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4 votes

QGIS not loading jpg with coordinate information

If you run gdalinfo you'll notise that GDAL does recognize .jpgw as a World file. gdalinfo QAP27863800.JPG Driver: JPEG/JPEG JFIF Files: QAP27863800.JPG QAP27863800.jpgw Size is 3800, 4000 ...
user30184's user avatar
  • 66.8k
4 votes

Gdalwarp orthorectification WorldView-3 not using RPC projection properly

I finally managed to correctly orthorectify my image using Gdal 2.2.2. I am not 100% sure which made the difference, but there are two things that I did. Firstly I made sure that the DEM used has ...
David's user avatar
  • 131
4 votes
Accepted

Does GDALWARP have support for OpenCL speedup to orthorectification?

Unfortunately, it turns out at this time, GDAL does NOT support OPENCL speed up on orthorectification. In fact, the only speedup I have been able to find is that compiling with OpenCL does speed up ...
Skylion's user avatar
  • 529
4 votes
Accepted

Seeking references for how Rational Polynomial Coefficients(RPCs) are calculated

A RPC Model is nothing but a transformation between (PIXEL,SCAN) => (LAT , LON , HEIGHT) for any given satellite image. The concept of RPCs has recently picked up in the industry because of the ...
Radha Krishna's user avatar
4 votes

Performing aerial triangulation on scanned aerial photos without having surveyed ground control points (GCPs)?

In my work I encounter this situation often. The method that I use is next: Prepare the images in Photoshop: crop, contrast, brightness, whatever is needed to improved image quality. Also in ...
alecsx's user avatar
  • 618
4 votes

Orthorectifying aerial photos?

Orthorectification is the process of correcting aerial or orbital images for terrain geometry. The terrain geometry is given by a DEM (a DTM in the case of regular orthophotos, high-resolution DSM for ...
Roberto Ribeiro's user avatar
4 votes
Accepted

QGIS not loading jpg with coordinate information

According to the QImagery help-page, you should try EPSG:3857 (Pseudo Mercator). In addition you must tell QGIS which CRS to use. From the top menu, choose Settings – Options and the CRS-tab. Choose ...
9ls1's user avatar
  • 1,427
3 votes
Accepted

What is the official term for Photo Index?

To add to Erik's comment, I believe I've also heard it referred to as a "contact sheet". https://www.picturesandstories.com/news/2014/2/24/how-to-print-a-contact-sheet-of-photos-in-windows Also, ...
cm1's user avatar
  • 2,290
3 votes

Image orthorectification with XYZ and roll, pitch and yaw

You need additional parameters from the image acquisition process. Important are: sensor resolution which is the cellsize of the chip, the sensor area and the focal length. Normally you need ...
huckfinn's user avatar
  • 3,603
2 votes

Can't generate true orthophoto from my software

While I understand it is about pricing and the cost but have you looked at it here http://www.ips-match.com/ I myself have not tried this since I only use ERDAS or ENVI. You can try and google "...
PROBERT's user avatar
  • 4,139
2 votes

Which preprocessing comes first for pansharpened imagery- atmospheric correction or orthorectification?

In most processing chains, orthorectification or reprojection is performed as late as possible in the workflow, to avoid altering the spatial relationships between neighbouring pixels. In your case, ...
Benjamin's user avatar
  • 911
2 votes

metadata in Orfeo Toolbox Orthorectification

OTB do include test for support of WV3 geometry. I supposed that the format is pretty much the same as WV2 which explain why the process run without errors. Nevertheless there is still a bit of work ...
Manuel Grizonnet's user avatar
2 votes

Georeferencing batch geotagged photos

This will not help you in ArcMap but ArcGIS Pro (which is part of the ArcGIS Desktop license) will be worth investigating for Georeferencing a raster automatically to another raster: Auto ...
PolyGeo's user avatar
  • 65.2k
2 votes
Accepted

Where can I find GRASS i.ortho.rectify?

