Download the Tutorial

More documents

Recommendations

Info

layers (risk element groups) and leave the default values for the remainder of the inputparameters.If you want to see the commands as they are executed, you need to open your CommandLine Window by clicking on the Open/Close Command Line Window button in theArcGIS menu bar. When ready, click OK to execute the model. You will notice in thelower left-hand corner of ArcMap, the risk element layer number that is being processed.As the processing consumes much of the computer’s resources, it is best not to work onthe computer or click on ArcMap while the model is executing. Once the model isfinished, a text box stating “Processing Complete” will appear and the results will beloaded into the map view.1.3.3 Viewing the ERS Results and Summarizing Spatial StatisticsWhen the ERS model has finished processing, the final grid will appear in your map viewand have the spatial extent of the boundaries of all specified input layers. The output gridis displayed in the view with the background values set to zero, but the user can modifythis and other display parameters using Layer Properties > Symbology. All of theintermediate processing steps are saved into the specified PAT scratch directory. Thisdirectory is deleted every time ArcMap is started.Zonal Statistics in Spatial Analyst can now be used to summarize the ERS surfacestatistics by planning unit hexagon or habitat polygon. In doing so, planning units can beassigned a mean cost value for use in Marxan or habitat polygons/lines/points can beranked by the underlying ERS area-weighted statistics. In order to do this, each planningTNC Protected Area Tools (PAT) Version 3.0The Nature Conservancy, August 200924
unit or feature (i.e. polygon) must have a unique ID field. If you do not have a unique IDfield present, you must add a new integer field to the table and calculate the field to aunique value (e.g. FID field).In this example, we will use the tydixton_planning_units.shp file to run zonal statistics ofthe ERS grid. This file was created using the HexGen tool listed under the Marxan Tools.Add this shapefile to the view and go to Spatial Analyst > Zonal Statistics. Make sure thefollowing fields have been defined before clicking OK:Zone dataset: tydixton_planning_units.shpZone field: IDValue raster: Your ERS ouput gridIgnore NoData in calculation: checkedJoin output table to zone layer: uncheckedChart statistic: uncheckedOutput table: specify the directory and name of the table. (e.g. zstat1.dbf)Once you click on OK, the surface univariate statistics of the ERS are computed withinthe boundaries of each unique planning unit hexagon. The zstat table will appear whichcan now be used to join back to the polygon shapefile by right-clicking on the planningunit shapefile and going to Joins and Relates > Join. When the Join Data dialog boxappears, choose “ID” as the field that the join will be based on, make sure that the zstatoutput table is the table to join, and then choose the “OID” field in the table to base thejoin on. If you are using the habitat polygons and want to spatially equalize your ERSmean values, you may consider area weighting the ERS mean values by creating an areafield (e.g. hectares or meters sq) in the habitat polygon attribute table and dividing thepolygon mean value by the area of the polygon.Once you havejoined the tablestatistics to theplanning unitshapefile, close thetable and doubleclick on theplanning unit layerto bring up theLayer Properties.Click on theSymbology tab andspecify Quantities >Graduated color.Choose the FieldValueof“zstat.MEAN” (orthe area-weightedTNC Protected Area Tools (PAT) Version 3.0The Nature Conservancy, August 200925
Page 1 and 2: Protected Area Tools (PAT)TMfor Arc
Page 3 and 4: AcknowledgementsThe idea for the de
Page 5 and 6: Mandatory Requirements Needed to Ru
Page 7 and 8: Installing the Protected Area Tools
Page 9 and 10: The majority of the work that goes
Page 11 and 12: data to spatially represent the spe
Page 13 and 14: 2003, Araújo et al. 2002). In some
Page 15 and 16: 1.1 Setting up the ERS TableSuccess
Page 17 and 18: 1.1.1 Overlay FunctionAnother item
Page 19 and 20: features have been added to the map
Page 21 and 22: the output will automatically defau
Page 23: Once you click OK in the previous m
Page 27 and 28: higher elevations and ridges moving
Page 29 and 30: 1.3.4.2 Marine ERS ModelsDeveloping
Page 31 and 32: MODULE 2. Relative Biodiversity Ind
Page 33 and 34: Normalized relative biodiversity in
Page 35 and 36: EXERCISE 2. Calculating the Relativ
Page 37 and 38: the targets (polygons with lots of
Page 39 and 40: Once this step is performed, you ca
Page 41 and 42: This selection routine will choose
Page 43 and 44: 3.0 The MARXAN AlgorithmOne of the
Page 45 and 46: 6. All input features must have the
Page 47 and 48: grid of squares or lattice of hexag
Page 49 and 50: • To make "area" and "length" com
Page 51 and 52: Sug gested steps for preparing inpu
Page 53 and 54: 2. Planning Unit File (pu.dat)This
Page 55 and 56: ‘id2’ are set but no value for
Page 57 and 58: conservation target files are alrea
Page 59 and 60: An example of what an attribute tab
Page 61 and 62: values. These values will be used i
Page 63 and 64: Occurrence (OCC), Minimum Clump (CL
Page 65 and 66: 3.2.4 Combining Marxan Input FilesI
Page 67 and 68: 2. Click onto the Run Options tab p
Page 69 and 70: This is the folder where the output
Page 71 and 72: 3.4 Joining and Displaying Marxan O
Page 73 and 74: Figure 12. Results of joining the t
Page 75:
McPherson, M, S. Schill, G. Raber,
show all

Download the Tutorial

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?