Membuat tabel yang berisi semua nama file (dan mungkin metadata) di File Geodatabase?


12

Saya perlu membuat tabel metadata untuk semua file dalam File Geodatabase.

Apakah mungkin untuk secara otomatis diperbarui dengan nama file baru, dan bahkan mungkin metadata (seperti yang dibuat di editor metadata ArcGIS)?

Jawaban:


23

Berikut ini adalah skrip Python untuk ArcGIS 10 yang pada dasarnya melakukan apa yang Anda inginkan, kecuali bahwa outputnya adalah file CSV, bukan tabel geodatabase. Jangan ragu untuk memodifikasi dan menggunakan sesuka Anda. Perhatikan bahwa itu tidak diuji dengan baik dan tidak didukung, jadi gunakan dengan risiko Anda sendiri.

"""
This script looks through the specified geodatabase and reports the
names of all data elements, their schema owners and their feature
dataset (if applicable). Certain metadata elements such as abstract,
purpose and search keys are also reported.

The output is a CSV file that can be read by Excel, ArcGIS, etc.

Only geodatabases are supported, not folder workspaces.

Note: If run from outside of ArcToolbox, you will need to add
the metadata tool assemblies to the Global Assembly Cache.
See: http://forums.arcgis.com/threads/74468-Python-Errors-in-IDLE-when-processing-metadata

Parameters:
    0 - Input workspace (file geodatabase, personal geodatabase,
            or SDE connection file)
    1 - Output CSV file

Date updated: 2/11/2013
"""

import arcpy
import os
import csv
import tempfile
import codecs
import cStringIO
from xml.etree.ElementTree import ElementTree

def ListWorkspaceContentsAndMetadata(workspace):
    """Generator function that lists the contents of the geodatabase including those within feature datasets.
       Certain metadata elements are also listed. Only geodatabases are supported, not folder workspaces."""

    if not arcpy.Exists(workspace):
        raise ValueError("Workspace %s does not exist!" % workspace)

    desc = arcpy.Describe(workspace)

    if not desc.dataType in ['Workspace', 'FeatureDataset']:
        if not hasattr(desc, "workspaceType") or not desc.workspaceType in ["LocalDatabase", "RemoteDatabase"]:
            raise ValueError("Workspace %s is not a geodatabase!" % workspace)

    children = desc.children
    if desc.dataType == 'FeatureDataset':
        validationWorkspace = os.path.dirname(workspace)
        fdsName = arcpy.ParseTableName(desc.name, validationWorkspace).split(",")[2].strip() # Get the short name of the feature dataset (sans database/owner name)
    else:
        validationWorkspace = workspace
        fdsName = ""

    for child in children:
        # Parse the full table name into database, owner, table name
        database, owner, tableName = [i.strip() if i.strip() != "(null)" else "" for i in arcpy.ParseTableName(child.name, validationWorkspace).split(",")]
        datasetType = child.datasetType if hasattr(child, "datasetType") else ""
        alias = child.aliasName if hasattr(child, "aliasName") else ""
        outrow = [owner, tableName, alias, fdsName, datasetType]
        try:
            outrow.extend(GetMetadataItems(child.catalogPath))
        except:
            pass
        print ",".join(outrow)
        yield outrow

        # Recurse to get the contents of feature datasets
        if datasetType == 'FeatureDataset':
            for outrow in ListWorkspaceContentsAndMetadata(child.catalogPath):
                yield outrow

def WriteCSVFile(csvfile, rows, header=None):
    """Creates a CSV file from the input header and row sequences"""
    with open(csvfile, 'wb') as f:
        f.write(codecs.BOM_UTF8) # Write Byte Order Mark character so Excel knows this is a UTF-8 file
        w = UnicodeWriter(f, dialect='excel', encoding='utf-8')
        if header:
            w.writerow(header)
        w.writerows(rows)

def CreateHeaderRow():
    """Specifies the column names (header row) for the CSV file"""
    return ("OWNER", "TABLE_NAME", "ALIAS", "FEATURE_DATASET", "DATASET_TYPE", "ORIGINATOR", "CONTACT_ORG", "ABSTRACT", "PURPOSE", "SEARCH_KEYS", "THEME_KEYS")

def CreateDummyXMLFile():
    """Creates an XML file with the required root element 'metadata' in
    the user's temporary files directory. Returns the path to the file.
    The calling code is responsible for deleting the temporary file."""
    tempdir = tempfile.gettempdir()
    fd, filepath = tempfile.mkstemp(".xml", text=True)
    with os.fdopen(fd, "w") as f:
        f.write("<metadata />")
        f.close()
    return filepath

