There is a way to do this if you use the Attachments function.
https://developers.arcgis.com/arcade/function-reference/featureset_functions/#attachments
This function isn't available in every context, and I don't think it's part of the Advanced Formatting profile, so you'll probably need to use a Data Expression. But essentially you just iterate through your features and use that function to get the information about each attachment.
https://developers.arcgis.com/arcade/guide/types/#attachment
You can see in the type definition that the objects in the Attachments array include EXIF metadata, among other things.
Here's what it might look like. You're looping through every attachment for every feature, so this can be quite a time-consuming expression to evaluate.
var fs = FeatureSetByPortalItem(
Portal('your portal url'),
'itemid of layer',
0,
['objectid'],
false
)
var fs_dict = {
fields: [
{name: 'filename', type: 'esriFieldTypeString'},
{name: 'exif', type: 'esriFieldTypeString'},
{name: 'parent_id', type: 'esriFieldTypeInteger'},
{name: 'file_id', type: 'esriFieldTypeInteger'}
],
geometryType: '',
features: []
}
for ( var f in fs ) {
var atts = Attachments(f)
for ( var a in atts ) {
Push(
fs_dict['features'],
{ attributes: {
filename: atts[a]['name'],
exif: Text(atts[a]['exifInfo']),
file_id: atts[a]['id'],
parent_id: f['objectid']
}}
)
}
}
return FeatureSet(fs_dict)
The output is just going to be a table, but you can use HTML to pull in the actual images using the format <feature service URL>/<parent_id>/attachments/<file_id>
In this way, you can embed the image itself into your list or table or what have you. Reworking the exif data might take some work, since it's just an array, and we don't know exactly what each file is going to be pulling in. We wrap the exif array in Text() in our expression, but you could easily use Advanced Formatting to turn that back into an array for better formatting.
- Josh Carlson
Kendall County GIS
