[Qgis-user] Batch Aerial Imagery GeoReferencing
Kirk Schmidt
kirk at nortekresources.com
Wed Nov 3 03:54:59 PDT 2021
Hi Richard:
It sounds like you are in the world of manually georeferencing or ortho
creation. This would entail identifying ground control points for each
image and processing.
Assuming you do not need all 6000 images at one time, you could tag each
image to its central location and then ortho or geo it if it is needed.
Kirk
On 11/3/2021 7:45 AM, John Layt wrote:
> 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 <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
> <https://filetransfer.opw.ie/filedrop/richard.mcdonnell@opw.ie>
>
> Email Disclaimer:
> https://www.gov.ie/en/organisation-information/439daf-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
>
> Tel (902) 922.3607
>
> Email:kirk at nortekresources.com
>
> Web:www.nortekresources.com <http://www.nortekresources.com>
>
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--
Kirk Schmidt, MScF, BScF, RPF
General Manager
Nortek Resource Solutions Inc.
26 Church Road
Sutherlands River, NS
B0K 1W0
Tel (902) 922.3607
Email:kirk at nortekresources.com
Web:www.nortekresources.com
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