> 1. Is it possible to get the number of nodes in a Polyline?
Getting the number of nodes for a pline is found through ObjectInfo.
Dim bObject As Object
Dim nNumNodes As Integer
bObject = PolylineTable.Obj
nNumNodes = ObjectInfo(bObject, OBJ_INFO_NPNTS)
> 2. in the next step I would like to get the coordinates for all the nodes which are > building a polyline.
Use the ObjectNodeX and ObjectNodeY commands to grab the x and y coordinates of the nodes. You can use a counter to loop thru the polyline node by node. It would also be helpful to check for plineness - ObjectInfo(bObject, OBJ_INFO_TYPE) - before the loop as I have found MapBasic to be a little tipsy with ObjectNode and a regular old line.
Dim Xcoord As Float
Dim Ycoord As Float
For nCntr = 1 To nNumNodes
Xcoord = ObjectNodeX(bObject, 1, nCntr)
Ycoord = ObjectNodeY(bObject, 1, nCntr)
Next
