Ich bin häufig auf Fragen zum Herunterladen von Anhängen (z. B. Bilder und Dokumente) aus ArcGIS Online Feature Layers gestoßen. Ziel ist es, eine alternative Lösung zu dem derzeit angebotenen bereitzustellen.<\/P>
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Erstens werden Anhänge beim Exportieren von Daten über ArcGIS Online nur dann einbezogen, wenn als Dateiformat eine File Geodatabase exportiert wird. Der Grund dafür ist, dass die File Geodatabase das einzige Format ist, das verwandte Datensätze unterstützt. Daher lautet die häufigste Antwort zum Zugriff auf Feature Layer-Anhänge außerhalb von ArcGIS Online, den Feature Layer als File Geodatabase zu exportieren und die Daten mit einem Skript wie diesem<\/A> über ArcGIS Desktop zu extrahieren. Es gibt auch ein Sync-Skript<\/A>, das eine lokale File Geodatabase mit einem gehosteten Feature Layer synchronisieren kann. Diese funktionieren gut, sind jedoch auf ArcGIS Desktop angewiesen und im Fall der ersten Option müssen Sie die File Geodatabase (die mit zunehmenden Daten wachsen kann) vor dem Ausführen des Skripts herunterladen.<\/P><\/P>Aus diesem Grund habe ich ein Skript mit der neuen ArcGIS API for Python<\/A> erstellt, das unabhängig von ArcGIS Desktop funktioniert. Tatsächlich arbeitet es direkt mit einem Web GIS, sodass Sie nicht einmal eine File Geodatabase herunterladen müssen, um auf Ihre Anhänge zuzugreifen. Es kann regelmäßig erneut ausgeführt werden und lädt nur neue Anhänge auf die Festplatte herunter, wenn diese noch nicht zuvor heruntergeladen wurden.<\/P><\/P>Was macht dieses Skript?<\/STRONG><\/P><\/P>Erstellt einen Ordner, in dem Feature-Anhänge gespeichert werden (z. B. Attachment Downloads)<\/LI>Innerhalb dieses Ordners wird für jede Ebene im angegebenen Feature Layer ein Unterordner erstelltWenn die Variable AttachmentStorage auf 'GroupedFolder<\/SPAN>' gesetzt ist, werden Anhänge im Format ObjectId-AttachmentId-OriginalFileName in einem einzigen Ordner gespeichert<\/LI>Wenn die Variable AttachmentStorage auf 'IndividualFolder' gesetzt ist, wird für jedes Feature mit Anhang ein neuer Ordner erstellt (benannt nach der Objekt-ID des Features), während die Anhänge im Format AttachmentId-OriginalFileName darin gespeichert werden<\/LI><\/OL><\/LI>Wenn der Anhang bereits auf der Festplatte vorhanden ist, wird er nicht erneut heruntergeladen<\/LI>Zusammenfassung der Downloads (Gesamtanzahl der Downloads und Gesamtgröße der Anhänge) wird als abschließende Konsolenausgabe bereitgestellt<\/LI><\/OL><\/P>Wie richten Sie es ein?<\/STRONG><\/P><\/P>Befolgen Sie den ArcGIS API for Python Installations- und Einrichtungsleitfaden<\/A>Wenn Sie Anaconda verwenden, können Sie die .yml-Datei verwenden, um die entsprechende Umgebung zu erstellen<\/LI><\/OL><\/LI>Wenn Sie die Startup.bat-Datei verwenden, bearbeiten Sie diese (in einem Texteditor), um auf die entsprechenden Ordner zu verweisen<\/LI>Sobald Sie ein Jupyter Notebook geöffnet haben, fügen Sie die angehängte .zip-Datei an einem zugänglichen Ort ein (und entpacken sie)<\/LI>Öffnen Sie die Datei DownloadAttachments.ipynb über Jupyter Notebooks und führen Sie sie aus (klicken Sie in den Code und drücken Sie Strg+Enter)<\/LI>Das Skript läuft auf dem angegebenen öffentlichen Feature Layer und lädt die Anhänge in den angegebenen Downloads-Ordner herunter<\/LI>Bei jedem Ausführen des Skripts wird eine zugehörige Protokolldatei im Logging-Ordner