GEOG 375 Final Project Robert Abbotts Spring 2013

Code Explanation Set Input shapefile from user input inFeatures = arcpy.GetParameterAsText(0) Set local variable to required shapefiles join_features = "//sac/GIS_Script_Shapefiles/24kquad_trim.shp" plss="//sac/GIS_Script_Shapefiles/pls_fill.shp" county="//sac/GIS_Script_Shapefiles/Counties.shp" Get input folder inputfolder = os.path.dirname(inFeatures) Check if shapefiles exist, if they are, delete them if os.path.isfile(inputfolder+"\out.shp"): arcpy.Delete_management(inputfolder+"\out.shp") if os.path.isfile(inputfolder+"\outcounty.shp"): arcpy.Delete_management(inputfolder+"\outcounty.shp") if os.path.isfile(inputfolder+"\PExport.shp"): arcpy.Delete_management(inputfolder+"\PExport.shp") Set local variables for shapefiles out_feature_class = inputfolder+"\out.shp" out_county_class = inputfolder+"\outcounty.shp" outFeatures = inputfolder+"\PExport.shp"

Code Explanation Use Spatial join geoprocessing tools to create output shapefiles arcpy.SpatialJoin_analysis(inFeatures, join_features, out_feature_class) arcpy.SpatialJoin_analysis(out_feature_class, plss,out_county_class) arcpy.SpatialJoin_analysis(out_county_class, county, outFeatures)

Code Explanation Set local variables for table fields fieldName1 = "GIS_ID" fieldLength = 16 fieldName2 = "DDLAT" fieldPrecision2 = 9 fieldName3 = "DDLON" fieldPrecision3 = 9 fieldName4 = "TEALE_X" fieldPrecision4 = 9 fieldName5 = "TEALE_Y" fieldPrecision5 = 9

Code Explanation Add GIS_ID, DDLAT, DDLON, TEALE_X, TEALE_Y fields arcpy.AddField_management(outFeatures, fieldName1, "TEXT", "", "", fieldLength) Calculate fields for update data to dispplay date, GPS date and GPS person in the table arcpy.CalculateField_management(outFeatures, fieldName1, '"%s%s%s%s" % (!Datafile![0:8], !GPS_Date![-4:-1],!GPS_Date![-1], !GPS_Person!)', "PYTHON") arcpy.AddField_management(outFeatures, fieldName2, "DOUBLE", "", "","","","NULLABLE","") arcpy.AddField_management(outFeatures, fieldName3, "DOUBLE", "", "","","","NULLABLE","") arcpy.AddField_management(outFeatures, fieldName4, "DOUBLE", "", "","","","NULLABLE","") arcpy.AddField_management(outFeatures, fieldName5, "DOUBLE", "", "","","","NULLABLE","") Add X Y fields and calculate fields for X, Y from Point_X and Point_Y arcpy.AddXY_management(outFeatures) arcpy.CalculateField_management(outFeatures, fieldName4, '!POINT_X!', "PYTHON") arcpy.CalculateField_management(outFeatures, fieldName5, '!POINT_Y!', "PYTHON")

Code Explanation Convert X Y to Lat/Lon using update cursor using for loop desc = arcpy.Describe(outFeatures) shapefieldname = desc.ShapeFieldName try: row, rows = None, None rows = arcpy.UpdateCursor(outFeatures, r'', \ r'GEOGCS["GCS_WGS_1984",' + \ 'DATUM["D_WGS_1984",' + \ 'SPHEROID["WGS_1984",6378137,298.257223563]],' + \ 'PRIMEM["Greenwich",0],' + \ 'UNIT["Degree",0.017453292519943295]]') for row in rows: feat = row.getValue(shapefieldname) pnt = feat.getPart() row.DDLat = pnt.Y row.DDLon = pnt.X rows.updateRow(row)

Code Explanation Except clause if error occurred and delete table rows and temp shapefiles except: if not arcpy.GetMessages() == "": arcpy.AddMessage(arcpy.GetMessages(2)) finally: # Regardless of whether the script succeeds or not, delete # the row and cursor # if row: del row if rows: del rows Delete fields and shapefile dropFields = ["POINT_X", "POINT_Y", "Join_Count", "TARGET_FID","Join_Cou_1","TARGET_F_1","Join_Cou_2","TARGET_F_2","AREA","PERIMETER", "DRGINDEX_","DRGINDEX_I", "OCODE", "USGS100","USGS250","CD","AREA_1","PERIMETE_1","PLSFILL_","PLSFILL_ID","X_COORD","Y_COORD","AREA_12","PERIMETE_2","COUNTY_","COUNTY_ID","Range_1","Staff"] arcpy.DeleteField_management(outFeatures, dropFields) arcpy.Delete_management(inputfolder+"\out.shp") arcpy.Delete_management(inputfolder+"\outcounty.shp") Get the map document mxd mxd = arcpy.mapping.MapDocument("CURRENT") Get the data frame df = arcpy.mapping.ListDataFrames(mxd,"*")[0] Create a new layer newlayer = arcpy.mapping.Layer(outFeatures) Add the layer to the map at the bottom of the TOC in data frame 0 arcpy.mapping.AddLayer(df, newlayer,"TOP") Refresh arcmap view, table of content arcpy.RefreshActiveView() arcpy.RefreshTOC() del mxd, df, newlayer

Output outFeatures is PExport.shp If Arcmap is open when the script is run using ArcToolbar, a temp new layer (outFeatures) will be displayed on top of table of content in ArcMap.

Summary First, the python script is to get user input shapefile from arctoolbox prompt. Second, the input shapefiles join other required shapefiles to create result output shapefile. Third, check if empty or none data fields exist in table using searchcursor function. Fourth, using add fields (add GIS_ID, DDLAT, DDLON, TEALE_X, TEALE_Y fields and calculate fields to populate the table fields with updated data using updatecursor function. Then, delete temporary shapefiles and table rows. Finally, add a new layer (outFeatures shapefile) to ArcMap on top of the table of content. And refresh the ArcMap document.