D-11 
C '■VolX'\BD09?0?01 cst 
,C WoOOVBDOSTCTOT log 
Convert ESI to TXT 
CHESAPEAKE BAY PROGRAM INTERPOLATOR 
P*fame<ci 1 0*U Import I / /n-»rxx>y 1 M«ilh 
Geography 
MM 
Report* 
fcP C WoTX)'vSDO9707O1 D30 
Figure D-11. 3D Inverse-Distance Squared Interpolate screen populated 
with entries after having made choices on previous screens. The 2D 
Inverse-Distance Squared Interpolate screen uses the same format as 
the 3D Inverse-Distance Squared model; however, only the surface 
depth value has computed values. Cell values at depths below surface 
are set to missing (generally -9). The 2D Octant Search Interpolator 
does not rely only on the closest data in all directions, but rather uses 
data from data from surrounding octants. For example, if 4 nearest 
neighbors are requested in each of 8 octants surrounding the cell being 
computed—up to 32 nearest neighbor values will be used to compute 
the value. If no nearest neighbor values are available, a missing value 
will be computed. Other buttons are available for creating data using 
specific formats for various GIS (.txt files) and graphics applications 
(,t3d files). 
Figure D-12. Batch Job File Name selection window that displays after 
choosing "Batch" radio button on Interpolation screen. 
appendix d 
User Guide and Documentation for the Chesapeake Bay Interpolator 