erstellt<\/LI><\/OL><\/P>Hinweise:<\/STRONG><\/P><\/P>Aktualisieren Sie die Variable FeatureLayerId<\/SPAN>, um das Skript für Ihren eigenen Feature Layer auszuführen<\/LI>Geben Sie Ihren PortalUserName und PortalPassword an, falls der Feature Layer gesichert ist<\/LI>Die Namen der Ordner werden gefiltert, sodass nur 0-9 und a-Z Zeichen angezeigt werden<\/LI>Dieses Skript wurde nicht gegen ArcGIS Enterprise getestet (nur Feature Layers, die in ArcGIS Online gehostet werden), sollte aber dennoch funktionieren<\/LI>Der Code ist auch über das Esri developer-support GitHub Repository<\/A> verfügbar<\/LI>}
Aus diesem Grund habe ich ein Skript mit der neuen
Was macht dieses Skript?<\/STRONG><\/P><\/P>Erstellt einen Ordner, in dem Feature-Anhänge gespeichert werden (z. B. Attachment Downloads)<\/LI>Innerhalb dieses Ordners wird für jede Ebene im angegebenen Feature Layer ein Unterordner erstelltWenn die Variable AttachmentStorage auf 'GroupedFolder<\/SPAN>' gesetzt ist, werden Anhänge im Format ObjectId-AttachmentId-OriginalFileName in einem einzigen Ordner gespeichert<\/LI>Wenn die Variable AttachmentStorage auf 'IndividualFolder' gesetzt ist, wird für jedes Feature mit Anhang ein neuer Ordner erstellt (benannt nach der Objekt-ID des Features), während die Anhänge im Format AttachmentId-OriginalFileName darin gespeichert werden<\/LI><\/OL><\/LI>Wenn der Anhang bereits auf der Festplatte vorhanden ist, wird er nicht erneut heruntergeladen<\/LI>Zusammenfassung der Downloads (Gesamtanzahl der Downloads und Gesamtgröße der Anhänge) wird als abschließende Konsolenausgabe bereitgestellt<\/LI><\/OL><\/P>Wie richten Sie es ein?<\/STRONG><\/P><\/P>Befolgen Sie den ArcGIS API for Python
Hinweise:<\/STRONG><\/P><\/P>Aktualisieren Sie die Variable FeatureLayerId<\/SPAN>, um das Skript für Ihren eigenen Feature Layer auszuführen<\/LI>Geben Sie Ihren PortalUserName und PortalPassword an, falls der Feature Layer gesichert ist<\/LI>Die Namen der Ordner werden gefiltert, sodass nur 0-9 und a-Z Zeichen angezeigt werden<\/LI>Dieses Skript wurde nicht gegen ArcGIS Enterprise getestet (nur Feature Layers, die in ArcGIS Online gehostet werden), sollte aber dennoch funktionieren<\/LI>Der Code ist auch über das
Hi Holly - have you ever got this script working before? I have not replicated this behaviour with the version of the Python API included with ArcGIS Pro 2.1.2 (v1.2.5). Can you test with the FeatureLayerId = '092d075f4b3a40f78cf1329b20b0d5e7' - this is a public layer so you should be able to access.
I initially wrote this using v1.2.0 of the ArcGIS API for Python - I have not tested it with later versions.
Hi Michael, thanks for this post...very useful!
I am trying to download a feature layer created by a Survey123 application that allows users to capture multiple photos per record. To do so we had to build it as a relationship. Here is the URL: https:[host]/portal/home/item.html?id=f0dcf24f2bb9440d9fa2c8ec64141fe1#data. When viewing the Data tab from the Portal I can select the "(0) Add" text in the "Photos and Files" field to access the photos. I tried plugging f0dcf24f2bb9440d9fa2c8ec64141fe1#data into the FeatureLayerID =, but it returns no files. Any idea what I may be missing?
Hi Eric,
If the photos are stored in a table with no spatial attributes, it will appear as a table through the API (as opposed to a layer). Therefore the 'layers' text in lines 81/82/96 have to be chanced to 'tables'.
