I am trying to use Natural Neighbor Interpolation on a set nodes (100,000's) to create a raster surface that has a grid resolution of 1x1 meter. When I symbolize the raster to be n=0 clear, and n>0 my specific color ramp I created, the edge of the n>0 extent is scallop shaped. Is anyone familiar with this and know how to solve this without using 3D analyst?
The scallop or bubble shape in between the white dots. White dots are 0 and the blue is anywhere between 1 and 100. Because of the NNI, there is some excess interpolation out to the white dots. So between the Blue and white dots there is data that doesn't actually naturally occur. We to get rid of the "scallop shape".
I think you are expecting "interpolation" to do something it is not designed to do. It will interpolate between low and high depending on the decay function.
So, if you do not think this is "real", do as Dan_Patterson says, make a clip polygon and clip out the bit that you "like".
If you have a grid resolution of 1 m... there is no need to interpolate, just convert to raster using a cell size of 1.5 or 2. You are going to get no extra 'precision' doing an interpolation, as your data is suggesting
Our point feature class shape file is not a 1 m grid. We want to interpolate to a 1 meter grid. The problem lies in the scallop shape interpolated edge between the Blue dots and the white (0's) dots. The green yellow and red raster is showing the issue.
