[Qgis-user] Batch Aerial Imagery GeoReferencing

[John Layt]

Hi Richard,

The Historic England aerial photography team have been working on a
similar sort of project which they recently released (see
https://historicengland.org.uk/whats-new/news/new-virtual-aerial-map-allows-everyone-to-explore-englands-archaeology-from-the-air/).
Perhaps they might be able to provide some advice on how they did it?
There's an email address at
https://historicengland.org.uk/research/methods/airborne-remote-sensing/.

Cheers!

John.


On Wed, 3 Nov 2021 at 10:27, Richard McDonnell <richard.mcdonnell at opw.ie>
wrote:

> Hi Kirk and Charles,
>
> Thanks for your reply. This is what we know…
>
>
>
> CAMERA:                            Wild RC8 and RC10 152mm Focal Length.
>
> ALTITUDE:                          4,560m with Block Adjustments for
> Mountainous areas
>
> IMAGE OVERLAP:             60% along track 25% side lap and all flight
> line Orientations East – West except for offshore.
>
>
>
> Im afraid though that GPS just wasn’t a thing when these images where
> captured. We have been looking at reverse geotagging the Images, that is we
> know there location…ish and we can convert them to jpegs with EXIF values
> assigned in theory.
>
> Though the biggest issue is, in talking on the guys on the Open Drone
> Mapper forum, our overlaps aren’t sufficient for SFM, so an automated
> process will be out of the question.
>
> Once again, thanks for getting back, if you can think of anything else,
> please let me know.
>
> Regards,
>
>
> Richard
>
>
>
> ——
> Richard McDonnell MSc GIS, FME Certified Professional
> *FRM Data Management*
>
> ——
> Oifig na nOibreacha Poiblí
> Office of Public Works
>
> Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36
> Jonathan Swift Street, Trim, Co Meath, C15 NX36
> ——
> M +353 87 688 5964 T +353 46 942 2409
> https://gov.ie/opw
>
> ——
> To send me files larger than 30MB, please use the link below
> https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie
>
> Email Disclaimer:
> https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
>
> *From:* Qgis-user <qgis-user-bounces at lists.osgeo.org> *On Behalf Of *Kirk
> Schmidt
> *Sent:* 01 November 2021 12:59
> *To:* qgis-user at lists.osgeo.org
> *Subject:* Re: [Qgis-user] Batch Aerial Imagery GeoReferencing
>
>
>
> Hi Richard:
>
> You would require a couple of things:
>
> 1) Camera interior orientation which would include the lens calibration
>
> 2) exterior orientation which would include precise coordinate at time of
> exposure as well as the pitch, roll and yaw of the camera.
>
> 3) the offsets from the camera film or sensor center to the center of the
> aircraft gps antenna.
>
> 4) an accurate DEM or your target area
>
> If you have the above data, you can autoreference your images.
>
> If the images have a high endlap and sidelap, you could use commercial
> software such as Pix4D or  Global Mapper to orthorectify the images based
> on structure from motion.  Check into drone orthorectification software.
>
> Kirk
>
>
>
>
>
> On 10/29/2021 9:13 AM, Richard McDonnell wrote:
>
> Afternoon all,
>
> I have access to over 6000 Aerial Images covering Ireland, we also have
> scans of the Flight Paths and Image Orientation and Extents (Scans from
> Paper Maps)
>
> What I was wondering is if there is a way to Batch Georeference all of
> these Images?
>
> Any Ideas, help, guidance welcome. I have thought about maybe even reverse
> engineering the Flight Plan, then using OpenDroneMap to georeference the
> Images.
>
> Regards & Thanks,
>
>
>
> Richard McDonnell
>
>
> * ——*
> *Richard McDonnell MSc GIS, FME Certified Professional*
> *FRM Data Management*
>
> ——
> *Oifig na nOibreacha Poiblí*
> Office of Public Works
>
> *Sráid Jonathan Swift, Baile Átha Troim, Co na Mí, C15 NX36 *
> Jonathan Swift Street, Trim, Co Meath, C15 NX36
> ——
> M +353 87 688 5964 T +353 46 942 2409
> https://gov.ie/opw
>
> ——
> To send me files larger than 30MB, please use the link below
> https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie
>
> Email Disclaimer:
> https://www.gov.ie/en/organisation-information/439daf-email-disclaimer/
>
>
>
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> --
>
> Kirk Schmidt, MScF, BScF, RPF
>
> General Manager
>
> Nortek Resource Solutions Inc.
>
> 26 Church Road
>
> Sutherlands River, NS
>
> B0K 1W0
>
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>
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>
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>
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