From https://trac.osgeo.org/grass/browser/grass/branches/releasebranch_7_2/imagery/i.ortho.photo/README?rev=69510 : STATUS: The i.ortho.photo suite of modules has been temporarily disabled ...
AndreJ's user avatar
  • 76.7k
2 votes

Finding tie points between a georeferenced and a non geo referenced image

I came across AROSICS, or An Automated and Robust Open-Source Image Co-Registration Software for Multi-Sensor Satellite Data by Daniel Scheffler, which is a python library and command line tools for ...
user7821537's user avatar
2 votes

Using OrfeoToolBox in Python 2.7.9 crashes python

I recommend that you copy/paste the issue on the OTB gitlab issue tracker. https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/issues It will notify all otb developers and increase chances that ...
Manuel Grizonnet's user avatar
2 votes
Accepted

What does control points look like in viewer ? How spread do they need to be ?

Imagine your image is a flat piece of paper and you are trying to attach it to the surface of a spherical object with as little folds/wrinkles in the paper as possible by pressing push pins through ...
onakua's user avatar
  • 690
2 votes

Terrain correction / Orthorectification with gdal

Here is the command I use to do it all at once, plus some other helpful settings to help it run a bit quicker. If needed, you can also specify coordinates to chip the image using the -te flag. This ...
MikeF22's user avatar
  • 21
2 votes
Accepted

Error in orthorectification of Radarsat-2 scenes with GDAL and RPC + DEM information

With RS2 you need to point GDAL to either the parent directory or the product.xml file. From your code, you are pointing to the *.tiff file directly. So your modified code should be: gdalwarp -...
not_a_NaN's user avatar
2 votes

Orthorectifying or Georeferencing aerial photographs

It's hard to answer this question without seeing the images, but I'll try. For orthorectification, you need to know internal orientation, deduced from the camera, and external orientation parameters. ...
Yaroslav's user avatar
  • 864
2 votes

Sources for Free High-Resolution (4m or below) Orthophotography (Aerial Photography)

You can try the USGS data portal: https://earthexplorer.usgs.gov/ I have acquired data below 4 m from the site. You use their search tool and select what you are interested in and apply the proper ...
R. Ian Cunningham's user avatar
2 votes

Unable to find the GRASS module i.ortho.rectify on QGIS

Did you install everything cleanly using OSGEO4W? This module is also on my QGIS but the executable is present in the GRASS folder of QGIS. C:\Program Files\QGIS 3.4\apps\grass76\bin You could ...
Vincent Bré's user avatar
  • 4,100
2 votes

How to calculate observation error in RPC model

r means rows. I'm sorry for that useless question.
Tomas's user avatar
  • 21
2 votes
Accepted

Georeferencing orthorectified raster

Re-orthorectifying would of course be ideal, expecially if you can start from the original image, but given that the offset is constant (+/- 1 pixel), probably re-georeferncing is still acceptable and ...
RafDouglas C. Tommasi's user avatar
1 vote

Is there a limit to the number of GCPs that can be used?

The error seems to come from the libtiff library, and the corresponding source code file is https://gitlab.com/libtiff/libtiff/-/blob/master/libtiff/tif_dirread.c So the answer to the question "...
user30184's user avatar
  • 66.8k
1 vote
Accepted

Sources for Free High-Resolution (4m or below) Orthophotography (Aerial Photography)

Earth Explorer has 1m NAIP imagery for the US.
Aaron's user avatar
  • 51.7k
1 vote

Post Orthorectification error reduction?

I ran into the same issues as you while georeferencing images. Sadly there were no real helpful books/texts out there which helped to get information on the offset/distortion. I did the georeferencing ...
Cliff's user avatar
  • 129
1 vote

How to align Aerial images from MassGIS with OSM using python?

I think your assumption that EPSG:26986 and EPSG:4326 are "similar enough" is wrong. One is in metres and the other is in degrees. You should use either gdalwarp to transform the images into EPSG:...
Ian Turton's user avatar
  • 82k
1 vote

Orthorectification in QGIS (ORFEO OTB)

Can you open an issue to the otb issue tracker please? https://gitlab.orfeo-toolbox.org/orfeotoolbox/otb/issues I think that you'll be a better chance to have an answer. I suspect that it is due ...
Manuel Grizonnet's user avatar

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