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Hi I have been preparing floodplain maps in vertical mapper and mapinfo but am unable to get the presentation I require. I usually start by importing the *.asc file from tuflow_to_gis.exe into vertical mapper and once I have a grid I have tried the following: 1. reclassify the grid into separate classes based on inundation depth range - however this method produces maps that are not crisply defined at the edges (they are hazy) 2. contour the grid into various colour regions - however this produces a map that does not show the individual grid squares because the contours smooth it out into triangles on the boundaries between colours. 3. reclassify the grid first, and then contour the reclassified grid into regions. This produces a nice crisp map with the inundation depth range colour visible in each grid square, however each class is separated by a black line that I am not able to remove in Mapinfo successfully. So what I am after is a nice crisp mapinfo layer of the flood inundation depth ranges that is not separated by black lines. An example of what I am after is attached. Can someone please let me know where I am going wrong?