expected location in ArcMap? [duplicate]

I am using ArcMap. I have a satellite image of my school. Someone sent me some shapefiles(road, buildings) he has extracted from the same satellite image(he has a copy).then I imported the ...
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1answer
56 views

Georeferencing Old German Map in ArcMap that uses Ferro Meridian and very uncommon projection

I am trying to georeference an old map of the German Reich from 1930's. The map is based on the topographische Übersichtskarte des Deutschen Reiches 1:200000. The coordinates depicted on the map, ...
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16 views

Georeferencing Vector File using QGIS? [duplicate]

I am using QGIS 3.2.3. I have extracted a contour layer from a PDF file and saved it as a shapefile as individual lines (using Canvas). There is no projection information associated with the data. I'...
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27 views

Extremely Laggy whenever I start georeferencing TIFF Image on ArcMap 10.6

I have been running my ArcMap on my new work computer for a month or so, it went fine. But since last week, ArcMap becomes slower whenever I load the map/georeferencing, these days when I georeference ...
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2answers
51 views

Georeferencing map in QGIS?

I am trying to georeference my map, But I am unsure how can I rotate my image so that I can find GCP points easily from map canvas. In this image North is clearly visible. Using qgis 3.0.
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2answers
57 views

Georeferencing a raster with known Lon/Lat center coordinate

I would like to digitize a scanned map, see example below. The projection and datum information is available on the map. I am familiar with georeferencing of a scanned image that contains multiple ...
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13 views

Raster does not show up after adding in Freehand raster georeferencer

I have a large orthophoto that shows up fine when dragged into QGIS 3.0.1. I am using ESPG 32610, and my basemap layer (also a raster) shows up fine. I wanted to play with the Freehand raster ...
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20 views

County level georeference verification

I want to identify records that have been erroneously georeferenced outside of the county provided. I have a CSV of data that includes country, state, county names, latitude and longitude. I have a ...
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14 views

Combining a set of unreferenced TIFF rasters with metadata in separate file - QGIS3 [duplicate]

I have a set of 50 TIFF rasters from an aerial survey that I would like to use to create a continuous map. Each raster is large- ~100mb. The images are not a true grid, and there is overlap between ...
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1answer
76 views

How to obtain TIFF file using data from CSV files

I have a set of CSV files containing lat-long values for certain land cover classes. Long Lat 80.1 23.0 80.2 23.1 80.3 23.2 80.4 23.3 ... From this point on, I need to generate a TIFF file ...
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1answer
36 views

Why doesn't QGIS georeferencer support gdal scripting for projective transformation?

I am georeferencing drone images with QGIS, and the transformation method that gives the best results is the projective one. As I have many images, I would like to write a gdal script to automate the ...
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1answer
44 views

coordinates of objects from geo-tagged images

I have geo-tagged images (i.e have the latitude and longitude from where the images were taken) from a truck every 20 feet. I am trying to understand if it is possible to extract the latitude and ...
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51 views

Georeference problem

I have a raster in the CRS 21781, that is correct (on the fly). When I try to convert it into the CRS 2056, to make after some operation, qgis displace the raster somewhere else. I ran this on qgis ...
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18 views

How to use Raster Bender plugin in QGIS 2.18?

I have a distorted raster of a historic map that I need to warp to match the modern map. I've installed the plugin Raster Blender, but I can't work out how to use it, and can find no instructions ...
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1answer
74 views

Highlighting an area of a map

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, ...
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1answer
28 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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32 views

Georeferenced map displaying garbled image in QGIS

I am trying to georeference an image of a geologic map. I'm using the georeferencer plugin on QGIS 3.0. The map seems to project to the right place, but the image of the map is just a bunch of ...
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1answer
128 views

Disappearing map image when georeferencing in ArcGIS 10.6 desktop

I am trying to add an un-georeferenced map into ArcMap as raster so that I can manually georeference it, then use it as a base to draw polygon features on top of it. I can add in the image and ...
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0answers
56 views

Spatially referencing shapefiles in ArcGIS Desktop?

I have started making a map from an un-georeferenced image. I have created a number of shapefiles (each of which I have put in the correct coordinate system). I have now found some reference points - ...
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16 views

Adding spatial reference to nc file?

I want to add spatial reference to a nc file. I created a raster dataset (in tiff format) from that data, but the only thing I know about it is the cell size is 2 km. Below is the properties ...
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3answers
64 views

Georeference old historic maps of Africa in ArcGIS 10

I have a couple of historical maps of Africa which need to be georeferenced. There are latitude and longitude information on the map and now my question is may I use wgs84 in order to georeference ...
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2answers
91 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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0answers
33 views

QGIS georeferencer loses GeoTIFF attributes?

