topic Re: Geolocated export workflow in ReCap Forum

Geolocated export workflow

Anonymous — Thu, 14 Jun 2018 08:04:35 GMT

I am currently trying to export aerial survey models created in Recap Photo and need to know the correct workflow.

The photo have been taken with georeference data for GPS, which has been refined with added ground control points in programme. The model compiled and resolved fine. So my queries are:

- Is there a way to check scale and coordinates/level within recap photo to confirm the ground control point have orientated and scaled the model correctly?

- How on earth do I export this to Revit or Civil 3D or even good old AutoCAD and retain the coordinate, level and scale information.

I assume some processing through Recap Pro is required.

Any help would be really apprecaited, as would a published workflow document for this.

Cheers,

Rich

Re: Geolocated export workflow

Anonymous — Thu, 14 Jun 2018 22:28:02 GMT

In addition to the above, it appears when I check the Recap Photo the coordinate system is has changed from the British OS 27700 as process to LL84. We had a similar issue with Drone Deploy, which lead to us abandoning the systew are as the coordinate conversion to the UK didn't work. When checked in revit, the point cloud export in at the correct level (ish) but is out in position by some 30m.

I have been banging my head against a wall on this topic for over a year, please can someone help!

Cheer

Rich

Re: Geolocated export workflow

anil_mistry — Fri, 15 Jun 2018 17:25:02 GMT

Hi @Anonymous,

Thank you for participating in our community!

Is there a way to check scale and coordinates/level within recap photo to confirm the ground control point have orientated and scaled the model correctly?

As far as I know you can't do it in ReCap Photo but you can import model into AutoCAD or Civil 3D to find scale or coordinate of this model.

- How on earth do I export this to Revit or Civil 3D or even good old AutoCAD and retain the coordinate, level and scale information.

At this time, you can do following to convert RCM to RCP to view point cloud model in Revit, Civil 3D or AutodCAD:

Open RCM in ReCap Photo
Export this model to PTS
Create new project in ReCap pro and Import this PTS
Save as RCP or export as unified RCP/RCS to view in Revit, Civil 3D or AutodCAD

Let me know if this helps.

Thank you and have a great day!

Please select the Accept as Solution button if my post solves your issue or answers your question.

Re: Geolocated export workflow

anil_mistry — Mon, 18 Jun 2018 14:38:45 GMT

Hi @Anonymous,

I'm just checking in again to see if you need more help with this. Did the suggestion I provided yesterday work for you?

If so, please click Accept as Solution on the posts that helped you so others in the community can find them easily.

Re: Geolocated export workflow

Anonymous — Tue, 19 Jun 2018 19:03:43 GMT

Hi there Anil,

I short, not really.

I am fine with the overall steps of getting from one program to another, but it is the retention of the coordinate system that seems to fail.

When I convert the original aerial data the x, y and z are all off. Z is fairly close, but the x and y reduce to +/- 200m either side of zero when imported into recap. The UK OS grid easting and northing are around 570000 and 270000 respectively. Civil 3D doesn't seem to recognise the original coordinates, but revit is close (off in easting and northing by around 50m.

I wonder if the lat long conversion from LL84 to 27700 doesn't work correctly. Maybe the one in recap does? The lat long coordinates are slightly out in recap photo, when checked against the coord of my GCP.

Thanks in advance.

Rich

Re: Geolocated export workflow

Anonymous — Thu, 23 Aug 2018 19:02:44 GMT

Hello,

Still no resolution for this issue from Autodesk.

Any help for UK coordinate alignment from anybody would be much appreciated.

Regards,

Richard

Re: Geolocated export workflow

Anonymous — Wed, 29 Aug 2018 11:59:39 GMT

Try this:

When asigning the coordinate system while georeferencing GCP's I choose this system (OSGB-GPS-1997) and choose the same when asked for the Target coordinate system before uploading photos.

In Civil 3D or AutoCad you need to assign the same coordinate system for any file you import the point cloud into.

I choose this system (ETRF89 Referenced OSGB (ETRF89<-->OSGB via OSTN97)) under Great Britan.

After you set that in the settings, then you import the point cloud (RCP or RCS file) and you need to tick where it says (use geographic location) on the window for importing the point cloud into civil 3D or Autocad.

Then you will get your point cloud excatly in correct location.

Hope it helps

Re: Geolocated export workflow

Anonymous — Fri, 26 Oct 2018 16:53:31 GMT

Unfortunately this did not seem to work either.

Have done loads of further digging there seems to be an incompatibility when converting from X and Y to lat long. Is there a way to use an arbitary X and Y grid that is not converted to any lat long system?

If not we will abandon Recap Photo for this and use Bentley's context capture.

Re: Geolocated export workflow

Anonymous — Tue, 05 Feb 2019 21:51:54 GMT

This is NOT a solution to this problem. How do we retain the geolocated data? It sort of defeats the purpose of using GCP's and geolocating the model if we are unable to retain that geolocation when bringing the data to AutoCAD doesn't it? How about autodesk finally comes up with a real solution to this problem. You have made us surveyors waste our time meticulously assigning GCP's etc, for them to eventually be discarded by the software, what gives? Also we don't want to import point clouds, we want to be able to import the 3D model we worked so hard to create. I need to be able to create a TIN off of the 3D model, that is the whole point for us surveyors, who are using your AutoCAD Map 3D product. So far Recap is totally useless for us.

Re: Geolocated export workflow

Anonymous — Wed, 06 Feb 2019 07:41:19 GMT

We have now abandoned Recap Photo in place of Bentley Context Capture software.

Geolocated imports work straight off the bat with no messing about.

Re: Geolocated export workflow

Anonymous — Sat, 28 Sep 2019 18:23:56 GMT

Even though Recap Photo appears to to show that there is geolocation set to my RCM, upon exporting the RCM to any format will not retain the geolocation information. Unless a solution to this is found or created quickly I will also have to explore using other software than Recap Photo.