Point Thinning / Decimating Bathymetric Dataset, with shoal bias

Discussion created by Hydronaut on Mar 10, 2013
Latest reply on Mar 19, 2013 by BBaud-esristaff
Hi all,

I am running ArcGIS 10 with ArcInfo licence and am looking for methods to thin a dataset of bathymetric points, whilst maintaining shoalest depth.

For instance, assume a raw dataset has a very high density of points (less than a metre spacing).

1. How might it be possible to thin the dataset so I am seeing 1 point every 5 metre spacing?
2. In addition, how might it be possible to maintain the shoalest depth within that 5 metre spacing? (ie. the point closest to the water surface that is most likely to be of concern to a navigating ship)