I used the georeferencer with QGIS 3.2 and I imported an image with the following EXIFS ExifTool Version Number : 11.09 File Name : Directory : ...
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1answer
36 views

Importing CSV matrix of z values to raster with no x y coordinates using ArcGIS Desktop?

I have a CSV file of depth values that have no spatial information. I know the "cell size" of the data but not where it should be put in space. How do I convert this into a data format, such as tif, ...
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34 views

Georeferencer in graphical modeler QGIS

Is it possible to automate georeferencing in graphical modeler, I want to extract images from a site and georeference them with QGIS. Graphical modeler algorithms won't show Georeferencer.
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16 views

Georeferenced Depth Profiles in 3D

I am a Geophysicist. We often create 2D deptth profiles like so https://www.google.com/search?q=ERT+profile&safe=off&client=firefox-b-ab&source=lnms&tbm=isch&sa=X&ved=...
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1answer
32 views

Recurring system crash while using GDAL Georeferencer in QGIS 2.18

I am currently working on aerial images I have to reference in QGIS. I usually use the GDAL tool for that, but during the last days, QGIS crashes all few minutes whenever I use it. I ran into this ...
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1answer
65 views

Georeferencing metadata in GeoTIFF files

I am generating maps as TIFFs using the raster package (writeRaster) in R to generate small tiles, then as a final step, combining the tiles via the GDAL script gdal_merge.py. I thought the resulting ...
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0answers
29 views

How to georeference multispectral raster without loss of data

I am trying to align two rasters made of data captured during same flight, but with separate cameras (drone - onboard, and Micasense RedEdge) and two separate gps devices (drone and another one ...
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1answer
17 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
72 views

What Python libraries can I use to georeference standard MODIS products?

I want to create georeferenced standard Swath MODIS products (for example, MOD02QKM hdf files) using Python. What Python libraries can do this?
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54 views

Fixing incorrect raster extent?

I have georeferenced rasters in ArcGIS based on a raster with the wrong extent. As a result, not only is the extent much larger than it should but the cell size is 100x greater, though the coordinate ...
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0answers
83 views

Georeferencing lat/lon .png map and adding grid using lat/lon

I'm trying to input a .png map into my QGIS project for a small area in South Africa. I don't know the CRS used to create the map but it has a grid system on it with the lat/lon labelled (created ...
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1answer
90 views

Rotating and scaling raster without distortion using QGIS?

I have some low-quality vector data and I'm trying to align some higher-quality raster images with it so that I can improve the vectors. Unfortunately the rasters have no control points or coordinates,...
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0answers
64 views

Adjusting georeferencing of GeoTIFF?

I have three thermal IR images of a boat acquired by a drone as it flew overhead. The images were taken at one second intervals, are GeoTIFF files and overlap one another. I don't know exactly how the ...
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0answers
49 views

Getting wrong scale on georeferenced TIFF in QGIS?

I just georeferenced a map of Iceland using the ISN93 coordinate system. It looks like it was successful since when I transform some random coordinates to WGS84 and compare them to Google Maps it does ...
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1answer
46 views

GDAL-Georefrencing already Georefrenced single band Raster

I am trying to georeference already georeferenced single band raster data using GDAL with four GCP's. Input image is having Coordinate system GCS- WGS1984 (EPSG:4326). Following Command is run on ...
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0answers
41 views

How to convert an image file of lines into a lines shapefile in QGIS? [duplicate]

I need to convert the following image into a line .shp file. I can make the image into whatever type of image file it needs to be before converting. For context, I had started mapping an area by ...
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0answers
20 views

Image navigation/geolocation of geostationary MTSAT HRIT?

I am wondering if anyone has had any experience with image navigation of MTSAT HRIT images? My current workflow is: create geostationary scanning angle co-ordinates re-project to 0.025 degree ...
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0answers
27 views

Pixel Coordinate to latitude and longitude conversion [duplicate]

I have a map of part of Brazil. I want to find the latitude and longitude of some marked points on the map. Is there any way to find latitude and longitude of a point from its pixel coordinates given ...
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1answer
44 views

Colour-based shapefile generation from image [closed]

Suppose I want to extract the road network of Zambia, and I retrieved the following image: The conventional strategy would be to georeference it (e.g. using GDAL/QGIS) and then manually draw a line ...
2
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1answer
184 views

Georeference option not visible in QGIS 3.0 for French version

I am using QGIS 3.0 Girona Early Adopter Release. I used to use Raster-->Georeference--> ... to georeference images in QGIS 2.18 but now I can only see the interactive georeferencing option in my ...