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conservation target files are already loaded into the map view. To get an idea of what theTarget Prep tool does, you can load any of the sample target shapefiles into the view(target_point_species.shp, target_line_ habitats.shp, or target_polygon_habitats.shp).Now, open up the attribute tables of one of the sample target shapefiles by right clickingon the layer and choosing “Open Attribute Table”. You will see that in addition to theTARGET NAM and TARGET_ID fields, there are additional fields that are described inthe table below. These additional fields are created using the Target Prep tool and will beused in the next step (Marxan Input Generator - MIG) to extract the field information andcreate the Marxan input files. More information about each of these parameters can befou nd in Game and Grantham (2008), Ball & Possingham (2000) and Possingham et al.( 2000).The Marxan Target Prep routine generates all the fields listed below the Target_Nam and Target_ID fields.Once populated, these fields can then be used in the Marxan Input Generator (MIG).FIELDTARGET_NAMTARGET_IDGOALTYPESPFOCCCLUMPTYPETEXTINTEGERFLOATINTEGERINTEGERINTEGERINTEGERDESCRIPTIONTarget Name. The name of the conservation target. Thisfield can include spaces, but all words must start with aletter. Try to limit the length of the target name to fewerthan 50 characters. A duplicate of this field will becreated by the Target Prep tool and named TNAME.Target ID. The unique ID assigned to each conservationtarget. The ID should be limited to no greater than 16numbers in length. A duplicate of this field will becreated by the Target Prep tool and named TID.Target Goal. The conservation goal for each target statedin number of occurrences (points), length (lines), or area(polygons). An alternative of defining the goal is to usethe PROP field (Proportion) in the Block Definition file.Do not use both methods – choose one or the other.Make sure the units are consistent with what is specifiedin the MIG conversion window (default hectares andkilometers). Total field length is 15 numbers.Target Type. This is a user-defined number used in theblock definition file. Could be the same as the Target_ID.Total field length is 16 numbers.Species Penalty Factor. Higher numbers (e.g. 100,000)ensure that conservation goals are met. Can be adjustedaccordingly for priority targets. Total field length is 16numbers. Total field length is 16 numbers.Target Occurrence. The number of occurrences of theconservation target required. This can be used inconjunction with or instead of the goal. Total field lengthis 16 numbers.Minimum Clump Size. If a clump of a number ofplanning units with the given conservation target isbelow this size, then it does not count toward the goal.TNC Protected Area Tools (PAT) Version 3.0The Nature Conservancy, August 200957