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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27 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) ...
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1answer
47 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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0answers
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
55 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
48 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
63 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
37 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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25 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
24 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
52 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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48 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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32 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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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
38 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
48 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 ...
3
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1answer
78 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
19 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
38 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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23 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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71 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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30 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
38 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
130 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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22 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
52 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
84 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
73 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
63 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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67 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
52 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
72 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
108 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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1answer
60 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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0answers
88 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
42 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
32 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
79 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
166 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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146 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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148 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, ...
2
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2answers
181 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 ...
2
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1answer
44 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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0answers
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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1answer
59 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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