Kirk,
I find you article a good read, and also contradictory. I think factors that define point accuracy are in effect the basic units that define feature accuracy - depicting the spatial details of targets. To repeat, the resolution of a feature has no spatial accuracy of its own, it depends on the accuracy and density of the points that depict it.
So, as point accuracy is the "atom" of feature accuracy, Randy is right. You are wrong to try to isolate feature accuracy from point accuracy. You are right that point accuracy is different from point spacing. But in the context of this discussion, Randy makes sense to me. Or maybe, I am just another Randy :)
I will want to point out that that a high spatial resolution does not necessarily translate into better feature depiction. Sometimes it only means increase in cost and processing time. Depending on the application envisioned, it is important to design you point density requirement to meet that need. I have read in http://eprints.usq.edu.au/3781/1/Liu_Zhang_Peterson_Chandra.pdf about LiDAR points reduced up to 50% but still allowing feature(DEMs in this case)accuracies to be below 20cm
Patrick Adda
July 6, 2012
Kirk,
I find you article a good read, and also contradictory. I think factors that define point accuracy are in effect the basic units that define feature accuracy - depicting the spatial details of targets. To repeat, the resolution of a feature has no spatial accuracy of its own, it depends on the accuracy and density of the points that depict it.
So, as point accuracy is the "atom" of feature accuracy, Randy is right. You are wrong to try to isolate feature accuracy from point accuracy. You are right that point accuracy is different from point spacing. But in the context of this discussion, Randy makes sense to me. Or maybe, I am just another Randy :)
I will want to point out that that a high spatial resolution does not necessarily translate into better feature depiction. Sometimes it only means increase in cost and processing time. Depending on the application envisioned, it is important to design you point density requirement to meet that need. I have read in http://eprints.usq.edu.au/3781/1/Liu_Zhang_Peterson_Chandra.pdf about LiDAR points reduced up to 50% but still allowing feature(DEMs in this case)accuracies to be below 20cm