What is the best way to show the difference in elevation between 0-4 feet for about 100 points. I have the spatial extension and I would like to show change over time. Any suggestions?
Change over time? I think you would have to give us some more info about your data and what it looks like.
And it sounds like you would like to "interpolate" this data into a surface. Lots of potential pitfalls there.
Do you have access to Pro? This would be cool to show in 3D
The map will be for a reef that is going to be restored. I will need to show the depth change over time. The downside is the depth change will more than likely be very minimal.
As Neil says... interpolate for the two time periods, then subtract the results. Interpolation approach should use the same method... what is appropriate is a whole new discussion...
Methods are found in the help topics, make sure you read the 'how... works' sections if present
An overview of the Spatial Analyst Toolbox—Help | ArcGIS for Desktop
Retrieving data ...