Questions tagged [ground-control]

Question 1

I am generating GeoTIFFs of sonar data. I am currently setting specific corner points using gcp options. This is all fine and works great. However, this really only works if the vehicle collecting the ...

Question 2

I have a function to convert the pixel values to the coordinates using the ground control points from the GeoTIFF file, which is given as below: import rasterio.control import rasterio.transform def ...

Question 3

I am georeferencing a historical map and then trying to harmonise it with polygons from another file. I am trying to think about the best way to do this with respect to setting control points. To give ...

Question 4

I have 600 GeoTIFFs, old maps, that are roughly rectified by the map corners. I want to improve them with more GCPs so that the internal scale that differs a bit gets more correct. Is there a way to ...

Question 5

Let's take a 6 x 6 mile US PLSS township, and house numbers 800 to a mile. Using gdaltransform, given the coordinates of each section corner as our ground control points (-gcp 4800 4800 lon lat for ...

Question 6

I have processed about 8 orthomosaics from UAV data collection. They used RTK for georeferencing, but I guess it was not done properly. They did not use GCPs. Therefore, the orthomosaics do not align. ...

Question 7

I'm using QGIS3 to try to georeference a screenshot of an old map of a state park (the PNG file) to a shapefile of the park's boundaries by matching points in the park's boundary. When I tell it to ...

Question 8

I am working with Sentinel-1 SAR images of a coastal area in ground range geometry (GRD product), which is defined by a geolocation grid of 10×21 ground control points. For further analysis, I need to ...

Question 9

I use CORS from TxDOT RTN to georeference DJI Phantom 4 RTK and Emlid Reach RS2. I have been using it in Corpus Christi, TX with no issues. I do Structure from Motion (SfM) in Metashape, verify the ...

Question 10

I have a *.tif, vintage aerial photo. Also, there is a metadata with coordinate information corresponding to the aerial photo. I would like to give that coordinate to the .tif. First of all, When I ...

Question 11

I am using ArcGIS Pro to perform an image classification. To do this I need training data polygons derived from the image which is being classified. I created training data polygons outlining features ...

Question 12

I have to geo-reference village maps(vector shapefiles) with the help of GCPs. In the transformation, the areas of the polygons need to match closely with their target values. Is there a QGIS plugin ...

Question 13

I have a block of code that applies GCPs I have calculated to spatially project an image. Essentially, I am projecting the image by defining the corners as points 1,2,3,4. # Set ground control points ...

Question 14

I am trying to make a 2D planer map of Mars, I have multiple non_georef images along with their geocentric lat and long. I am using gdal.GCP to georef these images; its working but something seems off ...

Question 15

My goal is to georeference a DEM tiff file that I have with a reference orthophoto. Steps to reproduce Open orthophoto (EPSG2056) in QGIS Open the DEM (EPSG2056) in the Georeferencer Add GCP (I am ...

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Questions tagged [ground-control]

Create a GeoTIFF (using gdal_translate) that accounts for "turns"

How to transfer the GeoTIFF coordinates to pixel values

Georeferencing a historical map -

Adjust GeoTIFF in QGIS Georeferencer

How to adjust gdaltransform ground control point weighting control?

How to align orthomosaics in QGIS?

QGIS3 georeferencing an unreferenced PNG and it isn't showing up on my base map

Using rasterio to rasterize vector data to a GCP referenced image

Error when using CORS from TxDOT RTN to georeference DJI Phantom 4 RTK and Emlid Reach RS2

How to give a coordinate to *.tif?

Georeferencing Polygon Features using ArcGIS Pro

Geo-reference vector data with GCP and target area

GDAL GCP Transform - No GeoTransform() on GCP projected image?

GeoReferencing Mars imageries

Problem with wrong DEM output after georeferencing

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