HowTo:  Write an ArcPy script to find maps throughout a folder tree and re-path layer data sources

  

import arcpy, os



MapMainFolder = arcpy.GetParameterAsText(0) # topmost folder of maps to be updated

NewDataPath   = arcpy.GetParameterAsText(1) # folder to which the raster data sources have been moved



for (root, dirs, files) in os.walk (MapMainFolder):

  for fileName in files:

    if os.path.splitext (fileName)[1] == ".mxd":

      arcpy.AddMessage (fileName)

      fullPath = os.path.join (root, fileName)

      mxd = arcpy.mapping.MapDocument (fullPath)

      rasterLayersUpdated = 0

      for layer in arcpy.mapping.ListLayers (mxd): # list all layers in all dataframes

        if layer.isRasterLayer:

          if layer.supports ("SERVICEPROPERTIES"):

            if layers.serviceProperties ['ServiceType'] == "ImageServer":

              pass # don't try to re-path an online basemap

          dataSrc = layer.dataSource

          Color = 0

          dataRoot = os.path.dirname (dataSrc)

          if dataRoot.find ("Color") > 0:

            newPath = os.path.join (NewDataPath, "Color")

          else: # B&W

            newPath = NewDataPath

          layer.replaceDataSource (newPath, "RASTER_WORKSPACE", os.path.basename (dataSrc))

          rasterLayersUpdated += 1

      if rasterLayersUpdated > 0:

        mxd.save()



  

1. Adding a script tool