def GetMetadataElementTree(dataset):
    """Creates and returns an ElementTree object from the specified
    dataset's metadata"""
    xmlfile = CreateDummyXMLFile()
    arcpy.MetadataImporter_conversion(dataset, xmlfile)
    tree = ElementTree()
    tree.parse(xmlfile)
    os.remove(xmlfile)
    return tree

def GetElementText(tree, elementPath):
    """Returns the specified element's text if it exists or an empty
    string if not."""
    element = tree.find(elementPath)
    return element.text if element != None else ""

def GetFirstElementText(tree, elementPaths):
    """Returns the first found element matching one of the specified
    element paths"""
    result = ""
    for elementPath in elementPaths:
        element = tree.find(elementPath)
        if element != None:
            result = element.text
            break
    return result

def ListElementsText(tree, elementPath):
    """Returns a comma+space-separated list of the text values of all
    instances of the specified element, or an empty string if none are
    found."""
    elements = tree.findall(elementPath)
    if elements:
        return ", ".join([element.text for element in elements])
    else:
        return ""

def GetMetadataItems(dataset):
    """Retrieves certain metadata text elements from the specified dataset"""
    tree = GetMetadataElementTree(dataset)
    originator = GetElementText(tree, "idinfo/citation/citeinfo/origin") # Originator
    pocorg = GetFirstElementText(tree, ("idinfo/ptcontac/cntinfo/cntperp/cntorg", # Point of contact organization (person primary contact)
                                        "idinfo/ptcontac/cntinfo/cntorgp/cntorg")) # Point of contact organization (organization primary contact)
    abstract = GetElementText(tree, "idinfo/descript/abstract") # Abstract
    purpose = GetElementText(tree, "idinfo/descript/purpose") # Purpose
    searchkeys = ListElementsText(tree, "dataIdInfo/searchKeys/keyword") # Search keywords
    themekeys = ListElementsText(tree, "idinfo/keywords/theme/themekey") # Theme keywords
    del tree
    metadataItems = (originator, pocorg, abstract, purpose, searchkeys, themekeys)
    return metadataItems

class UnicodeWriter:
    """
    A CSV writer which will write rows to CSV file "f",
    which is encoded in the given encoding.
    """

    def __init__(self, f, dialect=csv.excel, encoding="utf-8", **kwds):
        # Redirect output to a queue
        self.queue = cStringIO.StringIO()
        self.writer = csv.writer(self.queue, dialect=dialect, **kwds)
        self.stream = f
        self.encoder = codecs.getincrementalencoder(encoding)()

    def writerow(self, row):
        self.writer.writerow([s.encode("utf-8") for s in row])
        # Fetch UTF-8 output from the queue ...
        data = self.queue.getvalue()
        data = data.decode("utf-8")
        # ... and reencode it into the target encoding
        data = self.encoder.encode(data)
        # write to the target stream
        self.stream.write(data)
        # empty queue
        self.queue.truncate(0)

    def writerows(self, rows):
        for row in rows:
            self.writerow(row)

if __name__ == '__main__':
    workspace = arcpy.GetParameterAsText(0)
    csvFile = arcpy.GetParameterAsText(1)
    headerRow = CreateHeaderRow()
    print headerRow
    datasetRows = ListWorkspaceContentsAndMetadata(workspace)
    WriteCSVFile(csvFile, datasetRows, headerRow)

@ blah238 Skrip hebat! Saat menjalankan skrip Anda, banyak kolom tidak diisi dengan metadata terkait. Kolom yang terisi memiliki metadata mereka dibuat oleh orang lain tahun lalu. Apakah metadata saya harus dalam format tertentu agar skrip dapat menangkap semua metadata? Atau adakah hal lain yang mungkin menyebabkan tidak adanya metadata ini? Menjalankan ArcMap 10.3 dan menggunakan sebagian besar SDE.
reevesii

@reevesii Ada banyak format metadata yang berbeda, jadi Anda mungkin perlu menyesuaikan skrip untuk mengakses dan menampilkan item metadata tertentu yang Anda inginkan (lihat GetMetadataItemsdan CreateHeaderRowfungsinya).
blah238
Dengan menggunakan situs kami, Anda mengakui telah membaca dan memahami Kebijakan Cookie dan Kebijakan Privasi kami.
Licensed under cc by-sa 3.0 with attribution required.