Is there a way to display data from a KML file in a KMLLayer. I found some code at the bottom of this post Is it possible to load KML from a file?, that works for displaying KML files in the 3.x api. Is there something similar that can be done in the 4.x api?
You can do this, but you have to cobble a solution together. I don't have my own link handy at the moment but I'll post the link to a working example tonight.
Anyways, the strategy is to use the File & FileReader API of HTML 5 to allow your user to specify their desired KML file and to read its contents in. The next step is to convert the KML into JSON/geoJSON and then make your JS API map layer from that. There are JS libraries that facilitate this conversion.
Now, I will say that the working example I'll share later was written with simple KMLs in mind (a single polygon or several). I don't know how well it might work if the KML files you intend to support are more complex.
Anyways, more later..
I was able to get the KML file import working, using this method. Some of my KMLs are more complex, but I think I can use the results from https://utility.arcgis.com/sharing/kml to get what I need that is missing from the kml to geoJSON conversion.
Thank you!
Ok, I couldn't find/remember my link because I still had it just on my machine's Localhost.
Anyways, I've uploaded it and you can access it here: https://umpqualsogproject.org/ra32screener/
It's an app I've been developing but it's not finished. It's a long story but the part where you upload your KML should work fine.
Hope this helps,
Steve
I can directly call the https://utility.arcgis.com/sharing/kml web service with the contents of the file that I loaded in, but I don't see any way to make a KMLLayer from the response. When I do this I get the following response:
The last post in Is it possible to load KML from a file? shows how to create the KMLLayer from the above response in the 3.X api, but the KMLLayer in 4.X doesn't have the parameters necessary to use this method.
I just tried using URL.createObjectURL, but the https://utility.arcgis.com/sharing/kml?url=<generatedUrl> web service ,that is called when the KMLLayer is initialized, immediately returns an "Invalid URL" error.
The url that is generated looks like "blob:http://mysite.com/56f7c728-05d6-4fb1-8a4e-0e76714ca57c". If I remove the "blob:" part of the url, then the https://utility.arcgis.com/sharing/kml service will spin for a while and eventually return a "File not found. Wrong url or out of memory" error.
It looks like the web service that supports the KMLLayer rejects any url with something before "http".
Can you use URL.createObjectURL to create a URL to pass to KMLLayer?
Hi Egge-Jan Pollé,
The sample shows how to load a KMLLayer using a url. Is there a way to display a KMLLayer from local files on the user's machine in 4.x? In my app, I've added the ability for a user to select local files and have them displayed on the map.
Hi Caleb Schwind,
Yes, KMLLayer is supported in the 4.x api since version 4.5:
KMLLayer | ArcGIS API for JavaScript 4.14
You might have a look at this sample: KMLLayer | ArcGIS API for JavaScript 4.14
HTH,
Egge-Jan
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