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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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Control Leaflet image overlay with multiple projection coordinates [on hold]

I see Leaflet image overlay only needs two coordinates to put a image on the map. I did so, but the image shifted from its real position. The image above georeferenced by multiple coordinates so that ...
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10 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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46 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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25 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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27 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 ...
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2answers
108 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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21 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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40 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
63 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
60 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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25 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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35 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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51 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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45 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 ...
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1answer
38 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
27 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
50 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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14 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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30 views

City Engine: Align Terrain to Shapes - Purpose?

What is the purpose of aligning the terrain to shapes, if I have already aligned my shapes to the terrain? In my understanding, the terrain is a reference surface, and therefore I wouldn't want to ...
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50 views

automatically georeference QgsGeometry.fromPoint features on creation

Is there a way to automatically georeference fromPoint features upon creation? I use this layer URI: self.pinLayer = QgsVectorLayer( "Point?crs=epsg:3857&field=id:integer&...
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1answer
40 views

Looking for a projection used for Nova Scotia in 1924

I have a map of Nova Scotia published by the Department of the Interior Canada in 1924 which I would like to georeference. The map has a graticule labeled with latitude and longitude. According to a ...
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1answer
24 views

QGIS Georeferencing - removing co-ord bubbles from .tiff file layer

I'm new to QGIS ... I've georeferenced a raster image using the georeferencing tool. That went well. However, when the new TIFF layer opened, it still had the yellow co-ord bubbles. How do I remove ...
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1answer
60 views

Find CRS/Projection that matches a map [duplicate]

I have been given some utility plant maps for a project my company is working on but they don't come with a projection listed (they are in PDF format, but I will strip them down, make them transparent,...
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1answer
123 views

QGIS 3.4.4 georeferencing issues

I have upgraded to QGIS 3.4.4 and using the georeferencer and there appears to be shift when zooming in and out of a georeferenced image (Transformation type is Helmert, Resampling Method is Linear ...
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96 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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97 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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2answers
146 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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1answer
43 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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20 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
42 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
31 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
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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88 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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14 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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71 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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66 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
116 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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2answers
138 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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2answers
125 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
82 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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2answers
214 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
92 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
34 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
229 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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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
312 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

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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43 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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2answers
54 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 ...