<SPAN class="comment token">#Lines 81/82</SPAN> <SPAN class="keyword token">for</SPAN> i <SPAN class="keyword token">in</SPAN> range<SPAN class="punctuation token">(</SPAN>len<SPAN class="punctuation token">(</SPAN>itemObject<SPAN class="punctuation token">.</SPAN>tables<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN> featureLayer <SPAN class="operator token">=</SPAN> itemObject<SPAN class="punctuation token">.</SPAN>tables<SPAN class="punctuation token">[</SPAN>i<SPAN class="punctuation token">]</SPAN> <SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN><SPAN class="punctuation token">.</SPAN> <SPAN class="comment token">#Line 96</SPAN> logger<SPAN class="punctuation token">.</SPAN>info<SPAN class="punctuation token">(</SPAN><SPAN class="string token">'Currently looping through feature attachments in layer {} of {}: storing in folder named "{}"'</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>str<SPAN class="punctuation token">(</SPAN>i <SPAN class="operator token">+</SPAN> <SPAN class="number token">1</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> str<SPAN class="punctuation token">(</SPAN>len<SPAN class="punctuation token">(</SPAN>itemObject<SPAN class="punctuation token">.</SPAN>tables<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">,</SPAN> featureLayerName<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
This should loop through any associated tables (as opposed to layers) and return the appropriate results.
Kind regards,
Mikie
That was exactly what I needed! Thanks so much!
Hey Mike,
The script is running as expected, but I am trying to get it to place the attachments in a folder named after a value specified by a specific field ("Subject") in the related layer. Do you have any pointers for how to configure that?
Thanks!
Eric
Hi Eric - a similar question came through in one of the comments above. You would have to alter the query to send back the appropriate attributes, and then use the returned attributes whilst specifying the associated file name.
I can't carry out this program because the following error happens. Please tell me the solution.
My feature layer comprises Japanese words. So this error may happen.
Is this program applicable to Japanese layers?
File "C:\ProgramData\Anaconda3\lib\http\client.py", line 1117, in putrequest self._output(request.encode('ascii'))
UnicodeEncodeError: 'ascii' codec can't encode characters in position 43-45: ordinal not in range(128)
Hi Holly,
I was getting the same error as you. I fixed it by adding [0] to the end of the currentAttachmentPath variable so that it gets the first and only attachment path in that list and uses it. I had to add it to this part: renameFile(currentAttachmentPath[0], newAttachmentPath) under both GroupedFolder and IndividualFolder. I tested it on Michael's public layer, and was able to download the attachments.
Thank you very much.
I'll try it.
2018年7月6日(金) 3:08 Chelsea Rozek <geonet@esri.com>:
GeoNet <https://community.esri.com/?et=watches.email.document_comment>Downloading Feature Layer Attachments via the ArcGIS API for Pythonnew comment by Chelsea Rozek<https://community.esri.com/people/rozekc_washtenaw?et=watches.email.document_comment> Viewall comments on this document<https://community.esri.com/docs/DOC-10441-downloading-feature-layer-attachments?commentID=63017&et=watches.email.document_comment#comment-63017>
GeoNet <https://community.esri.com/?et=watches.email.document_comment>
Downloading Feature Layer Attachments via the ArcGIS API for Python
new comment by Chelsea Rozek
<https://community.esri.com/people/rozekc_washtenaw?et=watches.email.document_comment> View
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Hi 竹元 貴彦,
Did you get the script working with the pre-set public layer? I have not tested this against layers with Japanese. Does the layer itself (layer name, field names, etc.) contain Japanese, or is there Japanese only in the attributes? Is the layer available publically, or could you share it with me through a group? My ArcGIS Online username is mikie.kelly.
Mikie,
This is an awesome script and I was able to get it working quickly despite limited Python experience. I am wondering how line 92 might be modified to fetch GUIDs instead of OIDs.
I worked using private layer. So I can't show it imediately. I make or search another layer that contains Japanese to show you the problem as soon as possible.
My private layer has Japanese both field name and attributes.
