Messages

1

General / Re: How to tranform to Irish Transverse Mercator, with Malin Head Datum

« on: April 03, 2019, 02:06:26 PM »

Harry,
Are you perchance using DJI kit? - there's a notorious and long running issue where the 'height' in the EXIF is actually barometric height above the take-off point.
Dave

2

General / Re: tie points and key points

« on: March 28, 2019, 12:21:51 AM »

Zagnimarco1,

They're not PhotoScan/MetaShape software specific terms - they're relatively standard photogrammetry terms.

Very crudely:
   Key point = a distinct feature in one single image
   Tie point = where same feature has been recognised in multiple images

Dave

3

General / Re: Measure Export Scalebars - converting

« on: March 27, 2019, 01:50:51 PM »

Schorge,
What units are your x, y and z?
Dave

4

General / Re: KMZ ground location is not accurate when imported to Google earth plss help me

« on: March 27, 2019, 01:45:07 PM »

Aceproject,
You need to give more information. You say 'not accurate'. Is it out by centimetres? metres? kilometres? wrong continent / mid-ocean?     Is it 'wrong' in all directions? or is it just too high or too low?  How is your model referenced? Did you use GCPs?

5

General / Re: DEM elevation values -130 m below GCP elevations.

« on: March 24, 2019, 02:17:22 PM »

Gerry,
Almost certainly it is the long-running issue with DJI kit recording elevations as those above takeoff point, not above the ellipsoid or any other datum. If you search here on the forum  for, say, DJI height you can find other threads on this and solutions to correct the DJI data.
Dave

6

General / Re: Import several LAS-Files at once?

« on: March 13, 2019, 09:27:05 PM »

Foxx1,

If you can only import a single file, just use LAStools to merge them all into one LAS file.
You can download LAStools here: https://rapidlasso.com/lastools/

Dave

Edited to add download link

7

General / Re: How to remove/disable photos before dense cloud?

« on: March 13, 2019, 01:58:39 PM »

8ashe - MetaShape is just version 1.5 of PhotoScan and it is a free upgrade for all licensed PhotoScan users; there are also other advantages to running current version of the software.
If for some reason you are forced to use an old version, it could be useful if you could advise exactly which version that is.
Dave

8

General / Re: Hello, I am new to photogrammetry and I have lots of very specific questions

« on: March 13, 2019, 01:52:11 PM »

Tymal77,
As a first step, I would suggest you share one of your source images and also a screenshot of your resultant model.
Dave

9

General / Re: Batch process without resetting alignment

« on: March 09, 2019, 03:40:44 PM »

Bump.

Sensehawkrd - might I suggest that the Agisoft team are entitled to their weekend and it may be Monday before they reply to your Friday evening post.
Dave

10

General / Re: Problem with DEM measurement (tilted polygon)

« on: March 09, 2019, 01:33:08 PM »

Erick - if you've got access to Surfer, I would use that and then you could back-compare to result from MetaShape - which may well give the same answer!
cheers/Dave

11

General / Re: Problem with DEM measurement (tilted polygon)

« on: March 09, 2019, 11:00:43 AM »

Erick,

Personally my go-to tool for something like this is Surfer - I'd just take the two DEMs and subtract them in Surfer using a polygon (drawn or imported) as a bounding/blanking line. You could also use Cloud Compare (clue is in the name!), and probably also in QGIS, ArcGIS, AutoCAD Civil, TBC...

Dave

12

General / Re: Photo Alignment does the whole process but the result is 0 cameras aligned

« on: March 08, 2019, 04:27:04 PM »

Jaborep,

I can't help you personally but couple of items it would help others to advise are:
1) What version of PhotoScan MetaShape do you have on your PC?
2) What version of PhotoScan MetaShape does your friend have on their PC?
3) Can you post (attach) the console log for a failed run from your PC?

Dave

13

General / Re: Strange artifact after DEM creation

« on: March 05, 2019, 06:08:28 PM »

Jurijs, If this is acquired with DJI UAV, then this will be the infamous DJI height-above-takeoff bug - just search here on the forum for   DJI height   and you'll find lots about it and also haw you can resolve it.

Dave

14

General / Re: Alignement photos

« on: March 04, 2019, 01:56:30 AM »

Dronepaca,
J'essaerai ecrivez en Francaise. Est-ce-que les photos sont prier avec un drone DJI? Si oui, je pense que peut-etre vous avez trouvez la problem avec l'appareille DJI que l'altitude de chaque vol c'est haut plus de la place que la vol commence; et c'est different chaque vol. Si vous cherchez ici dans cet forum pour   DJI height   vous peut trouvez beacoup sur c'est problem DJI et aussi comment on peut changez l'haut.
Cordialment
Dave

15

General / Re: help install metashape on ubuntu 18.04

« on: March 02, 2019, 01:10:51 PM »

Alberto,
Installation is in chapter 1 page 3 of the manual.

If you use the [Search] button at the top of the forum page and put Ubuntu, there are 100+ hits including installation. If you do a Google search       site:agisoft.com/ Ubuntu installation    there are similarly over 100 hits - I'm sure if you look at either of those you will find helpful information.

Dave