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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votes
2answers
780 views

Georeferencing in R Based on the Four Corners

I have a raster image (photograph) that was taken from a helicopter. Along with that raster image, the system also tells me the positions of the four corners of the image in a different file. I have ...
7
votes
1answer
317 views

Opening MOD17A3 in ENVI so it is properly georeferenced?

I am using ENVI 5.1 on Windows 8. I am trying to open a MOD17A3 (MODIS Net Primary Productivity standard product - L4) .hdf file which I downloaded from the USGS website. I am still a beginner at ENVI,...
2
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2answers
40 views

QGIS Raster Georeferencer adds black padding to corners of adjusted black and white TIFF image

After georeferencing a black and white TIFF image, the QGIS Raster Georeferencer fills the corners with black pixels, creating black elongated triangles along the edges of the new image. I could not ...
2
votes
1answer
46 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) ...
0
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0answers
37 views

Getting complex CAD drawing to right location in QGIS?

I have a complex CAD drawing from a city with many layers..hatches, points, poliylines..and I need it to georeference because when I import the DWG file into QGIS it turns out to be at the wrong place....
0
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1answer
89 views

.Tif to .GeoTiff Scaling issue using GDAL

I was trying to georeference a .tif file generated from a matplotlib output using GDAL's python bindings and it seems to be off-scale. My objective was to create a geotiff file from the output of a ...
2
votes
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 ...
0
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1answer
87 views

Identifying coordinate system of Wetterzentrale maps?

I'm trying to georeference two maps from wetterzentrale in ArcGIS Desktop. In what coordinate system are those maps created?
1
vote
1answer
54 views

Loading and georeferencing historic maps using QGIS?

I have recently started working with QGIS. I am unsure of how to go about inserting historical maps which have no referencing data. I think it might be possible to insert them, then move and scale ...
1
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0answers
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 ...
2
votes
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 ...
0
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1answer
56 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 ...
0
votes
1answer
66 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 ...
0
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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 ...
2
votes
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: ...
1
vote
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 ...
1
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0answers
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.
0
votes
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 ...
0
votes
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 ...
2
votes
2answers
2k views

Georeferencing png using gdal?

I have created my own fantasy map, I have the map in a full size png and the map broken down into tiles ( with no geo data ) I installed MS4W and tried to use it to get the georeference data put is ...
1
vote
1answer
198 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 ...
5
votes
2answers
2k views

Seeking QGIS affine equation?

I am at the mercy of a govt authority who have provided utility information in a cad format with a 0,0 origin and a nonsense grid. About a dozen files, the grid and origin are entirely arbitrary. To ...
1
vote
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 ...
1
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0answers
50 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 ...
1
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0answers
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 ...
1
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0answers
17 views

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 ...
0
votes
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
votes
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 ...
38
votes
5answers
32k views

How to determine if a tiff is georeferenced or not?

I received a tiff file from someone, but I'm not sure if it's georeferenced. Is there an easy way to check this?
1
vote
1answer
41 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 ...
3
votes
1answer
246 views

Join .csv file and .shp of georeferenced points

I have georeferenced a map and saved a selection of some points on the map. These points are cities of departure and arrival and I want to join the .shp with a and excel .csv with the information of ...
1
vote
1answer
33 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'...
0
votes
1answer
39 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 ...
0
votes
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, ...
3
votes
1answer
1k views

Georeference image is mirrored

I'm working with QGIS and I'm trying to geo-reference a tobin lease map. The map datum: NAD27, projection: UTM Zone 14N. The process to georeference is fairly straight forward but the results I'm ...
8
votes
2answers
12k views

How to generate world files for raster X?

Given a list of georeferenced rasters, about a hundred, what is the simplest method to generate world files for each? In this case the source rasters are either geotiff with embedded georeferencing ...
1
vote
1answer
170 views

Import GDAL_TRANSLATE IMAGE GOES-13

I have this questions, how to Import by GDAL_TRANSLATE IMAGE GOES-13? Whats is possible projection? Files: 1501201445G13I01.TIF Size is 14400, 12001 Coordinate System is `' Metadata: ...
0
votes
0answers
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 ...
0
votes
2answers
67 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 ...
0
votes
0answers
24 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 ...
0
votes
1answer
104 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 ...
0
votes
0answers
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 ...
0
votes
1answer
72 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 ...
1
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0answers
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.
1
vote
0answers
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 ...
2
votes
1answer
197 views

Georeferencing X Y (AND Z) with GCPs in QGIS

I have GCPs recorded to centimeter precision in lat, long, and elevation. I want to georeference my UAV-photogrammetry-generated GeoTIFF and DEM with these GCPs (since the GPS on my UAV is only ...
0
votes
1answer
64 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 ...
2
votes
2answers
13k views

I want to georeference jpg map without any digitizing data

I have only a jpg map but don't have any digital data for georeferencing that jpg. So is there any way for georeferencing my map (like googlemaps)?
2
votes
2answers
289 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 ...
2
votes
1answer
777 views

Image Shifting After Georeferencing in ArcGIS Pro?

I am georeferencing images in ArcGIS Pro using control points. After I export the control points and save the image, it shifts downward and displays in a different location. Now when I open the image, ...