Hi Bob,
Global ID's are returned with the attachments. You can access them by adding to lines 108-111 as below (both attachment Global ID and attachment parent Global ID accessible):
<SPAN class="keyword token">for</SPAN> k <SPAN class="keyword token">in</SPAN> range<SPAN class="punctuation token">(</SPAN>len<SPAN class="punctuation token">(</SPAN>currentObjectIdAttachments<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN> attachmentGlobalId <SPAN class="operator token">=</SPAN> currentObjectIdAttachments<SPAN class="punctuation token">[</SPAN>k<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">'globalId'</SPAN><SPAN class="punctuation token">]</SPAN> attachmentParentGlobalId <SPAN class="operator token">=</SPAN> currentObjectIdAttachments<SPAN class="punctuation token">[</SPAN>k<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">'parentGlobalId'</SPAN><SPAN class="punctuation token">]</SPAN> attachmentId <SPAN class="operator token">=</SPAN> currentObjectIdAttachments<SPAN class="punctuation token">[</SPAN>k<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">'id'</SPAN><SPAN class="punctuation token">]</SPAN> attachmentName <SPAN class="operator token">=</SPAN> currentObjectIdAttachments<SPAN class="punctuation token">[</SPAN>k<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">'name'</SPAN><SPAN class="punctuation token">]</SPAN> attachmentSize <SPAN class="operator token">=</SPAN> currentObjectIdAttachments<SPAN class="punctuation token">[</SPAN>k<SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">'size'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
Then you can reference them when naming the file 117
fileName = '{}-{}-{}'.format(attachmentGlobalId, attachmentParentGlobalId, attachmentName)<SPAN class="line-numbers-rows"><SPAN></SPAN></SPAN>
Works like a charm. Thanks.
Great script. I would also appreciate having the attachment files named based on a field in the associated attribute table. You mentioned this is possible but would require some rejigging -- have you or anyone else developed script for this?
Annalise
Hi Annalise,
I'm afraid not, at least not that I'm aware of.
I work with the U.S. Fish and Wildlife Service and use an Enterprise Account login. Can this script function with an Enterprise login?
#What are your ArcGIS Enterprise/ArcGIS credentials? This is case sensitive.PortalUserName = 'email here'PortalPassword = 'password here'PortalUrl = 'https://fws.maps.arcgis.com'
I changed the PortalURL to direct to the FWS ArcGIS URL but I keep getting an error message -- [ERROR:arcgis._impl.connection:Invalid username or password.]
I've confirmed that the username and password I entered are correct.
https://fws.maps.arcgis.com is an address for ArcGIS as opposed to ArcGIS Enterprise. All ArcGIS accounts can simply use https://www.arcgis.com for the PortalUrl. An ArcGIS Enterprise address is likely to look like this: https://portalcomputer.domain.com/portal/home.
PortalUserName = 'MKelly@MyDomain'
PortalPassword = 'MyPassword'
PortalUrl = 'https://portalcomputer.domain.com/portal/home'
Further information can be found here. One thing to note is that the username can be case sensitive - you need to replicate how it appears in the Portal organisation page.
Hi Michael
Great script, quick question: Is it possible to get a file-like object from the attachments manager without downloading the file locally first?
So instead of downloading the file with attachments.download i would want to have the attachment as an in-memory object...
Currently my script first downloads the attachment and then opens it into a binary file-like object and then delete the local file when i am done....
Any help will be appreciated.
Hi Deon,
I haven't noticed anything like that in the AttachmentManager class - is there a problem with the approach you are currently taking?
get_list includes the URL of any attachments (from what I remember) if that's any use?
Hi Michael Kelly,
A couple of days ago our machines were upgraded to ArcGIS Pro 2.2.1 (Python 3.6.5).
Since then attachments fail to include "OBJECTID - ATTACHMENTID" in the attachment file names (only attachment names).
Can you think of the reason for this - from the top of your head? Otherwise, I'm more than happy to take a further look.
But I thought I'd ask you first.
Thanks,
Gee
All sorted.
It was the same error as what Holly Tran was experiencing. And managed to get it working by using Chelsea Rozek's suggestion.
Thanks guys,
Getting this error with enterprise. Anyone have a possible solution?
Sounds like Holly's error above, see my previous response for a solution: adding [0] to the end of the currentAttachmentPath variable
I did that step and this error popped up.
