Hi,
Hopefully someone will have an answer for this, although perhaps it is outside the tools available in ArcGIS (Version 9.3)
I'm extracting Stats from a raster based on zones defined by polygons. The zones are the 4 quadrants of a circular site. Quadrants are defined by diagonal lines, not horizontal and perpendicular. (zones represent collections of ground sampling points)
Zonal Stats will rasterise the zones, but recommends creating the rasters for the zones independently first to retain control over this.
I've run Polygon To Raster, and have a raster with 4 attributes representing the 4 quadrant zones. But the quadrants all have different numbers of cells - ranging from about 86 to 71 cells per zone. Where cells are split by the diagonal line, obviously decisions are made about which zone gets the cell.
I want to edit these zones manually (I don't have that many). The goal is to get the zones to have similar cell counts, but also make sure all cells surrounding ground sampling points are included. Thus, I need to add a few cells around the edges, and delete cells along the diagonal boundaries.
ArcScan SEEMS to be the only tool, but I can't get it to achieve my tasks:
1. Delete tool is minimum size of 4 x cells I need to delete single pixels.
2. When saved, the output file retains the attributes of the original raster - each zone still has the original cell count, although visually it displays with added and deleted cells.
Many thanks if anyone has any ideas,
Steve
