Messages

61

General / Re: accuracy of 3d model in z direction??

« on: November 01, 2016, 07:13:18 PM »

can you share your flight design parameters and camera setup settings?, error in Z should be on par or just a bit worse than XY errors. it is typically just about 1.5 times higher.

Processing Parameters
General
Cameras 70
A ligned  cameras 70
Markers 12
Coor dinat e  sy st em W G S   84  (E P S G : : 4326)
P o i n t   C l o u d
P oint s 139, 310  of   170, 978
RM S   r epr ojec t ion  er r or 0. 207879  ( 1. 1 1589  pix )
M ax   r epr ojec t ion  er r or 1. 161 1 1  ( 40. 9082  pix )
M ean  k ey   point   siz e 4. 45752  pix
E f f ec t iv e  ov er lap 4. 19256
A l i g n men t   p aramet ers
A c c ur ac y High
P air   pr eselec t ion Disabled
K ey   point   limit 400, 000
T ie  point   limit 10, 000
Const r ain  f eat ur es  by   mask No
A dapt iv e  c amer a  model  f it t ing Y es
M at c hing  t ime 1  hour s  51  minut es
A lignment   t ime 4  minut es  36  sec onds
O p t i mi z at i o n   p aramet ers
P ar amet er s f ,   b1,   b2,   c x ,   c y ,   k 1- k 3,   p1,   p2
O pt imiz at ion  t ime 26  sec onds
S o f tware
V er sion 1. 2. 6  build  2834
P lat f orm W indows  64  bit


Nu mber  of   i mages: 70
Fl y i n g  al t i t u de: 175 m
Grou n d  resol u t i on : 5. 33  cm/ pi x
Cov erage  area: 0. 0743  km²
Camera  st at i on s: 70
T i e  poi n t s: 139, 310
Proj ect i on s: 536, 744
Reproj ect i on   error: 1. 12  pi x

62

General / Re: Vertical Coordinate System: Geoid Height Above WGS 84 Ellipsoid = 0 meters

« on: October 31, 2016, 10:23:39 PM »

Hello ahmed KIMOO,

By default PhotoScan is using height above ellipsoid (unless compound coordinate system based on a different geoid is used), so wouldn't it be sufficient for your needs o use WGS84 (EPSG::4326) coordinate system, knowing that the height is measured above the ellipsoid?

thanks
i used WGS (epsg:4326)
the errors of check points for x, y is good but for the hight is large near or more 20 cm
what is cause this

63

General / Re: accuracy of 3d model in z direction??

« on: October 31, 2016, 09:26:03 PM »

?

64

General / Re: Vertical Coordinate System: Geoid Height Above WGS 84 Ellipsoid = 0 meters

« on: October 31, 2016, 09:24:44 PM »

thanks
i used WGS (epsg:4326)
the errors of check points for x, y is good but for the hight is large near or more 20 cm
what is cause this

65

General / Vertical Coordinate System: Geoid Height Above WGS 84 Ellipsoid = 0 meters

« on: October 31, 2016, 05:45:34 PM »

i have height with the following condition im WGS84
Vertical Coordinate System: Geoid Height Above WGS 84 Ellipsoid = 0 meters
how can i import it ??
thanks,

66

General / accuracy of 3d model in z direction??

« on: October 31, 2016, 04:55:14 PM »

hello,
i'm use agisoft photoscan for uav , after using control points the accuracy of check points in x and y were good but in z was not accurate ( error = 20 cm )
i tried for many project and thr result was the same
what is the problem for this??
how can reduce the error in z direction??
thanks,