Index: /branches/eam_branches/ipp-20131211/Ohana/src/libdvo/include/dvo.h
===================================================================
--- /branches/eam_branches/ipp-20131211/Ohana/src/libdvo/include/dvo.h	(revision 36464)
+++ /branches/eam_branches/ipp-20131211/Ohana/src/libdvo/include/dvo.h	(revision 36465)
@@ -308,4 +308,6 @@
 # define BOUNDARY_TREE_NAME_LENGTH 128
 
+// BoundaryTree is a structure to describe the 3pi RINGS skycell boundaries in terms of lines of constant (RA,DEC)
+// the structure is flexible for a variety of RINGS-like tessellations, but is not appropriate for the LOCAL style tess
 typedef struct {
   int FixedGridDEC;	      // is the DEC sequence linear?
@@ -342,13 +344,28 @@
 } BoundaryTree;
 
-// XXX DROP? // a reduced-subset structure for relastro
-// XXX DROP? typedef struct {
-// XXX DROP?   double         R;
-// XXX DROP?   double         D;
-// XXX DROP?   unsigned short Nmeasure;
-// XXX DROP?   int            measureOffset;
-// XXX DROP?   uint32_t       flags;
-// XXX DROP?   int            catID;
-// XXX DROP? } AverageTinyAstro;
+typedef enum { TESS_NONE, TESS_LOCAL, TESS_RINGS } TessType;
+
+// TessallationBoundaries is a structure to describe the LOCAL skycell boundaries in terms of lines of constant (RA,DEC)
+// the structure describes the boundaries of a SINGLE projection cell with Nx * Ny skycells
+typedef struct {
+  double Rmin; // this tessellation is valid only for RA >= Rmin
+  double Rmax; // this tessellation is valid only for RA <  Rmax
+  double Dmin; // this tessellation is valid only for DEC >= Dmin
+  double Dmax; // this tessellation is valid only for DEC <  Dmax
+
+  double Xo;
+  double Yo;
+  double Ro;
+  double Do;
+  double dPix;
+  int dX;
+  int dY;
+
+  int NX_SUB;
+  int NY_SUB;
+
+  TessType type;
+  BoundaryTree *tree;
+} TessallationBoundary;
 
 // a reduced-subset structure for relphot