Is the feature layer you're running this on publicly accessible? If yes, what's the url?
this worked for me too (ie just adding [0] on line 123, and line 137, so that the line is
renameFile(currentAttachmentPath[0], newAttachmentPath)
instead of
renameFile(currentAttachmentPath, newAttachmentPath)
- I am running python 3.7.2, so it seems to be an issues that comes up when using a later version of python
Hello Michael Kelly. Thank you fo putting script together and sharing it with the Community. I forked your project in Github. I'm working on adding capabilities the Community is requesting here and will submit a commit soon. Plus I am adding the ability to choose a portal that is Enterprise or AGO, and some other automation.
As for saving each attachment with a file name using an attribute value I am running into an issue with the FeatureSet object that is returned from Query() I am passing in the currentObjectId to obtain the field containing the pole number, which is esupportstructure_facilityid.
currentObjectId <SPAN class="operator token">=</SPAN> featureObjectIds<SPAN class="punctuation token">[</SPAN><SPAN class="string token">'objectIds'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN>j<SPAN class="punctuation token">]</SPAN> facilityID <SPAN class="operator token">=</SPAN> featureLayer<SPAN class="punctuation token">.</SPAN>query<SPAN class="punctuation token">(</SPAN>objectids<SPAN class="operator token">=</SPAN>currentObjectId<SPAN class="punctuation token">,</SPAN> outFields<SPAN class="operator token">=</SPAN><SPAN class="string token">'esupportstructure_facilityid'</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="line-numbers-rows"><SPAN></SPAN><SPAN></SPAN><SPAN></SPAN></SPAN>
The documentation appears to return a JSON object so I also tried treated it as such. When I do that another error appears as attached below,
FeatureSet' object is not subscriptable
I have not found any ArcGIS Python API examples that work with FeatureSet object and Query(), can you point to some samples or provide a snippet.
---------------------------------------------------------------------------TypeError Traceback (most recent call last)<ipython-input-1-bc6c83cbc278> in <module> 202 currentObjectId = featureObjectIds['objectIds'][j] 203 facilityID = featureLayer.query(objectids=currentObjectId, outFields='esupportstructure_facilityid')--> 204 poleNumber = facilityID['eSupportStructure_FACILITYID'] 205 logger.info(f'{poleNumber}') 206 currentObjectIdAttachments = featureLayer.attachments.get_list(oid=currentObjectId)TypeError: 'FeatureSet' object is not subscriptable
JSON Response from Query().
INFO:__main__:{"features": [{"geometry": {"x": 2678790.012921214, "y": 236090.84788563848}, "attributes": {"eSupportStructure_FACILITYID": "47185"}}], "objectIdFieldName": "OBJECTID", "globalIdFieldName": "GlobalID", "spatialReference": {"wkid": 102660, "latestWkid": 2238}, "geometryType": "esriGeometryPoint", "fields": [{"name": "eSupportStructure_FACILITYID", "alias": "Pole Number", "type": "esriFieldTypeString", "length": 20}]}
Michael Kelly Thanks for this script! I'm using it for a few applications and it works great! Recently I implemented a survey123 app that captures pictures in a repeat, and so images are attached to a related table. Can this script be modified to download attachments from related tables, or is does it need to be from the feature layer?
Hi, everybody.I followed the post to download the attached photos from a survey I generated (the photos are inside a table).I have also modified the script because I had the same problem as @Chelsea Rozek
I'm running the script inside the ArcGis Online Notebook.It doesn't give me any error and it seems to download the content. However I go to the path where the downloaded photos are supposed to be but the folder doesn't exist. Although the script is saying that the photos are downloaded.
INFO:__main__:Time: 2020-06-08 10:44:57.796204 INFO:__main__:Currently looping through feature attachments in layer 1 of 2: storing in folder named "0-foto" INFO:__main__:There are 386 features to iterate in this layer INFO:__main__:The size of the current attachment being downloaded is 1.17647MB ----------
INFO:__main__:C:\ScriptDownloads\\0-foto\\103/fotos-20200525-132307.jpg being renamed as C:\ScriptDownloads\\0-foto\\103\103-fotos-20200525-132307.jpg INFO:__main__:The size of the current attachment being downloaded is 1.69949MB
Any suggestions? Thanks
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