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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161 views

reproject *TO* MODIS sinusoidal grid

I want a global file chopped into multiple netcdf files corresponding to the modis tiles. I currently have a directory of GLOBAL netcdf files over time. NOTE: ERA interim data is on the regular lat/...
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179 views

Creating GeoTIFF from TIFF image?

I have a TIFF file that is 2880x1440 pixels. It is a global map in simple cylindrical projection (i.e., each pixel is a 1/8th degree square): If the uppermost leftmost pixel has coordinates x = 1, ...
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198 views

Georeferenced images not lining up correctly with one another in QGIS?

After georeferencing these 3 images onto my basemap (openstreetmap) they do not line up (see how the white lines are mismatching). Why is this the case and how can I solve this problem? I made sure ...
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45 views

What is happening different to my TIFF between export data and arcpy

I am working in FME with TIFFs downloaded from sentinel-1 (SAR). These TIFFs display correctly in ArcMap but in FME is loses its spatial reference and a bound box calculation gives the number of ...
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21 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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63 views

Seeking code sample or pointer showing how to calculate Corner Coordinates of JPG file based on EXIF GPS data? [closed]

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
41 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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33 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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171 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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17 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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139 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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103 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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319 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 ...
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171 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 ...
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137 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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1answer
87 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 ...
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235 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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1answer
124 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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1answer
49 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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1answer
346 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 ...
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27 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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511 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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58 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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73 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
113 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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36 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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38 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
141 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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107 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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1answer
239 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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96 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
154 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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64 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
142 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
116 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
595 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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3answers
87 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
310 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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82 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
63 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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42 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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1answer
73 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
218 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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77 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
35 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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176 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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184 views

Georeferencing lat/lon .png map and adding grid using lat/lon? [closed]

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
232 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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99 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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118 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 ...