The Contour base, would be the altitude of the first contour line, Basically. The Resolution - Defines the horizontal distance for which the altitude Value registered. ( the Higher the resolution, the smoother the contour lines) Minimum line size- Defines the minimum number of vertices that a contour line can have. Lines with less vertices will be deleted and less noise will be produced. I attempted to attach a link to Pix4d support that explains this in more Detail. support.pix4d.com/hc/en-us/articles/202558419#label2&gsc.tab=0
So how does this correct for elevation changes within the point clouds that you're deleting? ie. Trying to include a forested edge of a field with varying elevation that differs within the wooded section compared to the field.
That's what I figured. So this is, as suspected... NOWHERE NEAR A DEM. Its an "estimated" depiction of the cameras height to where it thinks the ground might be. If trees/buildings are involved, you will achieve no accurate ground level elevation. (Btw... this is not a slight against the OP here)
Sorry I was the problem with this kind of heads up digitizing... what if I said Vehicles War elevated 10 feet above ground level and once you delete that spot the program now believes that the area that you digitized is equal to the area around it which is 10 ft off base.
Thank you so much . LOVE FROM ZIMBABWE
thank you!
About damn time I found a video on this
I'm doing exactly as you say only when I re-process step three it still shows the points I deleted in the contours. Any ideas?
can you explain the options for contour lines what is contour base, resolution and minimum line size?
The Contour base, would be the altitude of the first contour line, Basically.
The Resolution - Defines the horizontal distance for which the altitude Value registered. ( the Higher the resolution, the smoother the contour lines)
Minimum line size- Defines the minimum number of vertices that a contour line can have. Lines with less vertices will be deleted and less noise will be produced.
I attempted to attach a link to Pix4d support that explains this in more Detail.
support.pix4d.com/hc/en-us/articles/202558419#label2&gsc.tab=0
So how does this correct for elevation changes within the point clouds that you're deleting? ie. Trying to include a forested edge of a field with varying elevation that differs within the wooded section compared to the field.
All it will do is delete the points in the area you want, say in the middle of a site then it will project a flat area from all surrounding points.
That's what I figured. So this is, as suspected... NOWHERE NEAR A DEM. Its an "estimated" depiction of the cameras height to where it thinks the ground might be. If trees/buildings are involved, you will achieve no accurate ground level elevation. (Btw... this is not a slight against the OP here)
Sorry I was the problem with this kind of heads up digitizing... what if I said Vehicles War elevated 10 feet above ground level and once you delete that spot the program now believes that the area that you digitized is equal to the area around it which is 10 ft off base.
In this case, I would be precise when deleting the point cloud ( the base of the Vehicle) so you capture the ground it sits on.