Questions tagged [georeferencing]
Aligning geographic data to a known coordinate system so it can be viewed, queried, and analyzed with other geographic data.
0
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1answer
11 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 ...
1
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0answers
21 views
How to scale up a reference image in QGIS?
I'm creating a fictional map and I've made a raster of it in Photoshop.
I've added the image by dragging and dropping it into the program. I also have an OSM layer as reference for the size I need my ...
0
votes
1answer
23 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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0answers
27 views
Overlay png image onto shapefile in QGIS? [on hold]
How can I overlay a png file onto a shapefile in QGIS? I loaded both into QGIS and then tried using the Georeferencer tool to assign coordinates on the png image but then I get stuck on overlaying the ...
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0answers
31 views
Transverse Mercator (TM) to Universal Transverse Mercator (UTM) [closed]
I am a new to QGIS.
How can I convert a Transverse Mercator (TM) raster image to Universal Transverse Mercator (UTM)?
The raster file that I used has a projection: Transverse Mercator (TM); WGS-84;...
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0answers
13 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.
...
0
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0answers
22 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 ...
2
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0answers
33 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&...
1
vote
1answer
33 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 ...
0
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1answer
20 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 ...
1
vote
1answer
46 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,...
1
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1answer
86 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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0answers
45 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/...
0
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0answers
58 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
votes
2answers
125 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
votes
1answer
39 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
18 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
37 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 ...
0
votes
1answer
30 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 ...
-2
votes
1answer
31 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
48 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
13 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
50 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 ...
1
vote
2answers
51 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 ...
2
votes
3answers
79 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
votes
2answers
112 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
votes
2answers
116 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 ...
-2
votes
1answer
81 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
votes
2answers
191 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 ...
2
votes
1answer
73 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 ...
0
votes
1answer
24 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/...
1
vote
1answer
145 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
25 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
votes
1answer
227 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
43 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. ...
1
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0answers
37 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 ...
0
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2answers
41 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
81 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, ...
0
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0answers
25 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
votes
0answers
32 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 ...
1
vote
2answers
94 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
votes
2answers
73 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 ...
2
votes
1answer
119 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 ...
1
vote
1answer
53 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
81 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 ...
0
votes
0answers
45 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
votes
1answer
98 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
votes
1answer
56 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 ...
1
vote
1answer
327 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 ...
0
votes
3answers
79 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 ...
