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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6 views
Georeferenced Rasters from QGIS to ESRI: coordinate system problem
I have georeferenced rasters in QGIS (2.18). We assigned a coordinate system to the image: EPSG 26917, which is NAD83 Zone 17N. When i then bring this image into ESRI, the coordinate system is ...
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1answer
20 views
Seeking code sample or pointer showing how to calculate Corner Coordinates of JPG file based on EXIF GPS data? [on hold]
This is a follow up to this question:
Using GDAL to extract Corner Coordinates based on a jpg file's GPS EXIF data?
Per the answer I received to the above question, gdal_merge cannot merge JPG ...
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1answer
26 views
Projecting gtiff data using GDAL and Python?
I have a tile data and I would like to transform the data to a gtiff data with georeference information via gdal and python.
The tile is the quadtree tile with quad key 1321222320321122. The left ...
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1answer
26 views
Location of Georeferencer in QGIS Las Palmas [duplicate]
I can't find the georeferencer in qGIS las Palmas 2.18
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0answers
15 views
Transforming GRIB file into GeoTIFF that is correctly georeferenced using Python GDAL?
I am trying to transform a GRIB file into a GeoTIFF to be used in a ArcGIS, but am having trouble getting the image to display in the correct location. I have been able to create a GeoTIFF, using GDAL ...
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0answers
9 views
Georeference : Control Points Check Box
I was trying to georeference an image and wanted to uncheck (not delete) few control points. But the check box is which allows me to do so went invisible. Can someone please help in resolving the ...
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0answers
29 views
Preparing AutoCAD file for QGIS?
I have an AutoCAD file which i want to open in QGIS as a shapefile.
In QGIS the coordinate reference system is WGS84 EPSG:4326 but I do not know how to make my AutoCAD drawing in same coordinate ...
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2answers
36 views
Align unreferenced TIFF with GeoTIFF in QGIS
I'm working in QGIS. I have two TIFF files of the exact same dimensions, but one of them is georeferenced and the other isn't. I'd like to import the non-georeferenced file so that it aligns exactly ...
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3answers
58 views
Are Google satellite images precise enough for georeferencing?
I need to georeference historical aerial images (from 1976). There is no metadata, e.g. reference system, available. I thought I could use Google satellite to set ground control points for ...
3
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2answers
89 views
Why QGIS produces georeferenced TIFF files differing in size by two orders of magnitude on the basis of very similar JPEG maps?
I am using QGIS for vectorising some small-scale maps from a historical atlas. The maps are provided as JPEG images 3703 x 4718 ranging roughly from 5 to 9 MB in size. All georeferenced tiff images ...
2
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2answers
103 views
Producing offset after georeferencing Soviet topographical military maps from printed control point coordinates in QGIS
I have 'acquired' a collection of scans of (previously top-secret) Soviet-era military topographical maps at a set of 1:25.000. I want to georeference a set of these scans.
I know the coordinate ...
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0answers
41 views
Overlay layers with image JPEG
I am working with QGIS 3.4.
I need to compare a layer with elements from an image. My image is not georeferenced and too hard to georeference due to no specific structures, borders etc. So, ...
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1answer
76 views
How to trace a polygon from a search engine image?
I need to draw a polygon shape around Tobermory and Bunnehaven, (these are situated at the top of Figure 1 below. The issue I have with this image is that I am finding it hard to geo reference. As you ...
2
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2answers
169 views
What projection is used in Argentina cadastral maps from 1901?
I am looking to georeference and digitize the cadastral maps for Argentina from 1901 and I need some help in determining the projection which was used in the creation of this maps.
For more detailed ...
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0answers
60 views
QGIS Girona 3.0.3 : CSV File and Georeferencing
I installed version 3.0.3 because I have to give lessons on this version but I meet several bugs compared to version 2.18.
I would like to import a csv file. I do not have an error message but my ...
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0answers
19 views
Importing data or georeferencing images from online maps?
I would really like to add my own feature-classes over this racial dot map (for metro Atlanta), but I'm not even sure where to begin. I was thinking of taking a screenshot and georeferencing some ...
2
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1answer
47 views
Georeference a raster, CRS unknown but latitude and longitude grid is there
So, the situation involves :
QGIS 2.18 and georerencer plugin;
Downloaded TIF of an old canadian
topographical map from Quebec National Library and Archives
(permalink here) and as you can see, this ...
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0answers
36 views
Georeferenced image distorted after clipped by mask layer
I georeferenced some images (EPSG:25832) and then clipped the images by mask layer.
In QGIS the clipped ones show some distortion which is visible as white spots or missing raster information. The ...
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1answer
20 views
ArcGIS 10.5 - Testing the accuracy of a satellite image's georeferencing using dGPS ground control points
I want to test the accuracy of the georeferencing of a satellite image by using a set of independent ground control points collected in the field via differential GPS.
Is there a tool/method/...
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0answers
32 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 ...
1
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1answer
81 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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0answers
21 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....
2
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1answer
131 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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0answers
33 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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0answers
30 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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0answers
30 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
28 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 ...
3
votes
1answer
73 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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0answers
21 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'...
2
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0answers
28 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
77 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.
2
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2answers
66 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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0answers
21 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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0answers
23 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 ...
2
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1answer
90 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
42 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 ...
2
votes
1answer
55 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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0answers
25 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 ...
0
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1answer
93 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, ...
0
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1answer
36 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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0answers
35 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 ...
1
vote
1answer
209 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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3answers
72 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 ...
2
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2answers
133 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
38 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 :
...
1
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1answer
42 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, ...
0
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0answers
36 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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0answers
20 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
41 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 ...
